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| author | Hugh Dickins <hughd@google.com> | 2014-06-04 16:05:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-04 16:53:51 -0700 |
| commit | 7f39dda9d86fb4f4f17af0de170decf125726f8c (patch) | |
| tree | 30c87e21eb0ad3366033a8d93f70a08dc02b7df0 /Documentation/hw_random.txt | |
| parent | f9625c48ecca4aa850b50ecbbb540228ad59e92e (diff) | |
mm: fix sleeping function warning from __put_anon_vma
Trinity reports BUG:
sleeping function called from invalid context at kernel/locking/rwsem.c:47
in_atomic(): 0, irqs_disabled(): 0, pid: 5787, name: trinity-c27
__might_sleep < down_write < __put_anon_vma < page_get_anon_vma <
migrate_pages < compact_zone < compact_zone_order < try_to_compact_pages ..
Right, since conversion to mutex then rwsem, we should not put_anon_vma()
from inside an rcu_read_lock()ed section: fix the two places that did so.
And add might_sleep() to anon_vma_free(), as suggested by Peter Zijlstra.
Fixes: 88c22088bf23 ("mm: optimize page_lock_anon_vma() fast-path")
Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/hw_random.txt')
0 files changed, 0 insertions, 0 deletions