The patch titled
Subject: mm, oom: reduce dependency on tasklist_lock: fix
has been added to the -mm tree. Its filename is
mm-oom-reduce-dependency-on-tasklist_lock-fix.patch
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From: Hugh Dickins <hughd@xxxxxxxxxx>
Subject: mm, oom: reduce dependency on tasklist_lock: fix
Slab poisoning gave me a General Protection Fault on the
atomic_dec(&__task_cred(p)->user->processes);
line of release_task() called from wait_task_zombie(),
every time my dd to USB testing generated a memcg OOM.
oom_kill_process() now does the put_task_struct(),
mem_cgroup_out_of_memory() should not repeat it.
Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 1 -
1 file changed, 1 deletion(-)
diff -puN mm/memcontrol.c~mm-oom-reduce-dependency-on-tasklist_lock-fix mm/memcontrol.c
--- a/mm/memcontrol.c~mm-oom-reduce-dependency-on-tasklist_lock-fix
+++ a/mm/memcontrol.c
@@ -1523,7 +1523,6 @@ void __mem_cgroup_out_of_memory(struct m
points = chosen_points * 1000 / totalpages;
oom_kill_process(chosen, gfp_mask, order, points, totalpages, memcg,
NULL, "Memory cgroup out of memory");
- put_task_struct(chosen);
}
static unsigned long mem_cgroup_reclaim(struct mem_cgroup *memcg,
_
Subject: Subject: mm, oom: reduce dependency on tasklist_lock: fix
Patches currently in -mm which might be from hughd@xxxxxxxxxx are
memcg-rename-mem_cgroup_stat_swapout-as-mem_cgroup_stat_swap.patch
memcg-remove-mem_cgroup_charge_type_force.patch
swap-allow-swap-readahead-to-be-merged.patch
documentation-update-how-page-cluster-affects-swap-i-o.patch
mm-fadvise-dont-return-einval-when-filesystem-cannot-implement-fadvise.patch
memcg-rename-config-variables.patch
memcg-rename-config-variables-fix.patch
memcg-rename-config-variables-fix-fix.patch
mm-oom-reduce-dependency-on-tasklist_lock-fix.patch
mm-memcg-fix-compaction-migration-failing-due-to-memcg-limits.patch
mm-swapfile-clean-up-unuse_pte-race-handling.patch
mm-memcg-push-down-pageswapcache-check-into-uncharge-entry-functions.patch
mm-memcg-only-check-for-pageswapcache-when-uncharging-anon.patch
mm-memcg-move-swapin-charge-functions-above-callsites.patch
mm-memcg-remove-unneeded-shmem-charge-type.patch
mm-memcg-remove-needless-mm-fixup-to-init_mm-when-charging.patch
mm-memcg-split-swapin-charge-function-into-private-and-public-part.patch
mm-memcg-only-check-swap-cache-pages-for-repeated-charging.patch
mm-memcg-only-check-anon-swapin-page-charges-for-swap-cache.patch
memcg-prevent-oom-with-too-many-dirty-pages.patch
memcg-further-prevent-oom-with-too-many-dirty-pages.patch
shmem-provide-vm_ops-when-also-providing-a-mem-policy.patch
tmpfs-interleave-the-starting-node-of-dev-shmem.patch
prio_tree-debugging-patch.patch
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