Eric Paris f44aebcc56 inotify: use GFP_NOFS under potential memory pressure ... inotify can have a watchs removed under filesystem reclaim. ================================= [ INFO: inconsistent lock state ] 2.6.31-rc2 #16 --------------------------------- inconsistent {IN-RECLAIM_FS-W} -> {RECLAIM_FS-ON-W} usage. khubd/217 [HC0[0]:SC0[0]:HE1:SE1] takes: (iprune_mutex){+.+.?.}, at: [<c10ba899>] invalidate_inodes+0x20/0xe3 {IN-RECLAIM_FS-W} state was registered at: [<c10536ab>] __lock_acquire+0x2c9/0xac4 [<c1053f45>] lock_acquire+0x9f/0xc2 [<c1308872>] __mutex_lock_common+0x2d/0x323 [<c1308c00>] mutex_lock_nested+0x2e/0x36 [<c10ba6ff>] shrink_icache_memory+0x38/0x1b2 [<c108bfb6>] shrink_slab+0xe2/0x13c [<c108c3e1>] kswapd+0x3d1/0x55d [<c10449b5>] kthread+0x66/0x6b [<c1003fdf>] kernel_thread_helper+0x7/0x10 [<ffffffff>] 0xffffffff Two things are needed to fix this. First we need a method to tell fsnotify_create_event() to use GFP_NOFS and second we need to stop using one global IN_IGNORED event and allocate them one at a time. This solves current issues with multiple IN_IGNORED on a queue having tail drop problems and simplifies the allocations since we don't have to worry about two tasks opperating on the IGNORED event concurrently. Signed-off-by: Eric Paris <eparis@redhat.com>		2009-07-21 15:26:27 -04:00
..
dnotify	fsnotify: use def_bool in kconfig instead of letting the user choose	2009-07-21 15:26:26 -04:00
inotify	inotify: use GFP_NOFS under potential memory pressure	2009-07-21 15:26:27 -04:00
fsnotify.c	inotify: use GFP_NOFS under potential memory pressure	2009-07-21 15:26:27 -04:00
fsnotify.h	fsnotify: generic notification queue and waitq	2009-06-11 14:57:53 -04:00
group.c	fsnotify: generic notification queue and waitq	2009-06-11 14:57:53 -04:00
inode_mark.c	fsnotify: allow groups to set freeing_mark to null	2009-06-11 14:57:55 -04:00
Kconfig	fsnotify: use def_bool in kconfig instead of letting the user choose	2009-07-21 15:26:26 -04:00
Makefile	fsnotify: add marks to inodes so groups can interpret how to handle those inodes	2009-06-11 14:57:53 -04:00
notification.c	inotify: use GFP_NOFS under potential memory pressure	2009-07-21 15:26:27 -04:00