This skips the _mapcount mangling for slab and hugetlbfs pages.
The main trouble in doing this is to guarantee that PageSlab and
PageHeadHuge remains constant for all get_page/put_page run on the tail
of slab or hugetlbfs compound pages. Otherwise if they're set during
get_page but not set during put_page, the _mapcount of the tail page
would underflow.
PageHeadHuge will remain true until the compound page is released and
enters the buddy allocator so it won't risk to change even if the tail
page is the last reference left on the page.
PG_slab instead is cleared before the slab frees the head page with
put_page, so if the tail pin is released after the slab freed the page,
we would have a problem. But in the slab case the tail pin cannot be
the last reference left on the page. This is because the slab code is
free to reuse the compound page after a kfree/kmem_cache_free without
having to check if there's any tail pin left. In turn all tail pins
must be always released while the head is still pinned by the slab code
and so we know PG_slab will be still set too.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Pravin Shelar <pshelar@nicira.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ben Hutchings <bhutchings@solarflare.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Currently we don't clobber page_tail->first_page during split_huge_page,
so compound_trans_head can be set to compound_head without adverse
effects, and this mostly optimizes away a smp_rmb.
It looks worthwhile to keep around the implementation that doesn't relay
on page_tail->first_page not to be clobbered, because it would be
necessary if we'll decide to enforce page->private to zero at all times
whenever PG_private is not set, also for anonymous pages. For anonymous
pages enforcing such an invariant doesn't matter as anonymous pages
don't use page->private so we can get away with this microoptimization.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Pravin Shelar <pshelar@nicira.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ben Hutchings <bhutchings@solarflare.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We don't actually need a reference on the head page in the slab and
hugetlbfs paths, as long as we add a smp_rmb() which should be faster
than get_page_unless_zero.
[akpm@linux-foundation.org: fix typo in comment]
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Pravin Shelar <pshelar@nicira.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ben Hutchings <bhutchings@solarflare.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
get_page_foll() is more optimal and is always safe to use under the PT
lock. More so for hugetlbfs as there's no risk of race conditions with
split_huge_page regardless of the PT lock.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Tested-by: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Pravin Shelar <pshelar@nicira.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ben Hutchings <bhutchings@solarflare.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dave Jiang reported that he was seeing oopses when running NUMA systems
and default_hugepagesz=1G. I traced the issue down to
migrate_page_copy() trying to use the same code for hugetlb pages and
transparent hugepages. It should not have been trying to pass thp pages
in there.
So, add some VM_BUG_ON()s for the next hapless VM developer that tries
the same thing.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Tested-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
{,set}page_address() are macros if WANT_PAGE_VIRTUAL. If
!WANT_PAGE_VIRTUAL, they're plain C functions.
If someone calls them with a void *, this pointer is auto-converted to
struct page * if !WANT_PAGE_VIRTUAL, but causes a build failure on
architectures using WANT_PAGE_VIRTUAL (arc, m68k and sparc64):
drivers/md/bcache/bset.c: In function `__btree_sort':
drivers/md/bcache/bset.c:1190: warning: dereferencing `void *' pointer
drivers/md/bcache/bset.c:1190: error: request for member `virtual' in something not a structure or union
Convert them to static inline functions to fix this. There are already
plenty of users of struct page members inside <linux/mm.h>, so there's
no reason to keep them as macros.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The ramfs is always built in. It will never be modular, so using
module_init as an alias for __initcall is rather misleading.
Fix this up now, so that we can relocate module_init from init.h into
module.h in the future. If we don't do this, we'd have to add module.h
to obviously non-modular code, and that would be a worse thing.
Note that direct use of __initcall is discouraged, vs. one of the
priority categorized subgroups. As __initcall gets mapped onto
device_initcall, our use of fs_initcall (which makes sense for fs code)
will thus change this registration from level 6-device to level 5-fs
(i.e. slightly earlier). However no observable impact of that small
difference has been observed during testing, or is expected.
Also note that this change uncovers a missing semicolon bug in the
registration of the initcall.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
On fail path alloc_super() calls destroy_super(), which issues a warning
if the sb's s_mounts list is not empty, in particular if it has not been
initialized. That said s_mounts must be initialized in alloc_super()
before any possible failure, but currently it is initialized close to
the end of the function leading to a useless warning dumped to log if
either percpu_counter_init() or list_lru_init() fails. Let's fix this.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The compat_do_readv_writev() function was doing a verify_area on the
incoming iov, but the nr_segs value is not checked. If someone passes
in a -1 for nr_segs, for instance, the function should return an EINVAL.
However, it returns a EFAULT because the verify_area fails because it is
checking an array of size MAX_UINT. The check is bogus, anyway, because
the next check, compat_rw_copy_check_uvector(), will do all the
necessary checking, anyway. The non-compat do_readv_writev() function
doesn't do this check, so I think it's safe to just remove the code.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We cap "nmsgs" at I2C_RDRW_IOCTL_MAX_MSGS (42) but the current code
allows negative values. It's harmless but it makes my static checker
upset so I've made nsmgs unsigned.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Uninline vast tracts of nested inline functions in
include/linux/posix_acl.h.
This reduces the text+data+bss size of x86_64 allyesconfig vmlinux by
8026 bytes.
The patch also regularises the positioning of the EXPORT_SYMBOLs in
posix_acl.c.
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: J. Bruce Fields <bfields@fieldses.org>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Tested-by: Benny Halevy <bhalevy@primarydata.com>
Cc: Benny Halevy <bhalevy@panasas.com>
Cc: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/sh/kernel/kgdb.c: In function 'sleeping_thread_to_gdb_regs':
arch/sh/kernel/kgdb.c:225:32: error: implicit declaration of function 'task_stack_page' [-Werror=implicit-function-declaration]
arch/sh/kernel/kgdb.c:242:23: error: dereferencing pointer to incomplete type
arch/sh/kernel/kgdb.c:243:22: error: dereferencing pointer to incomplete type
arch/sh/kernel/kgdb.c: In function 'singlestep_trap_handler':
arch/sh/kernel/kgdb.c:310:27: error: 'SIGTRAP' undeclared (first use in this function)
arch/sh/kernel/kgdb.c:310:27: note: each undeclared identifier is reported only once for each function it appears in
This was introduced by commit 16559ae48c ("kgdb: remove #include
<linux/serial_8250.h> from kgdb.h").
[geert@linux-m68k.org: reworded and reformatted]
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 nodes cluster, say Node A and Node B, mount the same ocfs2 volume, and
create a file 1.
Node A Node B
open 1, get open lock
rm 1, and then add 1 to orphan_dir
storage link down,
o2hb_write_timeout
->o2quo_disk_timeout
->emergency_restart
at the moment, Node B dismount and do
ocfs2rec simultaneously
1) ocfs2_dismount_volume
->ocfs2_recovery_exit
->wait_event(osb->recovery_event)
->flush_workqueue(ocfs2_wq)
2) ocfs2rec
->queue_work(&journal->j_recovery_work)
->ocfs2_recover_orphans
->ocfs2_commit_truncate
->queue_delayed_work(&osb->osb_truncate_log_wq)
In ocfs2_recovery_exit, it flushes workqueue and then releases system
inodes. When doing ocfs2rec, it will call ocfs2_flush_truncate_log
which will try to get sys_root_inode, and NULL pointer dereference
occurs.
Signed-off-by: Yiwen Jiang <jiangyiwen@huawei.com>
Signed-off-by: joyce <xuejiufei@huawei.com>
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
An unreserve space ioctl OCFS2_IOC_UNRESVSP/64 should reject a negative
length.
Orabug:14789508
Signed-off-by: Tariq Saseed <tariq.x.saeed@oracle.com>
Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fixes the following sparse warning:
fs/ocfs2/stack_user.c:930:32: warning:
symbol 'ocfs2_ls_ops' was not declared. Should it be static?
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Adjust minlen with discard_granularity for FITRIM ioctl(2) if the given
minimum size in bytes is less than it because, discard granularity is
used to tell us that the minimum size of extent that can be discarded by
the storage device.
This is inspired by ext4 commit 5c2ed62fd4 ("ext4: Adjust minlen with
discard_granularity in the FITRIM ioctl") from Lukas Czerner.
Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
For FITRIM ioctl(2), we should not keep silence if the given range
length ls less than a block size as there is no data blocks would be
discareded. Hence it should return EINVAL instead. This issue can be
verified via xfstests/generic/288 which is used for FITRIM argument
handling tests.
Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
For FITRIM ioctl(2), we should return EOPNOTSUPP to inform the user that
the storage device does not support discard if it is, otherwise return
success would confuse the user even though there is no free blocks were
trimmed at all.
Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
ocfs2_alloc_dinode_update_counts() and ocfs2_block_group_set_bits() are
already provided in suballoc.c. So, the same functions in
move_extents.c are not needed any more.
Declare the functions in suballoc.h and remove redundant functions in
move_extents.c.
Signed-off-by: Younger Liu <liuyiyang@hisense.com>
Cc: Younger Liu <younger.liucn@gmail.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Attempt to use the new DLM operations. If it is not supported, use the
traditional ocfs2_controld.
To exchange ocfs2 versioning, we use the LVB of the version dlm lock.
It first attempts to take the lock in EX mode (non-blocking). If
successful (which means it is the first mount), it writes the version
number and downconverts to PR lock. If it is unsuccessful, it reads the
version from the lock.
If this becomes the standard (with o2cb as well), it could simplify
userspace tools to check if the filesystem is mounted on other nodes.
Dan: Since ocfs2_protocol_version are two u8 values, the additional
checks with LONG* don't make sense.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Use the native DLM locks for version control negotiation. Most of the
framework is taken from gfs2/lock_dlm.c
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This is done to differentiate between using and not using controld and
use the connection information accordingly.
We need to be backward compatible. So, we use a new enum
ocfs2_connection_type to identify when controld is used and when it is
not.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We perform this because the DLM recovery callbacks will require the
ocfs2_live_connection structure to record the node information when
dlm_new_lockspace() is updated (in the last patch of the series).
Before calling dlm_new_lockspace(), we need the structure ready for the
.recover_done() callback, which would set oc_this_node. This is the
reason we allocate ocfs2_live_connection beforehand in user_connect().
[AKPM] rc initialization is not required because it assigned in case of
errors. It will be cleared by compiler anyways.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reveiwed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
These are the callbacks called by the fs/dlm code in case the membership
changes. If there is a failure while/during calling any of these, the
DLM creates a new membership and relays to the rest of the nodes.
- recover_prep() is called when DLM understands a node is down.
- recover_slot() is called once all nodes have acknowledged
recover_prep and recovery can begin.
- recover_done() is called once the recovery is complete. It returns
the new membership.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This is an effort of removing ocfs2_controld.pcmk and getting ocfs2 DLM
handling up to the times with respect to DLM (>=4.0.1) and corosync
(2.3.x). AFAIK, cman also is being phased out for a unified corosync
cluster stack.
fs/dlm performs all the functions with respect to fencing and node
management and provides the API's to do so for ocfs2. For all future
references, DLM stands for fs/dlm code.
The advantages are:
+ No need to run an additional userspace daemon (ocfs2_controld)
+ No controld device handling and controld protocol
+ Shifting responsibilities of node management to DLM layer
For backward compatibility, we are keeping the controld handling code.
Once enough time has passed we can remove a significant portion of the
code. This was tested by using the kernel with changes on older
unmodified tools. The kernel used ocfs2_controld as expected, and
displayed the appropriate warning message.
This feature requires modification in the userspace ocfs2-tools. The
changes can be found at: https://github.com/goldwynr/ocfs2-tools branch:
nocontrold Currently, not many checks are present in the userspace code,
but that would change soon.
This patch (of 6):
Add clustername to cluster connection.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The versioning information is confusing for end-users. The numbers are
stuck at 1.5.0 when the tools version have moved to 1.8.2. Remove the
versioning system in the OCFS2 modules and let the kernel version be the
guide to debug issues.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Acked-by: Sunil Mushran <sunil.mushran@gmail.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 5fbbf8a1a9 ("Score: The commit is for compiling successfully.")
re-introduced "select HAVE_GENERIC_HARDIRQS" in v3.12-rc4, which had
just been removed in v3.12-rc1 by 0244ad004a ("Remove GENERIC_HARDIRQ
config option").
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Chen Liqin <liqin.linux@gmail.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
dma_pte_free_level() has an off-by-one error when checking whether a pte
is completely covered by a range. Take for example the case of
attempting to free pfn 0x0 - 0x1ff, ie. 512 entries covering the first
2M superpage.
The level_size() is 0x200 and we test:
static void dma_pte_free_level(...
...
if (!(0 > 0 || 0x1ff < 0 + 0x200)) {
...
}
Clearly the 2nd test is true, which means we fail to take the branch to
clear and free the pagetable entry. As a result, we're leaking
pagetables and failing to install new pages over the range.
This was found with a PCI device assigned to a QEMU guest using vfio-pci
without a VGA device present. The first 1M of guest address space is
mapped with various combinations of 4K pages, but eventually the range
is entirely freed and replaced with a 2M contiguous mapping.
intel-iommu errors out with something like:
ERROR: DMA PTE for vPFN 0x0 already set (to 5c2b8003 not 849c00083)
In this case 5c2b8003 is the pointer to the previous leaf page that was
neither freed nor cleared and 849c00083 is the superpage entry that
we're trying to replace it with.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We usually rely on the fact that struct members not specified in the
initializer are set to NULL. So do that with fsnotify function pointers
as well.
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Eric Paris <eparis@parisplace.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
After removing event structure creation from the generic layer there is
no reason for separate .should_send_event and .handle_event callbacks.
So just remove the first one.
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Eric Paris <eparis@parisplace.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Currently fsnotify framework creates one event structure for each
notification event and links this event into all interested notification
groups. This is done so that we save memory when several notification
groups are interested in the event. However the need for event
structure shared between inotify & fanotify bloats the event structure
so the result is often higher memory consumption.
Another problem is that fsnotify framework keeps path references with
outstanding events so that fanotify can return open file descriptors
with its events. This has the undesirable effect that filesystem cannot
be unmounted while there are outstanding events - a regression for
inotify compared to a situation before it was converted to fsnotify
framework. For fanotify this problem is hard to avoid and users of
fanotify should kind of expect this behavior when they ask for file
descriptors from notified files.
This patch changes fsnotify and its users to create separate event
structure for each group. This allows for much simpler code (~400 lines
removed by this patch) and also smaller event structures. For example
on 64-bit system original struct fsnotify_event consumes 120 bytes, plus
additional space for file name, additional 24 bytes for second and each
subsequent group linking the event, and additional 32 bytes for each
inotify group for private data. After the conversion inotify event
consumes 48 bytes plus space for file name which is considerably less
memory unless file names are long and there are several groups
interested in the events (both of which are uncommon). Fanotify event
fits in 56 bytes after the conversion (fanotify doesn't care about file
names so its events don't have to have it allocated). A win unless
there are four or more fanotify groups interested in the event.
The conversion also solves the problem with unmount when only inotify is
used as we don't have to grab path references for inotify events.
[hughd@google.com: fanotify: fix corruption preventing startup]
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Eric Paris <eparis@parisplace.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Rounding of name length when passing it to userspace was done in several
places. Provide a function to do it and use it in all places.
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Eric Paris <eparis@parisplace.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Record actively mapped pages and provide an api for asserting a given
page is dma inactive before execution proceeds. Placing
debug_dma_assert_idle() in cow_user_page() flagged the violation of the
dma-api in the NET_DMA implementation (see commit 7787380336 "net_dma:
mark broken").
The implementation includes the capability to count, in a limited way,
repeat mappings of the same page that occur without an intervening
unmap. This 'overlap' counter is limited to the few bits of tag space
in a radix tree. This mechanism is added to mitigate false negative
cases where, for example, a page is dma mapped twice and
debug_dma_assert_idle() is called after the page is un-mapped once.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Shradha Shah says:
====================
Bug Fixes for SFC driver
I am taking over the upstream patch submission work for the
sfc driver from Ben Hutchings.
These patches are bug fixes to the sfc driver involving
replacement of the PORT RESET MC command and fixing transposed
ptp_{under,over}size_sync_window_statistics
The PORT_RESET bug fix is needed for all versions supporting EF10
i.e all versions including and after 3.12.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Somehow I transposed these two while bringing the original statistics
support upstream.
Fixes: 99691c4ac1 ('sfc: Add PTP counters to ethtool stats')
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
PORT_RESET MC command was NOP in the ef10 firmware hence we are using
ENTITY_RESET to make sure all resource allocations are reset.
Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
So that we will not expose struct tcf_common to modules.
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Every action ops has a pointer to hash info, so we don't need to
hard-code it in each module.
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
cond_resched_lock(cinfo->lock) is called everywhere else while holding
the cinfo->lock spinlock. Not holding this lock while calling
transfer_commit_list in filelayout_recover_commit_reqs causes the BUG
below.
It's true that we can't hold this lock while calling pnfs_put_lseg,
because that might try to lock the inode lock - which might be the
same lock as cinfo->lock.
To reproduce, mount a 2 DS pynfs server and run an O_DIRECT command
that crosses a stripe boundary and is not page aligned, such as:
dd if=/dev/zero of=/mnt/f bs=17000 count=1 oflag=direct
BUG: sleeping function called from invalid context at linux/fs/nfs/nfs4filelayout.c:1161
in_atomic(): 0, irqs_disabled(): 0, pid: 27, name: kworker/0:1
2 locks held by kworker/0:1/27:
#0: (events){.+.+.+}, at: [<ffffffff810501d7>] process_one_work+0x175/0x3a5
#1: ((&dreq->work)){+.+...}, at: [<ffffffff810501d7>] process_one_work+0x175/0x3a5
CPU: 0 PID: 27 Comm: kworker/0:1 Not tainted 3.13.0-rc3-branch-dros_testing+ #21
Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/31/2013
Workqueue: events nfs_direct_write_schedule_work [nfs]
0000000000000000 ffff88007a39bbb8 ffffffff81491256 ffff88007b87a130 ffff88007a39bbd8 ffffffff8105f103 ffff880079614000 ffff880079617d40 ffff88007a39bc20 ffffffffa011603e ffff880078988b98 0000000000000000
Call Trace:
[<ffffffff81491256>] dump_stack+0x4d/0x66
[<ffffffff8105f103>] __might_sleep+0x100/0x105
[<ffffffffa011603e>] transfer_commit_list+0x94/0xf1 [nfs_layout_nfsv41_files]
[<ffffffffa01160d6>] filelayout_recover_commit_reqs+0x3b/0x68 [nfs_layout_nfsv41_files]
[<ffffffffa00ba53a>] nfs_direct_write_reschedule+0x9f/0x1d6 [nfs]
[<ffffffff810705df>] ? mark_lock+0x1df/0x224
[<ffffffff8106e617>] ? trace_hardirqs_off_caller+0x37/0xa4
[<ffffffff8106e691>] ? trace_hardirqs_off+0xd/0xf
[<ffffffffa00ba8f8>] nfs_direct_write_schedule_work+0x9d/0xb7 [nfs]
[<ffffffff810501d7>] ? process_one_work+0x175/0x3a5
[<ffffffff81050258>] process_one_work+0x1f6/0x3a5
[<ffffffff810501d7>] ? process_one_work+0x175/0x3a5
[<ffffffff8105187e>] worker_thread+0x149/0x1f5
[<ffffffff81051735>] ? rescuer_thread+0x28d/0x28d
[<ffffffff81056d74>] kthread+0xd2/0xda
[<ffffffff81056ca2>] ? __kthread_parkme+0x61/0x61
[<ffffffff8149e66c>] ret_from_fork+0x7c/0xb0
[<ffffffff81056ca2>] ? __kthread_parkme+0x61/0x61
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
- Power supply notifier
- Several drivers gained DT support
- Added Maxim 14577 driver
- Change of maintainer
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Merge tag 'for-v3.14' of git://git.infradead.org/battery-2.6
Pull battery updates from Dmitry Eremin-Solenikov:
"I'm picking up power supply maintainership from Anton Vorontov. Could
you please pull battery-2.6 git tree changes prepared for the v3.14
release.
Highlights:
- Power supply notifier
- Several drivers gained DT support
- Added Maxim 14577 driver
- Change of maintainer"
* tag 'for-v3.14' of git://git.infradead.org/battery-2.6:
MAINTAINERS: Pick up power supply maintainership
max17042_battery: Add IRQF_ONESHOT flag to use default irq handler
gpio-charger: Support wakeup events
power_supply: Add charger support for Maxim 14577
dt: Binding documentation for isp1704 charger
isp1704_charger: Add DT support
charger-manager: of_cm_parse_desc() should be static
bq2415x_charger: Add DT support
power_supply: Add power_supply_get_by_phandle
bq2415x_charger: Use power_supply notifier for automode
power: reset: Add as3722 power-off driver
mfd: AS3722: Add dt node properties for system power controller
charger-manager: Support deivce tree in charger manager driver
charger-manager: Modify the way of checking battery's temperature
power_supply: Add power_supply notifier
New drivers
- Samsung Maxim 14577; Micro USB, Regulator, IRQ Controller and Battery Charger
- TI/National Semiconductor LP3943 I2C GPIO Expander and PWM Generator
Existing driver adaptions
- Expansion of Wolfson Arizona DSP and High-Pass filter controls
- TI TWL6040 default Regmap support and Regcache addition/bypass
- Some nice Smatch catch fixes
- Conversion of TI OMAP-USB and TI TWL6030 to endian neutralness
- ChromeOS EC timing (delay) adaptions and added dependency on OF
- Many constifications of 'struct {mfd_cell,regmap_irq,et. al}'
- Watchdog support added for NVIDIA AS3722
- Convert functions to static in TI AM335x
- Realigned previously defeated functionality in TI AM335x
- IIO ADC-TSC concurrency dead-lock/timeout resolution
- Addition of Power Management and Clock support for Samsung core
- DEFINE_PCI_DEVICE_TABLE macro removal from MFD Subsystem
- Greater use of irqdomain functionality in ST-E AB8500
- Removal of 'include/linux/mfd/abx500/ab8500-gpio.h'
- Wolfson WM831x PMIC Power Management changes s/poweroff/shutdown/
- Device Tree documentation added for TI/Nat Semi LP3943
- Version detection and voltage tables for TI TPS6586x PMIC devices
- Simplification of Freescale MC13XXX (de-)initialisation routines
- Clean-up and simplification of the Realtek parent driver
- Added support for RTL8402 Realtek PCI-Express card reader
- Resource leak fix for Maxim 77686
- Possible suspend BUG() fix in OMAP USB TLL
- Support for new Wolfson WM5110 Revision (D)
- Testing of automatic assignment of of_node in mfd_add_device()
- Reversion of the above when it started to cause issues
- Remove legacy Platform Data from;
TI TWL Core, Qualcomm SSBI and ST-E ABx500 Pinctrl
- Clean-ups; tabbing issues, function name changes, 'drvdata = NULL' removal,
unused uninitialised warning mitigation, error message clarity,
removal of redundant/duplicate checks, licensing (GPL -> GPL2),
coding consistency, duplicate function declaration, ret checks,
commit corrections, redundant of_match_ptr() helper removal,
spelling, #if-deffery removal and header guards name changes
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Merge tag 'mfd-3.14-1' of git://git.linaro.org/people/ljones/mfd
Pull MFD changes from Lee Jones:
"New drivers
- Samsung Maxim 14577; Micro USB, Regulator, IRQ Controller and
Battery Charger
- TI/National Semiconductor LP3943 I2C GPIO Expander and PWM
Generator
Existing driver adaptions
- Expansion of Wolfson Arizona DSP and High-Pass filter controls
- TI TWL6040 default Regmap support and Regcache addition/bypass
- Some nice Smatch catch fixes
- Conversion of TI OMAP-USB and TI TWL6030 to endian neutralness
- ChromeOS EC timing (delay) adaptions and added dependency on OF
- Many constifications of 'struct {mfd_cell,regmap_irq,et.al}'
- Watchdog support added for NVIDIA AS3722
- Convert functions to static in TI AM335x
- Realigned previously defeated functionality in TI AM335x
- IIO ADC-TSC concurrency dead-lock/timeout resolution
- Addition of Power Management and Clock support for Samsung core
- DEFINE_PCI_DEVICE_TABLE macro removal from MFD Subsystem
- Greater use of irqdomain functionality in ST-E AB8500
- Removal of 'include/linux/mfd/abx500/ab8500-gpio.h'
- Wolfson WM831x PMIC Power Management changes s/poweroff/shutdown/
- Device Tree documentation added for TI/Nat Semi LP3943
- Version detection and voltage tables for TI TPS6586x PMIC devices
- Simplification of Freescale MC13XXX (de-)initialisation routines
- Clean-up and simplification of the Realtek parent driver
- Added support for RTL8402 Realtek PCI-Express card reader
- Resource leak fix for Maxim 77686
- Possible suspend BUG() fix in OMAP USB TLL
- Support for new Wolfson WM5110 Revision (D)
- Testing of automatic assignment of of_node in mfd_add_device()
- Reversion of the above when it started to cause issues
- Remove legacy Platform Data from;
TI TWL Core, Qualcomm SSBI and ST-E ABx500 Pinctrl
- Clean-ups; tabbing issues, function name changes, 'drvdata = NULL'
removal, unused uninitialised warning mitigation, error
message clarity, removal of redundant/duplicate checks,
licensing (GPL -> GPL2), coding consistency, duplicate
function declaration, ret checks, commit corrections,
redundant of_match_ptr() helper removal, spelling,
#if-deffery removal and header guards name changes"
* tag 'mfd-3.14-1' of git://git.linaro.org/people/ljones/mfd: (78 commits)
mfd: wm5110: Add register patch for rev D chip
mfd: omap-usb-tll: Don't hold lock during pm_runtime_get/put_sync()
gpio: lp3943: Remove redundant of_match_ptr helper
mfd: sta2x11-mfd: Use named constants for pci_power_t values
Documentation: mfd: Fix LDO index in s2mps11.txt
mfd: Cleanup mfd-mcp-sa11x0.h header
mfd: max8997: Use "IS_ENABLED(CONFIG_OF)" for DT code.
mfd: twl6030: Fix endianness problem in IRQ handler
mfd: sec-core: Add cells for S5M8767-clocks
mfd: max14577: Remove redundant of_match_ptr helper
mfd: twl6040: Fix sparse non static symbol warning
mfd: Revert "mfd: Always assign of_node in mfd_add_device()"
mfd: rtsx: Fix sparse non static symbol warning
mfd: max77693: Set proper maximum register for MUIC regmap
mfd: max77686: Fix regmap resource leak on driver remove
mfd: Represent correct filenames in file headers
mfd: rtsx: Add support for card reader rtl8402
mfd: rtsx: Add set pull control macro and simplify rtl8411
mfd: max8997: Enforce mfd_add_devices() return value check
mfd: mc13xxx: Simplify probe() & remove()
...
This is called from qp_grp_and_vf_bind() and we are holding the
vf->lock so the allocation can't sleep.
Fixes: e3cf00d0a8 ('IB/usnic: Add Cisco VIC low-level hardware driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
The following command has been used to verify that the kernel-doc
tool no longer complains about undocumented fields:
scripts/kernel-doc -html drivers/scsi/scsi_transport_srp.c \
include/scsi/scsi_transport_srp.h >srp-transport-doc.html
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Sebastian Riemer <sebastian.riemer@profitbricks.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Add a diagram in Documentation/scsi/scsi_transport_srp that
illustrates the rport state transitions.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
The rport timers must be stopped before the SRP initiator destroys the
resources associated with the SCSI host. This is necessary because
otherwise the callback functions invoked from the SRP transport layer
could trigger a use-after-free. Stopping the rport timers before
invoking scsi_remove_host() can trigger long delays in the SCSI error
handler if a transport layer failure occurs while scsi_remove_host()
is in progress. Hence move the code for stopping the rport timers from
srp_rport_release() into a new function and invoke that function after
scsi_remove_host() has finished. This patch fixes the following
sporadic kernel crash:
kernel BUG at include/asm-generic/dma-mapping-common.h:64!
invalid opcode: 0000 [#1] SMP
RIP: 0010:[<ffffffffa03b20b1>] [<ffffffffa03b20b1>] srp_unmap_data+0x121/0x130 [ib_srp]
Call Trace:
[<ffffffffa03b20fc>] srp_free_req+0x3c/0x80 [ib_srp]
[<ffffffffa03b2188>] srp_finish_req+0x48/0x70 [ib_srp]
[<ffffffffa03b21fb>] srp_terminate_io+0x4b/0x60 [ib_srp]
[<ffffffffa03a6fb5>] __rport_fail_io_fast+0x75/0x80 [scsi_transport_srp]
[<ffffffffa03a7438>] rport_fast_io_fail_timedout+0x88/0xc0 [scsi_transport_srp]
[<ffffffff8108b370>] worker_thread+0x170/0x2a0
[<ffffffff81090876>] kthread+0x96/0xa0
[<ffffffff8100c0ca>] child_rip+0xa/0x20
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
The current behavior of the SRP transport layer when a transport layer
error is encountered is to block SCSI command processing only if
fast_io_fail_tmo != off. The current behavior of the FC transport
layer when a transport layer error is encountered is to block SCSI
command processing no matter which value fast_io_fail_tmo has been set
to. Make the behavior of the SRP transport layer consistent with that
of the FC transport layer to avoid confusion.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
master->transfer_one returns positive value is not a error.
So set ret to 0 when master->transfer_one returns positive value.
Otherwise, I hit "spi_master spi0: failed to transfer one message from queue"
error when my transfer_one callback returns 1.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Today was my last day at ORNL, and my future endeavors will leave even
less time to maintain the SRP initiator.
My thanks especially go to Bart, for keeping the pressure to improve
alive, and for driving so many of those improvements.
[ Add Bart as new submaintainer. - Roland ]
Signed-off-by: Roland Dreier <roland@purestorage.com>
