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| author | Michel Lespinasse <walken@google.com> | 2011-01-14 00:46:14 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-14 02:32:36 +0100 |
| commit | 53a7706d5ed8f1a53ba062b318773160cc476dde (patch) | |
| tree | a1990d90d5af3686b7a83b2bbc2ae6463971efc5 /net | |
| parent | mm: move VM_LOCKED check to __mlock_vma_pages_range() (diff) | |
| download | linux-53a7706d5ed8f1a53ba062b318773160cc476dde.tar.xz linux-53a7706d5ed8f1a53ba062b318773160cc476dde.zip | |
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 'net')
0 files changed, 0 insertions, 0 deletions