The patch titled
Subject: mm: vmscan: remove remains of kswapd-managed zone->all_unreclaimable
has been added to the -mm tree. Its filename is
mm-vmscan-remove-remains-of-kswapd-managed-zone-all_unreclaimable.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-vmscan-remove-remains-of-kswapd-managed-zone-all_unreclaimable.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-vmscan-remove-remains-of-kswapd-managed-zone-all_unreclaimable.patch
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------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: mm: vmscan: remove remains of kswapd-managed zone->all_unreclaimable
shrink_zones() has a special branch to skip the all_unreclaimable() check
during hibernation, because a frozen kswapd can't mark a zone
unreclaimable.
But ever since 6e543d5780e3 ("mm: vmscan: fix do_try_to_free_pages()
livelock"), determining a zone to be unreclaimable is done by directly
looking at its scan history and no longer relies on kswapd setting the
per-zone flag.
Remove this branch and let shrink_zones() check the reclaimability of the
target zones regardless of hibernation state.
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 8 --------
1 file changed, 8 deletions(-)
diff -puN mm/vmscan.c~mm-vmscan-remove-remains-of-kswapd-managed-zone-all_unreclaimable mm/vmscan.c
--- a/mm/vmscan.c~mm-vmscan-remove-remains-of-kswapd-managed-zone-all_unreclaimable
+++ a/mm/vmscan.c
@@ -2540,14 +2540,6 @@ out:
if (sc->nr_reclaimed)
return sc->nr_reclaimed;
- /*
- * As hibernation is going on, kswapd is freezed so that it can't mark
- * the zone into all_unreclaimable. Thus bypassing all_unreclaimable
- * check.
- */
- if (oom_killer_disabled)
- return 0;
-
/* Aborted reclaim to try compaction? don't OOM, then */
if (aborted_reclaim)
return 1;
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
vmalloc-use-rcu-list-iterator-to-reduce-vmap_area_lock-contention.patch
memcg-cleanup-memcg_cache_params-refcnt-usage.patch
memcg-destroy-kmem-caches-when-last-slab-is-freed.patch
memcg-mark-caches-that-belong-to-offline-memcgs-as-dead.patch
slub-dont-fail-kmem_cache_shrink-if-slab-placement-optimization-fails.patch
slub-make-slab_free-non-preemptable.patch
memcg-wait-for-kfrees-to-finish-before-destroying-cache.patch
slub-make-dead-memcg-caches-discard-free-slabs-immediately.patch
slab-do-not-keep-free-objects-slabs-on-dead-memcg-caches.patch
mm-page-flags-clean-up-the-page-flag-test-set-clear-macros.patch
mm-memcontrol-fold-mem_cgroup_do_charge.patch
mm-memcontrol-rearrange-charging-fast-path.patch
mm-memcontrol-reclaim-at-least-once-for-__gfp_noretry.patch
mm-huge_memory-use-gfp_transhuge-when-charging-huge-pages.patch
mm-memcontrol-retry-reclaim-for-oom-disabled-and-__gfp_nofail-charges.patch
mm-memcontrol-remove-explicit-oom-parameter-in-charge-path.patch
mm-memcontrol-simplify-move-precharge-function.patch
mm-memcontrol-catch-root-bypass-in-move-precharge.patch
mm-memcontrol-use-root_mem_cgroup-res_counter.patch
mm-memcontrol-remove-ordering-between-pc-mem_cgroup-and-pagecgroupused.patch
mm-memcontrol-do-not-acquire-page_cgroup-lock-for-kmem-pages.patch
mm-memcontrol-rewrite-charge-api.patch
mm-memcontrol-rewrite-charge-api-fix-3.patch
mm-memcontrol-rewrite-uncharge-api.patch
mm-memcontrol-rewrite-uncharge-api-fix-2.patch
memcg-remove-lookup_cgroup_page-prototype.patch
mm-vmscan-remove-remains-of-kswapd-managed-zone-all_unreclaimable.patch
mm-vmscan-rework-compaction-ready-signaling-in-direct-reclaim.patch
mm-vmscan-remove-all_unreclaimable.patch
mm-vmscan-move-swappiness-out-of-scan_control.patch
memcg-deprecate-memoryforce_empty-knob.patch
memcg-deprecate-memoryforce_empty-knob-fix.patch
debugging-keep-track-of-page-owners.patch
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