On Wed, 3 Feb 2016, Michal Hocko wrote:

From: Michal Hocko <mhocko@suse.com>

__oom_reap_vmas current skips over all mlocked vmas because they need a
special treatment before they are unmapped. This is primarily done for
simplicity. There is no reason to skip over them and reduce the amount
of reclaimed memory. This is safe from the semantic point of view
because try_to_unmap_one during rmap walk would keep tell the reclaim
to cull the page back and mlock it again.

munlock_vma_pages_all is also safe to be called from the oom reaper
context because it doesn't sit on any locks but mmap_sem (for read).

Signed-off-by: Michal Hocko <mhocko@suse.com>

Acked-by: David Rientjes <rientjes@google.com>

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>