mm,oom: do not loop !__GFP_FS allocation if the OOM killer is disabled

After the OOM killer is disabled during suspend operation, any
!__GFP_NOFAIL && __GFP_FS allocations are forced to fail.  Thus, any
!__GFP_NOFAIL && !__GFP_FS allocations should be forced to fail as well.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 3583f71..a762be5 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2858,8 +2858,12 @@ __alloc_pages_may_oom(gfp_t gfp_mask, unsigned int order,
                         * XXX: Page reclaim didn't yield anything,
                         * and the OOM killer can't be invoked, but
                         * keep looping as per tradition.
+                        *
+                        * But do not keep looping if oom_killer_disable()
+                        * was already called, for the system is trying to
+                        * enter a quiescent state during suspend.
                         */
-                       *did_some_progress = 1;
+                       *did_some_progress = !oom_killer_disabled;
                        goto out;
                }
                if (pm_suspended_storage())