| commit | 4237e0d3de38da640d7c977d68f5f7f1d207a631 | |
| author | Alexey Dobriyan <adobriyan@sw.ru> | |
| Fri, 8 Feb 2008 12:18:27 +0000 (8 04:18 -0800) | ||
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | |
| Fri, 8 Feb 2008 17:22:23 +0000 (8 09:22 -0800) | ||
| tree | 0bf02984aef945c5d97a5929b82e7ecd6b7f39ed | treesnapshot (tar.gz zip) |
| parent | 5b3fe63b19e00f3b2a14a09c979e84163029e390 | commitdiff |
proc: less LOCK operations during lookup
Pseudo-code for lookup effectively is:
LOCK kernel
LOCK proc_subdir_lock
find PDE
UNLOCK proc_subdir_lock
get inode
LOCK proc_subdir_lock
goto unlock
UNLOCK proc_subdir_lock
UNLOCK kernel
We can get rid of LOCK/UNLOCK pair after getting inode simply by jumping
to unlock_kernel() directly.
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pseudo-code for lookup effectively is:
LOCK kernel
LOCK proc_subdir_lock
find PDE
UNLOCK proc_subdir_lock
get inode
LOCK proc_subdir_lock
goto unlock
UNLOCK proc_subdir_lock
UNLOCK kernel
We can get rid of LOCK/UNLOCK pair after getting inode simply by jumping
to unlock_kernel() directly.
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| fs/proc/generic.c | diffblobblamehistory |