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11b80f459a
tmp_suning_uos_patched/fs/ocfs2
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Christoph Hellwig bd5fe6c5eb fs: kill i_alloc_sem 
i_alloc_sem is a rather special rw_semaphore.  It's the last one that may
be released by a non-owner, and it's write side is always mirrored by
real exclusion.  It's intended use it to wait for all pending direct I/O
requests to finish before starting a truncate.

Replace it with a hand-grown construct:

 - exclusion for truncates is already guaranteed by i_mutex, so it can
   simply fall way
 - the reader side is replaced by an i_dio_count member in struct inode
   that counts the number of pending direct I/O requests.  Truncate can't
   proceed as long as it's non-zero
 - when i_dio_count reaches non-zero we wake up a pending truncate using
   wake_up_bit on a new bit in i_flags
 - new references to i_dio_count can't appear while we are waiting for
   it to read zero because the direct I/O count always needs i_mutex
   (or an equivalent like XFS's i_iolock) for starting a new operation.

This scheme is much simpler, and saves the space of a spinlock_t and a
struct list_head in struct inode (typically 160 bits on a non-debug 64-bit
system).

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20 20:47:46 -04:00
..
cluster ocfs2: remove the /sys/o2cb symlink 2011-05-23 23:37:14 -07:00
dlm ocfs2/dlm: Do not migrate resource to a node that is leaving the domain 2011-05-25 21:05:22 -07:00
dlmfs ocfs2: change incorrect 'extern' keyword to 'static' in dlmfs 2011-05-23 23:59:40 -07:00
acl.c ->permission() sanitizing: don't pass flags to ->check_acl() 2011-07-20 01:43:21 -04:00
acl.h ->permission() sanitizing: don't pass flags to ->check_acl() 2011-07-20 01:43:21 -04:00
alloc.c ocfs2: Add trace event for trim. 2011-05-23 23:37:20 -07:00
alloc.h ocfs2: Add ocfs2_trim_fs for SSD trim support. 2011-05-23 23:37:18 -07:00
aops.c fs: kill i_alloc_sem 2011-07-20 20:47:46 -04:00
aops.h Fix common misspellings 2011-03-31 11:26:23 -03:00
blockcheck.c
blockcheck.h
buffer_head_io.c ocfs2: Remove masklog ML_UPTODATE. 2011-02-24 16:22:20 +08:00
buffer_head_io.h
dcache.c ocfs2: fix d_revalidate oopsen on NFS exports 2011-03-10 03:45:07 -05:00
dcache.h Track negative entries v3 2010-09-10 09:18:15 -07:00
dir.c ocfs2: Initialize data_ac (might be used uninitialized) 2011-05-13 11:26:15 -07:00
dir.h
dlmglue.c Merge branch 'mlog_replace_for_39' of git://repo.or.cz/taoma-kernel into ocfs2-merge-window-fix 2011-03-28 09:44:26 -07:00
dlmglue.h ocfs2: Fix lockdep warning in reflink. 2010-09-10 09:19:06 -07:00
export.c exportfs: Return the minimum required handle size 2011-03-14 09:15:28 -04:00
export.h
extent_map.c ocfs2: Remove masklog ML_EXTENT_MAP. 2011-02-22 22:27:33 +08:00
extent_map.h
file.c fs: kill i_alloc_sem 2011-07-20 20:47:46 -04:00
file.h ->permission() sanitizing: don't pass flags to ->permission() 2011-07-20 01:43:24 -04:00
heartbeat.c ocfs2: Remove mlog(0) from fs/ocfs2/heartbeat.c 2011-02-23 21:17:39 +08:00
heartbeat.h
inode.c Fix common misspellings 2011-03-31 11:26:23 -03:00
inode.h Track negative entries v3 2010-09-10 09:18:15 -07:00
ioctl.c Merge branch 'move_extents' of git://oss.oracle.com/git/tye/linux-2.6 into ocfs2-merge-window 2011-05-25 21:51:55 -07:00
ioctl.h
journal.c ocfs2: Skip mount recovery for hard-ro mounts 2011-05-13 11:27:14 -07:00
journal.h Fix common misspellings 2011-03-31 11:26:23 -03:00
Kconfig ocfs2: Make OCFS2_FS depend on CONFIGFS_FS 2011-01-16 21:22:40 +00:00
localalloc.c ocfs2: Remove EXIT from masklog. 2011-03-07 16:43:21 +08:00
localalloc.h
locks.c ocfs2: remove INODE from unused files. 2011-02-21 11:18:23 +08:00
locks.h
Makefile Ocfs2/move_extents: Add basic framework and source files for extent moving. 2011-05-25 15:17:08 +08:00
mmap.c ocfs2: Remove FILE_IO from masklog. 2011-02-22 21:59:46 +08:00
mmap.h
move_extents.c Ocfs2/move_extents: Validate moving goal after the adjustment. 2011-05-27 14:52:57 +08:00
move_extents.h Ocfs2/move_extents: move/defrag extents within a certain range. 2011-05-25 15:17:12 +08:00
namei.c kill check_acl callback of generic_permission() 2011-07-20 01:43:16 -04:00
namei.h
ocfs1_fs_compat.h
ocfs2_fs.h Revert wrong fixes for common misspellings 2011-04-26 23:31:11 -07:00
ocfs2_ioctl.h Ocfs2/move_extents: Adding new ioctl code 'OCFS2_IOC_MOVE_EXT' to ocfs2. 2011-05-25 15:17:08 +08:00
ocfs2_lockid.h
ocfs2_lockingver.h
ocfs2_trace.h ocfs2: Add trace event for trim. 2011-05-23 23:37:20 -07:00
ocfs2.h Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 2011-03-28 13:03:31 -07:00
quota_global.c Fix common misspellings 2011-03-31 11:26:23 -03:00
quota_local.c ocfs2: Remove mlog(0) from quota_local.c. 2011-02-23 22:12:48 +08:00
quota.h ocfs2: use system_wq instead of ocfs2_quota_wq 2011-02-01 11:42:42 +01:00
refcounttree.c new helpers: kern_path_create/user_path_create 2011-07-20 01:44:05 -04:00
refcounttree.h Ocfs2/refcounttree: Publicize couple of funcs from refcounttree.c 2011-05-25 15:17:08 +08:00
reservations.c ocfs2: Remove masklog ML_RESERVATIONS. 2011-02-23 22:10:56 +08:00
reservations.h Fix common misspellings 2011-03-31 11:26:23 -03:00
resize.c ocfs2: Remove mlog(0) from fs/ocfs2/suballoc.c 2011-02-22 08:24:01 +08:00
resize.h
slot_map.c ocfs2: Remove mlog(0) from fs/ocfs2/slot_map.c 2011-02-22 22:29:08 +08:00
slot_map.h
stack_o2cb.c ocfs2: Print message if user mounts without starting global heartbeat 2010-10-06 17:55:29 -07:00
stack_user.c ocfs2_connection_find() returns pointer to bad structure 2010-11-18 15:41:41 -08:00
stackglue.c
stackglue.h Fix common misspellings 2011-03-31 11:26:23 -03:00
suballoc.c Fix common misspellings 2011-03-31 11:26:23 -03:00
suballoc.h ocfs2: allow return of new inode block location before allocation of the inode 2010-09-08 14:25:59 +08:00
super.c more conservative S_NOSEC handling 2011-06-03 18:24:58 -04:00
super.h
symlink.c ocfs2: Remove EXIT from masklog. 2011-03-07 16:43:21 +08:00
symlink.h
sysfile.c ocfs2: Remove mlog(0) from fs/ocfs2/file.c 2011-02-22 22:14:41 +08:00
sysfile.h
uptodate.c ocfs2: Remove masklog ML_UPTODATE. 2011-02-24 16:22:20 +08:00
uptodate.h
ver.c
ver.h
xattr.c Fix common misspellings 2011-03-31 11:26:23 -03:00
xattr.h fs/vfs/security: pass last path component to LSM on inode creation 2011-02-01 11:12:29 -05:00