The commit is pushed to "branch-rh7-3.10.0-862.14.4.vz7.72.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-862.14.4.vz7.72.11
------>
commit c322a6f3894906a47613166668ff63e4744b5439
Author: Andrey Ryabinin <aryabi...@virtuozzo.com>
Date: Thu Oct 18 16:17:35 2018 +0300
mm/tcache: rebalance tree if isolation failed
tcache_lru_isolate() doesn't rebalance reclaim tree if isolation
failed. If the first pool in tree is empty, without rebalancing it
may stay first indefinitely long preventing reclaim.
https://jira.sw.ru/browse/PSBM-89403
Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com>
Acked-by: Kirill Tkhai <ktk...@virtuozzo.com>
---
mm/tcache.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/mm/tcache.c b/mm/tcache.c
index 960450bb825e..eb9c9dea4e51 100644
--- a/mm/tcache.c
+++ b/mm/tcache.c
@@ -1109,9 +1109,6 @@ tcache_lru_isolate(int nid, struct page **pages, int
nr_to_isolate)
spin_lock_irq(&pni->lock);
nr_isolated = __tcache_lru_isolate(pni, pages, nr_to_isolate);
- if (!nr_isolated)
- goto unlock;
-
if (!RB_EMPTY_NODE(rbn) || !list_empty(&pni->lru)) {
spin_lock(&ni->lock);
if (!RB_EMPTY_NODE(rbn))
@@ -1123,7 +1120,7 @@ tcache_lru_isolate(int nid, struct page **pages, int
nr_to_isolate)
update_ni_rb_first(ni);
spin_unlock(&ni->lock);
}
-unlock:
+
spin_unlock_irq(&pni->lock);
tcache_put_pool(pni->pool);
out:
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