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linux-sg2042/fs/gfs2
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Abhi Das b066a4eebd gfs2: forcibly flush ail to relieve memory pressure 
On systems with low memory, it is possible for gfs2 to infinitely
loop in balance_dirty_pages() under heavy IO (creating sparse files).

balance_dirty_pages() attempts to write out the dirty pages via
gfs2_writepages() but none are found because these dirty pages are
being used by the journaling code in the ail. Normally, the journal
has an upper threshold which when hit triggers an automatic flush
of the ail. But this threshold can be higher than the number of
allowable dirty pages and result in the ail never being flushed.

This patch forces an ail flush when gfs2_writepages() fails to write
anything. This is a good indication that the ail might be holding
some dirty pages.

Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
 		2017-08-10 10:51:03 -05:00
..
Kconfig Finally eradicate CONFIG_HOTPLUG 2013-06-03 14:20:18 -07:00
Makefile GFS2: Rename ops_inode.c to inode.c 2011-05-10 13:12:49 +01:00
acl.c gfs2: Don't clear SGID when inheriting ACLs 2017-07-19 10:58:54 -05:00
acl.h gfs2: Switch to generic xattr handlers 2016-05-12 22:28:05 -04:00
aops.c gfs2: forcibly flush ail to relieve memory pressure 2017-08-10 10:51:03 -05:00
bmap.c gfs2: add flag REQ_PRIO for metadata I/O 2017-07-21 07:48:22 -05:00
bmap.h GFS2: Clean up journal extent mapping 2014-03-03 13:50:12 +00:00
dentry.c gfs2: Lock holder cleanup 2016-06-27 09:47:09 -05:00
dir.c gfs2: add flag REQ_PRIO for metadata I/O 2017-07-21 07:48:22 -05:00
dir.h GFS2: Make rename not save dirent location 2014-10-01 14:06:15 +01:00
export.c gfs2: Get rid of gfs2_ilookup 2016-06-27 09:47:08 -05:00
file.c gfs2: Lock holder cleanup (fixup) 2017-07-17 13:39:15 -05:00
gfs2.h
…
glock.c gfs2: Clean up waiting on glocks 2017-08-10 10:51:02 -05:00
glock.h gfs2: gfs2_evict_inode: Put glocks asynchronously 2017-08-10 10:45:21 -05:00
glops.c gfs2: Get rid of gfs2_set_nlink 2017-08-10 10:42:11 -05:00
glops.h GFS2: update freeze code to use freeze/thaw_super on all nodes 2014-11-17 10:36:39 +00:00
incore.h gfs2: forcibly flush ail to relieve memory pressure 2017-08-10 10:51:03 -05:00
inode.c gfs2: Fix trivial typos 2017-08-09 09:36:39 -05:00
inode.h GFS2: use BIT() macro 2016-08-02 12:05:27 -05:00
lock_dlm.c sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
log.c gfs2: forcibly flush ail to relieve memory pressure 2017-08-10 10:51:03 -05:00
log.h GFS2: remove transaction glock 2014-05-14 10:04:34 +01:00
lops.c Writeback error handling fixes (pile #2) 2017-07-07 19:38:17 -07:00
lops.h gfs2: use bio op accessors 2016-06-07 13:41:38 -06:00
main.c GFS2: Remove gl_list from glock structure 2017-06-12 14:39:12 -05:00
meta_io.c gfs2: add flag REQ_PRIO for metadata I/O 2017-07-21 07:48:22 -05:00
meta_io.h GFS2: Refactor gfs2_remove_from_journal 2016-05-06 11:27:27 -05:00
ops_fstype.c GFS2: Delete debugfs files only after we evict the glocks 2017-08-09 09:36:39 -05:00
quota.c gfs2: add flag REQ_PRIO for metadata I/O 2017-07-21 07:48:22 -05:00
quota.h GFS2: Make rgrp reservations part of the gfs2_inode structure 2015-12-14 12:16:38 -06:00
recovery.c GFS2: Fix gfs2_replay_incr_blk for multiple journal sizes 2016-07-21 13:02:44 -05:00
recovery.h GFS2: Fix gfs2_replay_incr_blk for multiple journal sizes 2016-07-21 13:02:44 -05:00
rgrp.c GFS2: Don't bother trying to add rgrps to the lru list 2017-08-09 09:36:38 -05:00
rgrp.h GFS2: Non-recursive delete 2017-04-19 08:25:43 -04:00
super.c gfs2: Defer deleting inodes under memory pressure 2017-08-10 10:49:13 -05:00
super.h GFS2: update freeze code to use freeze/thaw_super on all nodes 2014-11-17 10:36:39 +00:00
sys.c We've got eight GFS2 patches for this merge window: 2017-07-05 16:57:08 -07:00
sys.h GFS2: dlm based recovery coordination 2012-01-11 09:23:05 +00:00
trace_gfs2.h gfs2: Make statistics unsigned, suitable for use with do_div() 2015-09-03 13:33:32 -05:00
trans.c GFS2: Reduce contention on gfs2_log_lock 2017-01-30 12:10:25 -05:00
trans.h GFS2: Split gfs2_trans_add_bh() into two 2013-01-29 10:28:04 +00:00
util.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
util.h GFS2: Make rgrp reservations part of the gfs2_inode structure 2015-12-14 12:16:38 -06:00
xattr.c gfs2: Protect gl->gl_object by spin lock 2017-07-05 07:20:52 -05:00
xattr.h gfs2: Remove gfs2_xattr_acl_chmod 2015-12-06 21:25:17 -05:00