Messages in this thread Patch in this message | | | From | Vladimir Davydov <> | Subject | [PATCH] vmpressure: Fix subtree pressure detection | Date | Wed, 27 Jan 2016 19:28:57 +0300 |
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When vmpressure is called for the entire subtree under pressure we mistakenly use vmpressure->scanned instead of vmpressure->tree_scanned when checking if vmpressure work is to be scheduled. This results in suppressing all vmpressure events in the legacy cgroup hierarchy. Fix it.
Fixes: 8e8ae645249b ("mm: memcontrol: hook up vmpressure to socket pressure") Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com> --- mm/vmpressure.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/mm/vmpressure.c b/mm/vmpressure.c index 9a6c0704211c..149fdf6c5c56 100644 --- a/mm/vmpressure.c +++ b/mm/vmpressure.c @@ -248,9 +248,8 @@ void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree, if (tree) { spin_lock(&vmpr->sr_lock); - vmpr->tree_scanned += scanned; + scanned = vmpr->tree_scanned += scanned; vmpr->tree_reclaimed += reclaimed; - scanned = vmpr->scanned; spin_unlock(&vmpr->sr_lock); if (scanned < vmpressure_win) -- 2.1.4
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