The patch titled
Subject: mm: memcontrol: default hierarchy interface for memory fix - high reclaim
has been added to the -mm tree. Its filename is
mm-memcontrol-default-hierarchy-interface-for-memory-fix-high-reclaim.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memcontrol-default-hierarchy-interface-for-memory-fix-high-reclaim.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memcontrol-default-hierarchy-interface-for-memory-fix-high-reclaim.patch
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------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: mm: memcontrol: default hierarchy interface for memory fix - high reclaim
High limit reclaim can currently overscan in proportion to how many
charges are happening concurrently. Tone it down such that charges don't
target the entire high-boundary excess, but instead only the pages they
charged themselves when excess is detected.
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Reported-by: Michal Hocko <mhocko@xxxxxxx>
Cc: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Cc: Greg Thelen <gthelen@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 16 +++++-----------
1 file changed, 5 insertions(+), 11 deletions(-)
diff -puN mm/memcontrol.c~mm-memcontrol-default-hierarchy-interface-for-memory-fix-high-reclaim mm/memcontrol.c
--- a/mm/memcontrol.c~mm-memcontrol-default-hierarchy-interface-for-memory-fix-high-reclaim
+++ a/mm/memcontrol.c
@@ -2381,19 +2381,13 @@ done_restock:
refill_stock(memcg, batch - nr_pages);
/*
* If the hierarchy is above the normal consumption range,
- * make the charging task trim the excess.
+ * make the charging task trim their excess contribution.
*/
do {
- unsigned long nr_pages = page_counter_read(&memcg->memory);
- unsigned long high = ACCESS_ONCE(memcg->high);
-
- if (nr_pages > high) {
- mem_cgroup_events(memcg, MEMCG_HIGH, 1);
-
- try_to_free_mem_cgroup_pages(memcg, nr_pages - high,
- gfp_mask, true);
- }
-
+ if (page_counter_read(&memcg->memory) <= memcg->high)
+ continue;
+ mem_cgroup_events(memcg, MEMCG_HIGH, 1);
+ try_to_free_mem_cgroup_pages(memcg, nr_pages, gfp_mask, true);
} while ((memcg = parent_mem_cgroup(memcg)));
done:
return ret;
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
mm-page_alloc-embed-oom-killing-naturally-into-allocation-slowpath.patch
memcg-remove-extra-newlines-from-memcg-oom-kill-log.patch
mm-vmscan-fix-highidx-argument-type.patch
mm-memory-remove-vm_file-check-on-shared-writable-vmas.patch
mm-memory-merge-shared-writable-dirtying-branches-in-do_wp_page.patch
mm-page_alloc-place-zone_id-check-before-vm_bug_on_page-check.patch
memcg-zap-__memcg_chargeuncharge_slab.patch
memcg-zap-memcg_name-argument-of-memcg_create_kmem_cache.patch
memcg-zap-memcg_slab_caches-and-memcg_slab_mutex.patch
mm-add-fields-for-compound-destructor-and-order-into-struct-page.patch
swap-remove-unused-mem_cgroup_uncharge_swapcache-declaration.patch
mm-memcontrol-track-move_lock-state-internally.patch
mm-memcontrol-track-move_lock-state-internally-fix.patch
mm-page_allocc-__alloc_pages_nodemask-dont-alter-arg-gfp_mask.patch
mm-vmscan-wake-up-all-pfmemalloc-throttled-processes-at-once.patch
mm-hugetlb-reduce-arch-dependent-code-around-follow_huge_.patch
mm-hugetlb-pmd_huge-returns-true-for-non-present-hugepage.patch
mm-hugetlb-take-page-table-lock-in-follow_huge_pmd.patch
mm-hugetlb-fix-getting-refcount-0-page-in-hugetlb_fault.patch
mm-hugetlb-add-migration-hwpoisoned-entry-check-in-hugetlb_change_protection.patch
mm-hugetlb-add-migration-entry-check-in-__unmap_hugepage_range.patch
mm-hugetlb-fix-suboptimal-migration-hwpoisoned-entry-check.patch
mm-hugetlb-cleanup-and-rename-is_hugetlb_entry_migrationhwpoisoned.patch
mm-set-page-pfmemalloc-in-prep_new_page.patch
mm-page_alloc-reduce-number-of-alloc_pages-functions-parameters.patch
mm-reduce-try_to_compact_pages-parameters.patch
mm-microoptimize-zonelist-operations.patch
list_lru-introduce-list_lru_shrink_countwalk.patch
fs-consolidate-nrfree_cached_objects-args-in-shrink_control.patch
vmscan-per-memory-cgroup-slab-shrinkers.patch
memcg-rename-some-cache-id-related-variables.patch
memcg-add-rwsem-to-synchronize-against-memcg_caches-arrays-relocation.patch
list_lru-get-rid-of-active_nodes.patch
list_lru-organize-all-list_lrus-to-list.patch
list_lru-introduce-per-memcg-lists.patch
fs-make-shrinker-memcg-aware.patch
vmscan-force-scan-offline-memory-cgroups.patch
vmscan-force-scan-offline-memory-cgroups-fix.patch
memcg-add-build_bug_on-for-string-tables.patch
mm-page_counter-pull-1-handling-out-of-page_counter_memparse.patch
mm-memcontrol-default-hierarchy-interface-for-memory.patch
mm-memcontrol-default-hierarchy-interface-for-memory-checkpatch-fixes.patch
mm-memcontrol-default-hierarchy-interface-for-memory-fix.patch
mm-memcontrol-default-hierarchy-interface-for-memory-fix-high-reclaim.patch
mm-memcontrol-default-hierarchy-interface-for-memory-fix-none.patch
mm-memcontrol-fold-move_anon-and-move_file.patch
mm-memcontrol-fold-move_anon-and-move_file-fix.patch
oom-add-helpers-for-setting-and-clearing-tif_memdie.patch
oom-thaw-the-oom-victim-if-it-is-frozen.patch
pm-convert-printk-to-pr_-equivalent.patch
sysrq-convert-printk-to-pr_-equivalent.patch
oom-pm-make-oom-detection-in-the-freezer-path-raceless.patch
mm-memcontrol-remove-unnecessary-soft-limit-tree-node-test.patch
mm-memcontrol-consolidate-memory-controller-initialization.patch
mm-memcontrol-consolidate-swap-controller-code.patch
fs-shrinker-always-scan-at-least-one-object-of-each-type.patch
fs-shrinker-always-scan-at-least-one-object-of-each-type-fix.patch
mm-vmscan-fix-the-page-state-calculation-in-too_many_isolated.patch
mm-vmscan-fix-the-page-state-calculation-in-too_many_isolated-fix.patch
documentation-proc-add-proc-pid-numa_maps-interface-explanation-snippet.patch
fs-proc-task_mmu-show-page-size-in-proc-pid-numa_maps.patch
fs-proc-task_mmu-show-page-size-in-proc-pid-numa_maps-fix.patch
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