Mark Fasheh 9c7af40b21 ocfs2: throttle back local alloc when low on disk space ... Ocfs2's local allocator disables itself for the duration of a mount point when it has trouble allocating a large enough area from the primary bitmap. That can cause performance problems, especially for disks which were only temporarily full or fragmented. This patch allows for the allocator to shrink it's window first, before being disabled. Later, it can also be re-enabled so that any performance drop is minimized. To do this, we allow the value of osb->local_alloc_bits to be shrunk when needed. The default value is recorded in a mostly read-only variable so that we can re-initialize when required. Locking had to be updated so that we could protect changes to local_alloc_bits. Mostly this involves protecting various local alloc values with the osb spinlock. A new state is also added, OCFS2_LA_THROTTLED, which is used when the local allocator is has shrunk, but is not disabled. If the available space dips below 1 megabyte, the local alloc file is disabled. In either case, local alloc is re-enabled 30 seconds after the event, or when an appropriate amount of bits is seen in the primary bitmap. Signed-off-by: Mark Fasheh <mfasheh@suse.com>		2008-10-13 13:57:57 -07:00
..
cluster	[PATCH] ocfs2/cluster/netdebug.c: fix warning	2008-08-22 10:56:57 -07:00
dlm	SL*B: drop kmem cache argument from constructor	2008-07-26 12:00:07 -07:00
alloc.c	ocfs2: fiemap support	2008-10-03 17:32:11 -04:00
alloc.h	ocfs2: fiemap support	2008-10-03 17:32:11 -04:00
aops.c	ocfs2: Fix a bug in direct IO read.	2008-09-10 01:44:08 -07:00
aops.h	ocfs2: convert to new aops	2007-10-16 09:42:58 -07:00
buffer_head_io.c	ocfs2: clean up bh null checks	2008-01-25 15:05:48 -08:00
buffer_head_io.h	[PATCH 1/2] ocfs2: Add group extend for online resize	2008-01-25 14:53:35 -08:00
dcache.c	ocfs2: Remove mount/unmount votes	2008-01-25 14:45:34 -08:00
dcache.h	ocfs2: Remove special casing for inode creation in ocfs2_dentry_attach_lock()	2006-09-24 13:50:45 -07:00
dir.c	ocfs2: correctly set i_blocks after inline dir gets expanded	2008-08-22 11:09:02 -07:00
dir.h	ocfs2: Rename cleanups	2007-10-12 11:54:38 -07:00
dlmglue.c	ocfs2: fix printk format warnings with OCFS2_FS_STATS=n	2008-07-14 13:57:14 -07:00
dlmglue.h	ocfs2: Break out stackglue into modules.	2008-04-18 08:56:05 -07:00
export.c	ocfs2: Silence false lockdep warnings	2008-01-25 15:05:44 -08:00
export.h	exportfs: make struct export_operations const	2007-10-22 08:13:21 -07:00
extent_map.c	ocfs2: fiemap support	2008-10-03 17:32:11 -04:00
extent_map.h	ocfs2: fiemap support	2008-10-03 17:32:11 -04:00
file.c	ocfs2: POSIX file locks support	2008-10-13 13:57:57 -07:00
file.h	ocfs2: POSIX file locks support	2008-10-13 13:57:57 -07:00
heartbeat.c	ocfs2: Move o2hb functionality into the stack glue.	2008-04-18 08:56:04 -07:00
heartbeat.h	ocfs2: Move o2hb functionality into the stack glue.	2008-04-18 08:56:04 -07:00
inode.c	ocfs2: POSIX file locks support	2008-10-13 13:57:57 -07:00
inode.h	ocfs2: Silence false lockdep warnings	2008-01-25 15:05:44 -08:00
ioctl.c	[PATCH] r/o bind mounts: elevate write count for ioctls()	2008-04-19 00:29:24 -04:00
ioctl.h	ocfs2: Convert ocfs2 over to unlocked_ioctl	2008-04-18 08:56:11 -07:00
journal.c	ocfs2: Fix sleep-with-spinlock recovery regression	2008-08-22 11:08:38 -07:00
journal.h	[PATCH 2/2] ocfs2: Fix race between mount and recovery	2008-07-31 16:21:14 -07:00
localalloc.c	ocfs2: throttle back local alloc when low on disk space	2008-10-13 13:57:57 -07:00
localalloc.h	ocfs2: throttle back local alloc when low on disk space	2008-10-13 13:57:57 -07:00
locks.c	ocfs2: POSIX file locks support	2008-10-13 13:57:57 -07:00
locks.h	ocfs2: POSIX file locks support	2008-10-13 13:57:57 -07:00
Makefile	ocfs2: Allow selection of cluster plug-ins.	2008-04-18 08:56:07 -07:00
mmap.c	ocfs2: Rename ocfs2_meta_[un]lock	2008-01-25 14:46:01 -08:00
mmap.h
namei.c	ocfs2: Improve rename locking	2008-04-18 08:56:11 -07:00
namei.h	ocfs2: Move directory manipulation code into dir.c	2007-10-12 11:54:36 -07:00
ocfs1_fs_compat.h	fs/: Spelling fixes	2008-02-03 17:33:42 +02:00
ocfs2_fs.h	[PATCH 1/2] ocfs2: Add counter in struct ocfs2_dinode to track journal replays	2008-07-31 16:21:13 -07:00
ocfs2_lockid.h	ocfs2: Change mlog_bug_on to BUG_ON in ocfs2_lockid.h	2008-04-18 08:56:07 -07:00
ocfs2_lockingver.h	ocfs2: Negotiate locking protocol versions.	2008-02-06 16:11:29 -08:00
ocfs2.h	ocfs2: throttle back local alloc when low on disk space	2008-10-13 13:57:57 -07:00
resize.c	ocfs2: Fix an endian bug in online resize.	2008-03-10 15:14:07 -07:00
resize.h	[PATCH 2/2] ocfs2: Implement group add for online resize	2008-01-25 15:04:24 -08:00
slot_map.c	ocfs2: Abstract out node number queries.	2008-04-18 08:56:04 -07:00
slot_map.h	ocfs2: De-magic the in-memory slot map.	2008-04-18 08:56:03 -07:00
stack_o2cb.c	ocfs2: Remove ->hangup() from stack glue operations.	2008-06-16 10:46:52 -07:00
stack_user.c	ocfs2: POSIX file locks support	2008-10-13 13:57:57 -07:00
stackglue.c	ocfs2: POSIX file locks support	2008-10-13 13:57:57 -07:00
stackglue.h	ocfs2: POSIX file locks support	2008-10-13 13:57:57 -07:00
suballoc.c	ocfs2: throttle back local alloc when low on disk space	2008-10-13 13:57:57 -07:00
suballoc.h	ocfs2: throttle back local alloc when low on disk space	2008-10-13 13:57:57 -07:00
super.c	ocfs2: throttle back local alloc when low on disk space	2008-10-13 13:57:57 -07:00
super.h	ocfs2: use s_maxbytes directly in ocfs2_change_file_space()	2007-08-09 17:25:07 -07:00
symlink.c	ocfs2: Allow uid/gid/perm changes of symlinks	2008-04-30 17:09:54 -07:00
symlink.h	[PATCH] mark struct inode_operations const 2	2007-02-12 09:48:46 -08:00
sysfile.c	ocfs2: Silence false lockdep warnings	2008-01-25 15:05:44 -08:00
sysfile.h
uptodate.c	mm: Remove slab destructors from kmem_cache_create().	2007-07-20 10:11:58 +09:00
uptodate.h	ocfs2: implement directory read-ahead	2006-09-20 15:53:40 -07:00
ver.c	ocfs2: bump version number	2008-01-25 15:05:46 -08:00
ver.h