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authorMichel Lespinasse <walken@google.com>2011-01-13 15:46:14 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-13 17:32:36 -0800
commit53a7706d5ed8f1a53ba062b318773160cc476dde (patch)
treea1990d90d5af3686b7a83b2bbc2ae6463971efc5 /mm/mempolicy.c
parent5fdb2002131cd4e210b9638a4fc932ec7be491d1 (diff)
mlock: do not hold mmap_sem for extended periods of time
__get_user_pages gets a new 'nonblocking' parameter to signal that the caller is prepared to re-acquire mmap_sem and retry the operation if needed. This is used to split off long operations if they are going to block on a disk transfer, or when we detect contention on the mmap_sem. [akpm@linux-foundation.org: remove ref to rwsem_is_contended()] Signed-off-by: Michel Lespinasse <walken@google.com> Cc: Hugh Dickins <hughd@google.com> Cc: Rik van Riel <riel@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Nick Piggin <npiggin@kernel.dk> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mempolicy.c')
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