[PATCH] cpuset: might_sleep_if check in cpuset_zones_allowed
authorPaul Jackson <pj@sgi.com>
Sat, 20 May 2006 22:00:11 +0000 (15:00 -0700)
committerLinus Torvalds <torvalds@g5.osdl.org>
Sun, 21 May 2006 19:59:18 +0000 (12:59 -0700)
commit92d1dbd27417c54c23aac6a84c285e256f6118b6
treebab665935a47bb6889ddc3c92a9bee68f1f6f532
parent36be57ffe39e03aab9fbe857f70c7a6a15bd9e08
[PATCH] cpuset: might_sleep_if check in cpuset_zones_allowed

It's too easy to incorrectly call cpuset_zone_allowed() in an atomic
context without __GFP_HARDWALL set, and when done, it is not noticed until
a tight memory situation forces allocations to be tried outside the current
cpuset.

Add a 'might_sleep_if()' check, to catch this earlier on, instead of
waiting for a similar check in the mutex_lock() code, which is only rarely
invoked.

Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
kernel/cpuset.c