The patch titled
Subject: memcg: free kmem cache id on css offline
has been added to the -mm tree. Its filename is
memcg-free-kmem-cache-id-on-css-offline.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/memcg-free-kmem-cache-id-on-css-offline.patch
echo and later at
echo http://ozlabs.org/~akpm/mmotm/broken-out/memcg-free-kmem-cache-id-on-css-offline.patch
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------------------------------------------------------
From: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Subject: memcg: free kmem cache id on css offline
This will allow new kmem active cgroups to reuse the id and therefore the
caches used by the dead memory cgroup.
Signed-off-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff -puN mm/memcontrol.c~memcg-free-kmem-cache-id-on-css-offline mm/memcontrol.c
--- a/mm/memcontrol.c~memcg-free-kmem-cache-id-on-css-offline
+++ a/mm/memcontrol.c
@@ -605,14 +605,10 @@ int memcg_limited_groups_array_size;
struct static_key memcg_kmem_enabled_key;
EXPORT_SYMBOL(memcg_kmem_enabled_key);
-static void memcg_free_cache_id(int id);
-
static void disarm_kmem_keys(struct mem_cgroup *memcg)
{
- if (memcg_kmem_is_active(memcg)) {
+ if (memcg_kmem_is_active(memcg))
static_key_slow_dec(&memcg_kmem_enabled_key);
- memcg_free_cache_id(memcg->kmemcg_id);
- }
/*
* This check can't live in kmem destruction function,
* since the charges will outlive the cgroup
@@ -4730,6 +4726,11 @@ static void mem_cgroup_css_offline(struc
spin_unlock(&memcg->event_list_lock);
vmpressure_cleanup(&memcg->vmpressure);
+
+#ifdef CONFIG_MEMCG_KMEM
+ if (memcg_kmem_is_active(memcg))
+ memcg_free_cache_id(memcg_cache_id(memcg));
+#endif
}
static void mem_cgroup_css_free(struct cgroup_subsys_state *css)
_
Patches currently in -mm which might be from vdavydov@xxxxxxxxxxxxx are
slab-print-slabinfo-header-in-seq-show.patch
mm-memcontrol-lockless-page-counters.patch
mm-hugetlb_cgroup-convert-to-lockless-page-counters.patch
kernel-res_counter-remove-the-unused-api.patch
kernel-res_counter-remove-the-unused-api-fix.patch
mm-memcontrol-convert-reclaim-iterator-to-simple-css-refcounting.patch
mm-memcontrol-take-a-css-reference-for-each-charged-page.patch
mm-memcontrol-remove-obsolete-kmemcg-pinning-tricks.patch
mm-memcontrol-continue-cache-reclaim-from-offlined-groups.patch
mm-memcontrol-remove-synchroneous-stock-draining-code.patch
mm-introduce-single-zone-pcplists-drain.patch
mm-page_isolation-drain-single-zone-pcplists.patch
mm-cma-drain-single-zone-pcplists.patch
mm-memory_hotplug-failure-drain-single-zone-pcplists.patch
memcg-simplify-unreclaimable-groups-handling-in-soft-limit-reclaim.patch
memcg-remove-activate_kmem_mutex.patch
mm-memcontrol-micro-optimize-mem_cgroup_split_huge_fixup.patch
mm-memcontrol-uncharge-pages-on-swapout.patch
mm-memcontrol-uncharge-pages-on-swapout-fix.patch
mm-memcontrol-remove-unnecessary-pcg_memsw-memoryswap-charge-flag.patch
mm-memcontrol-remove-unnecessary-pcg_mem-memory-charge-flag.patch
mm-memcontrol-remove-unnecessary-pcg_used-pc-mem_cgroup-valid-flag.patch
mm-memcontrol-remove-unnecessary-pcg_used-pc-mem_cgroup-valid-flag-fix.patch
mm-memcontrol-inline-memcg-move_lock-locking.patch
mm-memcontrol-dont-pass-a-null-memcg-to-mem_cgroup_end_move.patch
mm-memcontrol-fold-mem_cgroup_start_move-mem_cgroup_end_move.patch
mm-memcontrol-fold-mem_cgroup_start_move-mem_cgroup_end_move-fix.patch
memcg-remove-mem_cgroup_reclaimable-check-from-soft-reclaim.patch
memcg-use-generic-slab-iterators-for-showing-slabinfo.patch
mm-memcontrol-shorten-the-page-statistics-update-slowpath.patch
mm-memcontrol-remove-bogus-null-check-after-mem_cgroup_from_task.patch
mm-memcontrol-pull-the-null-check-from-__mem_cgroup_same_or_subtree.patch
mm-memcontrol-drop-bogus-rcu-locking-from-mem_cgroup_same_or_subtree.patch
mm-embed-the-memcg-pointer-directly-into-struct-page.patch
mm-embed-the-memcg-pointer-directly-into-struct-page-fix.patch
mm-page_cgroup-rename-file-to-mm-swap_cgroupc.patch
mm-move-page-mem_cgroup-bad-page-handling-into-generic-code.patch
mm-move-page-mem_cgroup-bad-page-handling-into-generic-code-fix.patch
mm-move-page-mem_cgroup-bad-page-handling-into-generic-code-fix-2.patch
memcg-do-not-destroy-kmem-caches-on-css-offline.patch
slab-charge-slab-pages-to-the-current-memory-cgroup.patch
memcg-decouple-per-memcg-kmem-cache-from-the-owner-memcg.patch
memcg-zap-memcg_unregister_cache.patch
memcg-free-kmem-cache-id-on-css-offline.patch
memcg-introduce-memcg_kmem_should_charge-helper.patch
slab-introduce-slab_free-helper.patch
slab-recharge-slab-pages-to-the-allocating-memory-cgroup.patch
linux-next.patch
slab-fix-cpuset-check-in-fallback_alloc.patch
slub-fix-cpuset-check-in-get_any_partial.patch
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