2006-07-14 00:24:40 -07:00
										 
									 
								 
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								/* taskstats.h - exporting per-task statistics
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								 *
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								 * Copyright (C) Shailabh Nagar, IBM Corp. 2006
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								 *           (C) Balbir Singh,   IBM Corp. 2006
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											2006-09-30 23:28:55 -07:00
										 
									 
								 
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								 *           (C) Jay Lan,        SGI, 2006
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								 *
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								 * This program is free software; you can redistribute it and/or modify it
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								 * under the terms of version 2.1 of the GNU Lesser General Public License
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								 * as published by the Free Software Foundation.
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								 *
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								 * This program is distributed in the hope that it would be useful, but
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								 * WITHOUT ANY WARRANTY; without even the implied warranty of
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								 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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								 */
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								#ifndef _LINUX_TASKSTATS_H
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								#define _LINUX_TASKSTATS_H
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											2009-01-30 22:21:19 +05:30
										 
									 
								 
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								#include <linux/types.h>
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								/* Format for per-task data returned to userland when
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								 *	- a task exits
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								 *	- listener requests stats for a task
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								 *
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								 * The struct is versioned. Newer versions should only add fields to
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								 * the bottom of the struct to maintain backward compatibility.
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								 *
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								 *
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								 * To add new fields
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								 *	a) bump up TASKSTATS_VERSION
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								 *	b) add comment indicating new version number at end of struct
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								 *	c) add new fields after version comment; maintain 64-bit alignment
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								 */
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											2006-09-30 23:28:55 -07:00
										 
									 
								 
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											2010-12-21 17:24:30 -08:00
										 
									 
								 
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								#define TASKSTATS_VERSION	8
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											2006-09-30 23:29:00 -07:00
										 
									 
								 
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								#define TS_COMM_LEN		32	/* should be >= TASK_COMM_LEN
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											2006-09-30 23:28:55 -07:00
										 
									 
								 
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													 * in linux/sched.h */
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								struct taskstats {
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									/* The version number of this struct. This field is always set to
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									 * TAKSTATS_VERSION, which is defined in <linux/taskstats.h>.
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									 * Each time the struct is changed, the value should be incremented.
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									 */
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											2006-07-14 00:24:41 -07:00
										 
									 
								 
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									__u16	version;
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											2006-09-30 23:29:00 -07:00
										 
									 
								 
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									__u32	ac_exitcode;		/* Exit status */
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									/* The accounting flags of a task as defined in <linux/acct.h>
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									 * Defined values are AFORK, ASU, ACOMPAT, ACORE, and AXSIG.
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									 */
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									__u8	ac_flag;		/* Record flags */
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									__u8	ac_nice;		/* task_nice */
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											2006-07-14 00:24:41 -07:00
										 
									 
								 
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									/* Delay accounting fields start
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									 *
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									 * All values, until comment "Delay accounting fields end" are
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									 * available only if delay accounting is enabled, even though the last
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									 * few fields are not delays
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									 *
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									 * xxx_count is the number of delay values recorded
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									 * xxx_delay_total is the corresponding cumulative delay in nanoseconds
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									 *
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									 * xxx_delay_total wraps around to zero on overflow
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									 * xxx_count incremented regardless of overflow
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									 */
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									/* Delay waiting for cpu, while runnable
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									 * count, delay_total NOT updated atomically
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									 */
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												Taskstats fix the structure members alignment issue
We broke the the alignment of members of taskstats to the 8 byte boundary
with the CSA patches.  In the current kernel, the taskstats structure is
not suitable for use by 32 bit applications in a 64 bit kernel.
On x86_64
Offsets of taskstats' members (64 bit kernel, 64 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        16,     # cpu_count
        24,     # cpu_delay_total
        32,     # blkio_count
        40,     # blkio_delay_total
        48,     # swapin_count
        56,     # swapin_delay_total
        64,     # cpu_run_real_total
        72,     # cpu_run_virtual_total
        80,     # ac_comm
        112,    # ac_sched
        113,    # ac_pad
        116,    # ac_uid
        120,    # ac_gid
        124,    # ac_pid
        128,    # ac_ppid
        132,    # ac_btime
        136,    # ac_etime
        144,    # ac_utime
        152,    # ac_stime
        160,    # ac_minflt
        168,    # ac_majflt
        176,    # coremem
        184,    # virtmem
        192,    # hiwater_rss
        200,    # hiwater_vm
        208,    # read_char
        216,    # write_char
        224,    # read_syscalls
        232,    # write_syscalls
        240,    # read_bytes
        248,    # write_bytes
        256,    # cancelled_write_bytes
    );
Offsets of taskstats' members (64 bit kernel, 32 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        12,     # cpu_count
        20,     # cpu_delay_total
        28,     # blkio_count
        36,     # blkio_delay_total
        44,     # swapin_count
        52,     # swapin_delay_total
        60,     # cpu_run_real_total
        68,     # cpu_run_virtual_total
        76,     # ac_comm
        108,    # ac_sched
        109,    # ac_pad
        112,    # ac_uid
        116,    # ac_gid
        120,    # ac_pid
        124,    # ac_ppid
        128,    # ac_btime
        132,    # ac_etime
        140,    # ac_utime
        148,    # ac_stime
        156,    # ac_minflt
        164,    # ac_majflt
        172,    # coremem
        180,    # virtmem
        188,    # hiwater_rss
        196,    # hiwater_vm
        204,    # read_char
        212,    # write_char
        220,    # read_syscalls
        228,    # write_syscalls
        236,    # read_bytes
        244,    # write_bytes
        252,    # cancelled_write_bytes
    );
This is one way to solve the problem without re-arranging structure members
is to pack the structure.  The patch adds an __attribute__((aligned(8))) to
the taskstats structure members so that 32 bit applications using taskstats
can work with a 64 bit kernel.
Using __attribute__((packed)) would break the 64 bit alignment of members.
The fix was tested on x86_64. After the fix, we got
Offsets of taskstats' members (64 bit kernel, 64 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        16,     # cpu_count
        24,     # cpu_delay_total
        32,     # blkio_count
        40,     # blkio_delay_total
        48,     # swapin_count
        56,     # swapin_delay_total
        64,     # cpu_run_real_total
        72,     # cpu_run_virtual_total
        80,     # ac_comm
        112,    # ac_sched
        113,    # ac_pad
        120,    # ac_uid
        124,    # ac_gid
        128,    # ac_pid
        132,    # ac_ppid
        136,    # ac_btime
        144,    # ac_etime
        152,    # ac_utime
        160,    # ac_stime
        168,    # ac_minflt
        176,    # ac_majflt
        184,    # coremem
        192,    # virtmem
        200,    # hiwater_rss
        208,    # hiwater_vm
        216,    # read_char
        224,    # write_char
        232,    # read_syscalls
        240,    # write_syscalls
        248,    # read_bytes
        256,    # write_bytes
        264,    # cancelled_write_bytes
    );
Offsets of taskstats' members (64 bit kernel, 32 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        16,     # cpu_count
        24,     # cpu_delay_total
        32,     # blkio_count
        40,     # blkio_delay_total
        48,     # swapin_count
        56,     # swapin_delay_total
        64,     # cpu_run_real_total
        72,     # cpu_run_virtual_total
        80,     # ac_comm
        112,    # ac_sched
        113,    # ac_pad
        120,    # ac_uid
        124,    # ac_gid
        128,    # ac_pid
        132,    # ac_ppid
        136,    # ac_btime
        144,    # ac_etime
        152,    # ac_utime
        160,    # ac_stime
        168,    # ac_minflt
        176,    # ac_majflt
        184,    # coremem
        192,    # virtmem
        200,    # hiwater_rss
        208,    # hiwater_vm
        216,    # read_char
        224,    # write_char
        232,    # read_syscalls
        240,    # write_syscalls
        248,    # read_bytes
        256,    # write_bytes
        264,    # cancelled_write_bytes
    );
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Jay Lan <jlan@engr.sgi.com>
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
											
										 
										
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									__u64	cpu_count __attribute__((aligned(8)));
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									__u64	cpu_delay_total;
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									/* Following four fields atomically updated using task->delays->lock */
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									/* Delay waiting for synchronous block I/O to complete
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									 * does not account for delays in I/O submission
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									 */
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									__u64	blkio_count;
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									__u64	blkio_delay_total;
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									/* Delay waiting for page fault I/O (swap in only) */
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									__u64	swapin_count;
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									__u64	swapin_delay_total;
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									/* cpu "wall-clock" running time
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									 * On some architectures, value will adjust for cpu time stolen
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									 * from the kernel in involuntary waits due to virtualization.
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									 * Value is cumulative, in nanoseconds, without a corresponding count
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											2007-10-18 03:06:35 -07:00
										 
									 
								 
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									 * and wraps around to zero silently on overflow
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									 */
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									__u64	cpu_run_real_total;
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									/* cpu "virtual" running time
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									 * Uses time intervals seen by the kernel i.e. no adjustment
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									 * for kernel's involuntary waits due to virtualization.
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									 * Value is cumulative, in nanoseconds, without a corresponding count
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									 * and wraps around to zero silently on overflow
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									 */
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									__u64	cpu_run_virtual_total;
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									/* Delay accounting fields end */
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									/* version 1 ends here */
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									/* Basic Accounting Fields start */
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									char	ac_comm[TS_COMM_LEN];	/* Command name */
							 | 
						
					
						
							
								
									
										
											 
										 
										
											
												Taskstats fix the structure members alignment issue
We broke the the alignment of members of taskstats to the 8 byte boundary
with the CSA patches.  In the current kernel, the taskstats structure is
not suitable for use by 32 bit applications in a 64 bit kernel.
On x86_64
Offsets of taskstats' members (64 bit kernel, 64 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        16,     # cpu_count
        24,     # cpu_delay_total
        32,     # blkio_count
        40,     # blkio_delay_total
        48,     # swapin_count
        56,     # swapin_delay_total
        64,     # cpu_run_real_total
        72,     # cpu_run_virtual_total
        80,     # ac_comm
        112,    # ac_sched
        113,    # ac_pad
        116,    # ac_uid
        120,    # ac_gid
        124,    # ac_pid
        128,    # ac_ppid
        132,    # ac_btime
        136,    # ac_etime
        144,    # ac_utime
        152,    # ac_stime
        160,    # ac_minflt
        168,    # ac_majflt
        176,    # coremem
        184,    # virtmem
        192,    # hiwater_rss
        200,    # hiwater_vm
        208,    # read_char
        216,    # write_char
        224,    # read_syscalls
        232,    # write_syscalls
        240,    # read_bytes
        248,    # write_bytes
        256,    # cancelled_write_bytes
    );
Offsets of taskstats' members (64 bit kernel, 32 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        12,     # cpu_count
        20,     # cpu_delay_total
        28,     # blkio_count
        36,     # blkio_delay_total
        44,     # swapin_count
        52,     # swapin_delay_total
        60,     # cpu_run_real_total
        68,     # cpu_run_virtual_total
        76,     # ac_comm
        108,    # ac_sched
        109,    # ac_pad
        112,    # ac_uid
        116,    # ac_gid
        120,    # ac_pid
        124,    # ac_ppid
        128,    # ac_btime
        132,    # ac_etime
        140,    # ac_utime
        148,    # ac_stime
        156,    # ac_minflt
        164,    # ac_majflt
        172,    # coremem
        180,    # virtmem
        188,    # hiwater_rss
        196,    # hiwater_vm
        204,    # read_char
        212,    # write_char
        220,    # read_syscalls
        228,    # write_syscalls
        236,    # read_bytes
        244,    # write_bytes
        252,    # cancelled_write_bytes
    );
This is one way to solve the problem without re-arranging structure members
is to pack the structure.  The patch adds an __attribute__((aligned(8))) to
the taskstats structure members so that 32 bit applications using taskstats
can work with a 64 bit kernel.
Using __attribute__((packed)) would break the 64 bit alignment of members.
The fix was tested on x86_64. After the fix, we got
Offsets of taskstats' members (64 bit kernel, 64 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        16,     # cpu_count
        24,     # cpu_delay_total
        32,     # blkio_count
        40,     # blkio_delay_total
        48,     # swapin_count
        56,     # swapin_delay_total
        64,     # cpu_run_real_total
        72,     # cpu_run_virtual_total
        80,     # ac_comm
        112,    # ac_sched
        113,    # ac_pad
        120,    # ac_uid
        124,    # ac_gid
        128,    # ac_pid
        132,    # ac_ppid
        136,    # ac_btime
        144,    # ac_etime
        152,    # ac_utime
        160,    # ac_stime
        168,    # ac_minflt
        176,    # ac_majflt
        184,    # coremem
        192,    # virtmem
        200,    # hiwater_rss
        208,    # hiwater_vm
        216,    # read_char
        224,    # write_char
        232,    # read_syscalls
        240,    # write_syscalls
        248,    # read_bytes
        256,    # write_bytes
        264,    # cancelled_write_bytes
    );
Offsets of taskstats' members (64 bit kernel, 32 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        16,     # cpu_count
        24,     # cpu_delay_total
        32,     # blkio_count
        40,     # blkio_delay_total
        48,     # swapin_count
        56,     # swapin_delay_total
        64,     # cpu_run_real_total
        72,     # cpu_run_virtual_total
        80,     # ac_comm
        112,    # ac_sched
        113,    # ac_pad
        120,    # ac_uid
        124,    # ac_gid
        128,    # ac_pid
        132,    # ac_ppid
        136,    # ac_btime
        144,    # ac_etime
        152,    # ac_utime
        160,    # ac_stime
        168,    # ac_minflt
        176,    # ac_majflt
        184,    # coremem
        192,    # virtmem
        200,    # hiwater_rss
        208,    # hiwater_vm
        216,    # read_char
        224,    # write_char
        232,    # read_syscalls
        240,    # write_syscalls
        248,    # read_bytes
        256,    # write_bytes
        264,    # cancelled_write_bytes
    );
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Jay Lan <jlan@engr.sgi.com>
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
											
										 
										
											2007-04-23 14:41:05 -07:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									__u8	ac_sched __attribute__((aligned(8)));
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
													/* Scheduling discipline */
							 | 
						
					
						
							
								
									
										
										
										
											2006-09-30 23:28:55 -07:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									__u8	ac_pad[3];
							 | 
						
					
						
							
								
									
										
											 
										 
										
											
												Taskstats fix the structure members alignment issue
We broke the the alignment of members of taskstats to the 8 byte boundary
with the CSA patches.  In the current kernel, the taskstats structure is
not suitable for use by 32 bit applications in a 64 bit kernel.
On x86_64
Offsets of taskstats' members (64 bit kernel, 64 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        16,     # cpu_count
        24,     # cpu_delay_total
        32,     # blkio_count
        40,     # blkio_delay_total
        48,     # swapin_count
        56,     # swapin_delay_total
        64,     # cpu_run_real_total
        72,     # cpu_run_virtual_total
        80,     # ac_comm
        112,    # ac_sched
        113,    # ac_pad
        116,    # ac_uid
        120,    # ac_gid
        124,    # ac_pid
        128,    # ac_ppid
        132,    # ac_btime
        136,    # ac_etime
        144,    # ac_utime
        152,    # ac_stime
        160,    # ac_minflt
        168,    # ac_majflt
        176,    # coremem
        184,    # virtmem
        192,    # hiwater_rss
        200,    # hiwater_vm
        208,    # read_char
        216,    # write_char
        224,    # read_syscalls
        232,    # write_syscalls
        240,    # read_bytes
        248,    # write_bytes
        256,    # cancelled_write_bytes
    );
Offsets of taskstats' members (64 bit kernel, 32 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        12,     # cpu_count
        20,     # cpu_delay_total
        28,     # blkio_count
        36,     # blkio_delay_total
        44,     # swapin_count
        52,     # swapin_delay_total
        60,     # cpu_run_real_total
        68,     # cpu_run_virtual_total
        76,     # ac_comm
        108,    # ac_sched
        109,    # ac_pad
        112,    # ac_uid
        116,    # ac_gid
        120,    # ac_pid
        124,    # ac_ppid
        128,    # ac_btime
        132,    # ac_etime
        140,    # ac_utime
        148,    # ac_stime
        156,    # ac_minflt
        164,    # ac_majflt
        172,    # coremem
        180,    # virtmem
        188,    # hiwater_rss
        196,    # hiwater_vm
        204,    # read_char
        212,    # write_char
        220,    # read_syscalls
        228,    # write_syscalls
        236,    # read_bytes
        244,    # write_bytes
        252,    # cancelled_write_bytes
    );
This is one way to solve the problem without re-arranging structure members
is to pack the structure.  The patch adds an __attribute__((aligned(8))) to
the taskstats structure members so that 32 bit applications using taskstats
can work with a 64 bit kernel.
Using __attribute__((packed)) would break the 64 bit alignment of members.
The fix was tested on x86_64. After the fix, we got
Offsets of taskstats' members (64 bit kernel, 64 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        16,     # cpu_count
        24,     # cpu_delay_total
        32,     # blkio_count
        40,     # blkio_delay_total
        48,     # swapin_count
        56,     # swapin_delay_total
        64,     # cpu_run_real_total
        72,     # cpu_run_virtual_total
        80,     # ac_comm
        112,    # ac_sched
        113,    # ac_pad
        120,    # ac_uid
        124,    # ac_gid
        128,    # ac_pid
        132,    # ac_ppid
        136,    # ac_btime
        144,    # ac_etime
        152,    # ac_utime
        160,    # ac_stime
        168,    # ac_minflt
        176,    # ac_majflt
        184,    # coremem
        192,    # virtmem
        200,    # hiwater_rss
        208,    # hiwater_vm
        216,    # read_char
        224,    # write_char
        232,    # read_syscalls
        240,    # write_syscalls
        248,    # read_bytes
        256,    # write_bytes
        264,    # cancelled_write_bytes
    );
Offsets of taskstats' members (64 bit kernel, 32 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        16,     # cpu_count
        24,     # cpu_delay_total
        32,     # blkio_count
        40,     # blkio_delay_total
        48,     # swapin_count
        56,     # swapin_delay_total
        64,     # cpu_run_real_total
        72,     # cpu_run_virtual_total
        80,     # ac_comm
        112,    # ac_sched
        113,    # ac_pad
        120,    # ac_uid
        124,    # ac_gid
        128,    # ac_pid
        132,    # ac_ppid
        136,    # ac_btime
        144,    # ac_etime
        152,    # ac_utime
        160,    # ac_stime
        168,    # ac_minflt
        176,    # ac_majflt
        184,    # coremem
        192,    # virtmem
        200,    # hiwater_rss
        208,    # hiwater_vm
        216,    # read_char
        224,    # write_char
        232,    # read_syscalls
        240,    # write_syscalls
        248,    # read_bytes
        256,    # write_bytes
        264,    # cancelled_write_bytes
    );
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Jay Lan <jlan@engr.sgi.com>
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
											
										 
										
											2007-04-23 14:41:05 -07:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									__u32	ac_uid __attribute__((aligned(8)));
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
													/* User ID */
							 | 
						
					
						
							
								
									
										
										
										
											2006-09-30 23:28:55 -07:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									__u32	ac_gid;			/* Group ID */
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									__u32	ac_pid;			/* Process ID */
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									__u32	ac_ppid;		/* Parent process ID */
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									__u32	ac_btime;		/* Begin time [sec since 1970] */
							 | 
						
					
						
							
								
									
										
											 
										 
										
											
												Taskstats fix the structure members alignment issue
We broke the the alignment of members of taskstats to the 8 byte boundary
with the CSA patches.  In the current kernel, the taskstats structure is
not suitable for use by 32 bit applications in a 64 bit kernel.
On x86_64
Offsets of taskstats' members (64 bit kernel, 64 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        16,     # cpu_count
        24,     # cpu_delay_total
        32,     # blkio_count
        40,     # blkio_delay_total
        48,     # swapin_count
        56,     # swapin_delay_total
        64,     # cpu_run_real_total
        72,     # cpu_run_virtual_total
        80,     # ac_comm
        112,    # ac_sched
        113,    # ac_pad
        116,    # ac_uid
        120,    # ac_gid
        124,    # ac_pid
        128,    # ac_ppid
        132,    # ac_btime
        136,    # ac_etime
        144,    # ac_utime
        152,    # ac_stime
        160,    # ac_minflt
        168,    # ac_majflt
        176,    # coremem
        184,    # virtmem
        192,    # hiwater_rss
        200,    # hiwater_vm
        208,    # read_char
        216,    # write_char
        224,    # read_syscalls
        232,    # write_syscalls
        240,    # read_bytes
        248,    # write_bytes
        256,    # cancelled_write_bytes
    );
Offsets of taskstats' members (64 bit kernel, 32 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        12,     # cpu_count
        20,     # cpu_delay_total
        28,     # blkio_count
        36,     # blkio_delay_total
        44,     # swapin_count
        52,     # swapin_delay_total
        60,     # cpu_run_real_total
        68,     # cpu_run_virtual_total
        76,     # ac_comm
        108,    # ac_sched
        109,    # ac_pad
        112,    # ac_uid
        116,    # ac_gid
        120,    # ac_pid
        124,    # ac_ppid
        128,    # ac_btime
        132,    # ac_etime
        140,    # ac_utime
        148,    # ac_stime
        156,    # ac_minflt
        164,    # ac_majflt
        172,    # coremem
        180,    # virtmem
        188,    # hiwater_rss
        196,    # hiwater_vm
        204,    # read_char
        212,    # write_char
        220,    # read_syscalls
        228,    # write_syscalls
        236,    # read_bytes
        244,    # write_bytes
        252,    # cancelled_write_bytes
    );
This is one way to solve the problem without re-arranging structure members
is to pack the structure.  The patch adds an __attribute__((aligned(8))) to
the taskstats structure members so that 32 bit applications using taskstats
can work with a 64 bit kernel.
Using __attribute__((packed)) would break the 64 bit alignment of members.
The fix was tested on x86_64. After the fix, we got
Offsets of taskstats' members (64 bit kernel, 64 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        16,     # cpu_count
        24,     # cpu_delay_total
        32,     # blkio_count
        40,     # blkio_delay_total
        48,     # swapin_count
        56,     # swapin_delay_total
        64,     # cpu_run_real_total
        72,     # cpu_run_virtual_total
        80,     # ac_comm
        112,    # ac_sched
        113,    # ac_pad
        120,    # ac_uid
        124,    # ac_gid
        128,    # ac_pid
        132,    # ac_ppid
        136,    # ac_btime
        144,    # ac_etime
        152,    # ac_utime
        160,    # ac_stime
        168,    # ac_minflt
        176,    # ac_majflt
        184,    # coremem
        192,    # virtmem
        200,    # hiwater_rss
        208,    # hiwater_vm
        216,    # read_char
        224,    # write_char
        232,    # read_syscalls
        240,    # write_syscalls
        248,    # read_bytes
        256,    # write_bytes
        264,    # cancelled_write_bytes
    );
Offsets of taskstats' members (64 bit kernel, 32 bit application)
@taskstats'offsetof[@taskstats'indices] = (
        0,      # version
        4,      # ac_exitcode
        8,      # ac_flag
        9,      # ac_nice
        16,     # cpu_count
        24,     # cpu_delay_total
        32,     # blkio_count
        40,     # blkio_delay_total
        48,     # swapin_count
        56,     # swapin_delay_total
        64,     # cpu_run_real_total
        72,     # cpu_run_virtual_total
        80,     # ac_comm
        112,    # ac_sched
        113,    # ac_pad
        120,    # ac_uid
        124,    # ac_gid
        128,    # ac_pid
        132,    # ac_ppid
        136,    # ac_btime
        144,    # ac_etime
        152,    # ac_utime
        160,    # ac_stime
        168,    # ac_minflt
        176,    # ac_majflt
        184,    # coremem
        192,    # virtmem
        200,    # hiwater_rss
        208,    # hiwater_vm
        216,    # read_char
        224,    # write_char
        232,    # read_syscalls
        240,    # write_syscalls
        248,    # read_bytes
        256,    # write_bytes
        264,    # cancelled_write_bytes
    );
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Jay Lan <jlan@engr.sgi.com>
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
											
										 
										
											2007-04-23 14:41:05 -07:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									__u64	ac_etime __attribute__((aligned(8)));
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
													/* Elapsed time [usec] */
							 | 
						
					
						
							
								
									
										
										
										
											2006-09-30 23:28:55 -07:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									__u64	ac_utime;		/* User CPU time [usec] */
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									__u64	ac_stime;		/* SYstem CPU time [usec] */
							 | 
						
					
						
							
								
									
										
										
										
											2006-09-30 23:29:00 -07:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									__u64	ac_minflt;		/* Minor Page Fault Count */
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									__u64	ac_majflt;		/* Major Page Fault Count */
							 | 
						
					
						
							
								
									
										
										
										
											2006-09-30 23:28:55 -07:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									/* Basic Accounting Fields end */
							 | 
						
					
						
							
								
									
										
										
										
											2006-09-30 23:28:58 -07:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
								
							 | 
						
					
						
							
								
									
										
										
										
											2006-12-10 02:19:50 -08:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									/* Extended accounting fields start */
							 | 
						
					
						
							
								
									
										
										
										
											2006-09-30 23:29:00 -07:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									/* Accumulated RSS usage in duration of a task, in MBytes-usecs.
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									 * The current rss usage is added to this counter every time
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									 * a tick is charged to a task's system time. So, at the end we
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									 * will have memory usage multiplied by system time. Thus an
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									 * average usage per system time unit can be calculated.
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									 */
							 | 
						
					
						
							
								
									
										
										
										
											2006-12-10 02:19:50 -08:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									__u64	coremem;		/* accumulated RSS usage in MB-usec */
							 | 
						
					
						
							
								
									
										
										
										
											2006-09-30 23:29:00 -07:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									/* Accumulated virtual memory usage in duration of a task.
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									 * Same as acct_rss_mem1 above except that we keep track of VM usage.
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									 */
							 | 
						
					
						
							
								
									
										
										
										
											2006-12-10 02:19:50 -08:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									__u64	virtmem;		/* accumulated VM  usage in MB-usec */
							 | 
						
					
						
							
								
									
										
										
										
											2006-09-30 23:29:00 -07:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
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							| 
								
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							 | 
							
							
									/* High watermark of RSS and virtual memory usage in duration of
							 | 
						
					
						
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							 | 
							
							
									 * a task, in KBytes.
							 | 
						
					
						
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							 | 
							
								
							 | 
							
							
									 */
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											2006-12-10 02:19:50 -08:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									__u64	hiwater_rss;		/* High-watermark of RSS usage, in KB */
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									__u64	hiwater_vm;		/* High-water VM usage, in KB */
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											2006-09-30 23:29:00 -07:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
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									/* The following four fields are I/O statistics of a task. */
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											2006-12-10 02:19:50 -08:00
										 
									 
								 
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							 | 
							
								
							 | 
							
							
									__u64	read_char;		/* bytes read */
							 | 
						
					
						
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							 | 
							
							
									__u64	write_char;		/* bytes written */
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							 | 
							
							
									__u64	read_syscalls;		/* read syscalls */
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							 | 
							
							
									__u64	write_syscalls;		/* write syscalls */
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							 | 
							
							
									/* Extended accounting fields end */
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											2006-12-10 02:19:53 -08:00
										 
									 
								 
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								#define TASKSTATS_HAS_IO_ACCOUNTING
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									/* Per-task storage I/O accounting starts */
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									__u64	read_bytes;		/* bytes of read I/O */
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							 | 
							
							
									__u64	write_bytes;		/* bytes of write I/O */
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							 | 
							
								
							 | 
							
								
							 | 
							
							
									__u64	cancelled_write_bytes;	/* bytes of cancelled write I/O */
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											2007-07-15 23:40:48 -07:00
										 
									 
								 
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									__u64  nvcsw;			/* voluntary_ctxt_switches */
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									__u64  nivcsw;			/* nonvoluntary_ctxt_switches */
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											2007-10-18 03:06:35 -07:00
										 
									 
								 
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									/* time accounting for SMT machines */
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							 | 
							
							
									__u64	ac_utimescaled;		/* utime scaled on frequency etc */
							 | 
						
					
						
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							 | 
							
								
							 | 
							
								
							 | 
							
							
									__u64	ac_stimescaled;		/* stime scaled on frequency etc */
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									__u64	cpu_scaled_run_real_total; /* scaled cpu_run_real_total */
							 | 
						
					
						
							
								
									
										
										
										
											2008-07-25 01:48:53 -07:00
										 
									 
								 
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									/* Delay waiting for memory reclaim */
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							 | 
							
								
							 | 
							
								
							 | 
							
							
									__u64	freepages_count;
							 | 
						
					
						
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							 | 
							
								
							 | 
							
							
									__u64	freepages_delay_total;
							 | 
						
					
						
							
								
									
										
										
										
											2006-07-14 00:24:40 -07:00
										 
									 
								 
							 | 
							
								
							 | 
							
								
							 | 
							
							
								};
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							 | 
							
							
								/*
							 | 
						
					
						
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							 | 
							
							
								 * Commands sent from userspace
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							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
								 * Not versioned. New commands should only be inserted at the enum's end
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
								 * prior to __TASKSTATS_CMD_MAX
							 | 
						
					
						
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							 | 
							
								
							 | 
							
							
								 */
							 | 
						
					
						
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								enum {
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							 | 
							
								
							 | 
							
							
									TASKSTATS_CMD_UNSPEC = 0,	/* Reserved */
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									TASKSTATS_CMD_GET,		/* user->kernel request/get-response */
							 | 
						
					
						
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							 | 
							
								
							 | 
							
								
							 | 
							
							
									TASKSTATS_CMD_NEW,		/* kernel->user event */
							 | 
						
					
						
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							 | 
							
								
							 | 
							
								
							 | 
							
							
									__TASKSTATS_CMD_MAX,
							 | 
						
					
						
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							 | 
							
								
							 | 
							
							
								};
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								#define TASKSTATS_CMD_MAX (__TASKSTATS_CMD_MAX - 1)
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								enum {
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							 | 
							
							
									TASKSTATS_TYPE_UNSPEC = 0,	/* Reserved */
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									TASKSTATS_TYPE_PID,		/* Process id */
							 | 
						
					
						
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							 | 
							
								
							 | 
							
							
									TASKSTATS_TYPE_TGID,		/* Thread group id */
							 | 
						
					
						
							| 
								
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							 | 
							
								
							 | 
							
							
									TASKSTATS_TYPE_STATS,		/* taskstats structure */
							 | 
						
					
						
							| 
								
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							 | 
							
								
							 | 
							
							
									TASKSTATS_TYPE_AGGR_PID,	/* contains pid + stats */
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									TASKSTATS_TYPE_AGGR_TGID,	/* contains tgid + stats */
							 | 
						
					
						
							
								
									
										
										
										
											2010-12-21 17:24:30 -08:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									TASKSTATS_TYPE_NULL,		/* contains nothing */
							 | 
						
					
						
							
								
									
										
										
										
											2006-07-14 00:24:40 -07:00
										 
									 
								 
							 | 
							
								
							 | 
							
								
							 | 
							
							
									__TASKSTATS_TYPE_MAX,
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
								};
							 | 
						
					
						
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							 | 
							
							
								#define TASKSTATS_TYPE_MAX (__TASKSTATS_TYPE_MAX - 1)
							 | 
						
					
						
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								enum {
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							 | 
							
								
							 | 
							
							
									TASKSTATS_CMD_ATTR_UNSPEC = 0,
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									TASKSTATS_CMD_ATTR_PID,
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									TASKSTATS_CMD_ATTR_TGID,
							 | 
						
					
						
							
								
									
										
										
										
											2006-07-14 00:24:47 -07:00
										 
									 
								 
							 | 
							
								
									
										
									
								
							 | 
							
								
							 | 
							
							
									TASKSTATS_CMD_ATTR_REGISTER_CPUMASK,
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
									TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK,
							 | 
						
					
						
							
								
									
										
										
										
											2006-07-14 00:24:40 -07:00
										 
									 
								 
							 | 
							
								
							 | 
							
								
							 | 
							
							
									__TASKSTATS_CMD_ATTR_MAX,
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
								};
							 | 
						
					
						
							| 
								
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							| 
								
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							 | 
							
							
								#define TASKSTATS_CMD_ATTR_MAX (__TASKSTATS_CMD_ATTR_MAX - 1)
							 | 
						
					
						
							| 
								
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							 | 
							
							
								
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
								/* NETLINK_GENERIC related info */
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
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							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
								#define TASKSTATS_GENL_NAME	"TASKSTATS"
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
								#define TASKSTATS_GENL_VERSION	0x1
							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
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							 | 
						
					
						
							| 
								
							 | 
							
								
							 | 
							
								
							 | 
							
							
								#endif /* _LINUX_TASKSTATS_H */
							 |