On 04/05/2017 01:40 PM, Andrey Ryabinin wrote:
> On 04/05/2017 10:46 AM, Vlastimil Babka wrote:
>> The function __alloc_pages_direct_compact() sets PF_MEMALLOC to prevent
>> deadlock during page migration by lock_page() (see the comment in
>> __unmap_and_move()). Then it u
F_MEMALLOC is already set.
Fixes: a8161d1ed609 ("mm, page_alloc: restructure direct compaction handling in
slowpath")
Reported-by: Andrey Ryabinin <aryabi...@virtuozzo.com>
Signed-off-by: Vlastimil Babka <vba...@suse.cz>
Cc: <sta...@vger.kernel.org>
---
mm/page_alloc.c
xes
(without the new helpers, to make backporting easier). Patch 2 introduces the
new helpers, modelled after existing memalloc_noio_* and memalloc_nofs_*
helpers, and converts mm core to use them. Patches 3 and 4 convert non-mm code.
Based on next-20170404.
Vlastimil Babka (4):
mm: prevent potent
lar to the existing
memalloc_noio_* and memalloc_nofs_* helpers. Convert existing setting/clearing
of PF_MEMALLOC within mm to the new helpers.
There are no known issues with the converted code, but the change makes it more
robust.
Suggested-by: Michal Hocko <mho...@suse.com>
Signed-off-by:
On 04/05/2017 01:36 PM, Richard Weinberger wrote:
> Michal,
>
> Am 05.04.2017 um 13:31 schrieb Michal Hocko:
>> On Wed 05-04-17 09:47:00, Vlastimil Babka wrote:
>>> Nandsim has own functions set_memalloc() and clear_memalloc() for robust
>>> setting and clea
We now have memalloc_noreclaim_{save,restore} helpers for robust setting and
clearing of PF_MEMALLOC. Let's convert the code which was using the generic
tsk_restore_flags(). No functional change.
Signed-off-by: Vlastimil Babka <vba...@suse.cz>
Cc: Josef Bacik <jba...@fb.com>
Cc: Lee
Nandsim has own functions set_memalloc() and clear_memalloc() for robust
setting and clearing of PF_MEMALLOC. Replace them by the new generic helpers.
No functional change.
Signed-off-by: Vlastimil Babka <vba...@suse.cz>
Cc: Boris Brezillon <boris.brezil...@free-electrons.com>
