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

[Vlastimil Babka]

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
> waiting.
>
> 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>