tree 39917beefd3cddf1c5c2c68894346efe0cc7dff1
parent b2ff457b09554813a7df9e0cd30d5a169a257419
author Paul Menage <menage@google.com> 1184568011 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1184601943 -0700

Reduce cpuset.c write_lock_irq() to read_lock()

cpuset.c:update_nodemask() uses a write_lock_irq() on tasklist_lock to
block concurrent forks; a read_lock() suffices and is less intrusive.

Signed-off-by: Paul Menage<menage@google.com>
Acked-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>