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linux-sg2042/fs/ext4
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Theodore Ts'o eb8abb927a ext4: Remove useless spinlock in ext4_getattr() 
Linus noted, and complained to me, that doing while lots of "git diff"'s
of kernel sources, these spinlocks were responsible for 27% of the
spinlock cost on his two-processor system as reported by perf.

Git was doing lots of parallel stats, and this was putting a lot of
pressure on ext4_getattr().  A spinlock to protect a single
memory-to-memory copy is pointless, so remove it.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2010-11-02 10:38:30 -04:00
..
Kconfig ext4: Don't ask about supporting ext2/3 in ext4 if ext4 is not configured 2009-12-21 10:54:09 -05:00
Makefile ext4: use bio layer instead of buffer layer in mpage_da_submit_io 2010-10-27 21:30:10 -04:00
acl.c ext4: update ctime when changing the file's permission by setfacl 2010-06-15 12:19:59 -04:00
acl.h ext[234]: move over to 'check_acl' permission model 2009-09-08 11:09:04 -07:00
balloc.c ext4: rename mark_bitmap_end() to ext4_mark_bitmap_end() 2010-10-27 21:30:15 -04:00
bitmap.c ext4: Change unsigned long to unsigned int 2008-11-05 00:14:04 -05:00
block_validity.c ext4: rename {exit,init}_ext4_*() to ext4_{exit,init}_*() 2010-10-27 21:30:14 -04:00
dir.c ext4: improve llseek error handling for overly large seek offsets 2010-10-27 21:30:06 -04:00
ext4.h ext4: move ext4_mb_{get,put}_buddy_cache_lock and make them static 2010-10-27 21:30:15 -04:00
ext4_extents.h ext4: rename {ext,idx}_pblock and inline small extent functions 2010-10-27 21:30:14 -04:00
ext4_jbd2.c ext4: Pass line numbers to ext4_error() and friends 2010-07-27 11:56:40 -04:00
ext4_jbd2.h ext4: Pass line numbers to ext4_error() and friends 2010-07-27 11:56:40 -04:00
extents.c Merge branch 'next' into upstream-merge 2010-10-27 23:44:47 -04:00
file.c ext4: improve llseek error handling for overly large seek offsets 2010-10-27 21:30:06 -04:00
fsync.c Merge branch 'next' into upstream-merge 2010-10-27 23:44:47 -04:00
hash.c ext4: Add support for non-native signed/unsigned htree hash algorithms 2008-10-28 13:21:44 -04:00
ialloc.c Merge branch 'next' into upstream-merge 2010-10-27 23:44:47 -04:00
inode.c ext4: Remove useless spinlock in ext4_getattr() 2010-11-02 10:38:30 -04:00
ioctl.c ext4: Drop whitespace at end of lines 2010-05-17 07:00:00 -04:00
mballoc.c Merge branch 'next' into upstream-merge 2010-10-27 23:44:47 -04:00
mballoc.h ext4: consolidate in_range() definitions 2010-03-03 23:55:01 -05:00
migrate.c ext4: rename {ext,idx}_pblock and inline small extent functions 2010-10-27 21:30:14 -04:00
move_extent.c ext4: rename {ext,idx}_pblock and inline small extent functions 2010-10-27 21:30:14 -04:00
namei.c Merge branch 'next' into upstream-merge 2010-10-27 23:44:47 -04:00
page-io.c ext4: rename {exit,init}_ext4_*() to ext4_{exit,init}_*() 2010-10-27 21:30:14 -04:00
resize.c Merge branch 'next' into upstream-merge 2010-10-27 23:44:47 -04:00
super.c new helper: mount_bdev() 2010-10-29 04:16:13 -04:00
symlink.c ext4: symlink must be handled via filesystem specific operation 2010-05-16 02:00:00 -04:00
xattr.c ext4: rename {exit,init}_ext4_*() to ext4_{exit,init}_*() 2010-10-27 21:30:14 -04:00
xattr.h ext4: fix compile with CONFIG_EXT4_FS_XATTR disabled 2010-10-28 09:29:17 -07:00
xattr_security.c ext4: constify xattr_handler 2010-05-21 18:31:19 -04:00
xattr_trusted.c ext4: constify xattr_handler 2010-05-21 18:31:19 -04:00
xattr_user.c ext4: constify xattr_handler 2010-05-21 18:31:19 -04:00