tree c6d354bddb5b8cd298d139b60a9257ebd8323b90
parent f24ec7f6c6278c0ea4c00efe96d50b1e66796c44
author Paul Jackson <pj@sgi.com> 1126524630 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1126541787 -0700

[PATCH] cpuset semaphore depth check optimize

Optimize the deadlock avoidance check on the global cpuset
semaphore cpuset_sem.  Instead of adding a depth counter to the
task struct of each task, rather just two words are enough, one
to store the depth and the other the current cpuset_sem holder.

Thanks to Nikita Danilov for the idea.

Signed-off-by: Paul Jackson <pj@sgi.com>

[ We may want to change this further, but at least it's now
  a totally internal decision to the cpusets code ]

Signed-off-by: Linus Torvalds <torvalds@osdl.org>