Wu Fengguang ac693061b1 writeback: introduce .tagged_writepages for the WB_SYNC_NONE sync stage ... commit 6e6938b6d3 upstream. sync(2) is performed in two stages: the WB_SYNC_NONE sync and the WB_SYNC_ALL sync. Identify the first stage with .tagged_writepages and do livelock prevention for it, too. Jan's commit f446daaea9 ("mm: implement writeback livelock avoidance using page tagging") is a partial fix in that it only fixed the WB_SYNC_ALL phase livelock. Although ext4 is tested to no longer livelock with commit f446daaea9, it may due to some "redirty_tail() after pages_skipped" effect which is by no means a guarantee for _all_ the file systems. Note that writeback_inodes_sb() is called by not only sync(), they are treated the same because the other callers also need livelock prevention. Impact: It changes the order in which pages/inodes are synced to disk. Now in the WB_SYNC_NONE stage, it won't proceed to write the next inode until finished with the current inode. Acked-by: Jan Kara <jack@suse.cz> CC: Dave Chinner <david@fromorbit.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>		2011-10-03 11:40:43 -07:00
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acpi	Merge branches 'd3cold', 'bugzilla-37412' and 'bugzilla-38152' into release	2011-07-14 00:16:38 -04:00
asm-generic	Merge branches 'gpio/merge' and 'spi/merge' of git://git.secretlab.ca/git/linux-2.6	2011-06-17 10:36:32 -07:00
crypto
drm	drm/i915: Fix typo in DRM_I915_OVERLAY_PUT_IMAGE ioctl define	2011-08-15 18:31:35 -07:00
keys
linux	writeback: introduce .tagged_writepages for the WB_SYNC_NONE sync stage	2011-10-03 11:40:43 -07:00
math-emu
media	[media] tuner-core/v4l2-subdev: document that the type field has to be filled in	2011-07-07 15:04:23 -03:00
mtd
net	fs/9p: Use protocol-defined value for lock/getlock 'type' field.	2011-10-03 11:40:22 -07:00
pcmcia
rdma	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband	2011-05-26 12:13:57 -07:00
rxrpc
scsi	[SCSI] libsas: Add option for SATA soft reset	2011-05-26 22:49:33 -05:00
sound	ALSA: sb16 - Fix build errors on MIPS and others with 13bit ioctl size	2011-06-30 15:33:57 +02:00
target	[SCSI] target: Convert REPORT_LUNs to use int_to_scsilun	2011-05-24 13:02:42 -04:00
trace	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4	2011-06-21 10:22:35 -07:00
video	Merge branches 'common/fbdev' and 'common/fbdev-meram' of master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6	2011-05-24 15:49:57 +09:00
xen	xen: allow enable use of VGA console on dom0	2011-08-15 18:31:34 -07:00
Kbuild