Re: [PATCH 10/18] vdso: make arch_setup_additional_pages wait for mmap_sem for write killable

From: Vlastimil Babka
Date: Fri Mar 11 2016 - 06:28:31 EST

On 02/29/2016 02:26 PM, Michal Hocko wrote:
From: Michal Hocko <mhocko@xxxxxxxx>

most architectures are relying on mmap_sem for write in their
arch_setup_additional_pages. If the waiting task gets killed by the oom
killer it would block oom_reaper from asynchronous address space reclaim
and reduce the chances of timely OOM resolving. Wait for the lock in
the killable mode and return with EINTR if the task got killed while

Cc: linux-arch@xxxxxxxxxxxxxxx
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>

I don't have much arch-specific insight, but looks OK.

Acked-by: Vlastimil Babka <vbabka@xxxxxxx>