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(parent: 5b3fe63) | patch
proc: less LOCK operations during lookup
authorAlexey Dobriyan <adobriyan@sw.ru>
Fri, 8 Feb 2008 12:18:27 +0000 (04:18 -0800)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Fri, 8 Feb 2008 17:22:23 +0000 (09:22 -0800)
commit4237e0d3de38da640d7c977d68f5f7f1d207a631
tree0bf02984aef945c5d97a5929b82e7ecd6b7f39edtree | snapshot
parent5b3fe63b19e00f3b2a14a09c979e84163029e390commit | diff
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>
fs/proc/generic.c diff | blob | history
Full containers within linux kernel