From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Sasha Levin To: gregkh@linuxfoundation.org Cc: stable@vger.kernel.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, linux-mm@kvack.org, Sasha Levin Subject: [PATCH 4.18] Revert "mm: slowly shrink slabs with a relatively small number of objects" Date: Fri, 26 Oct 2018 07:18:59 -0400 Message-Id: <20181026111859.23807-1-sashal@kernel.org> List-ID: This reverts commit 62aad93f09c1952ede86405894df1b22012fd5ab. Which was upstream commit 172b06c32b94 ("mm: slowly shrink slabs with a relatively small number of objects"). The upstream commit was found to cause regressions. While there is a proposed fix upstream, revent this patch from stable trees for now as testing the fix will take some time. Signed-off-by: Sasha Levin --- mm/vmscan.c | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index fc0436407471..03822f86f288 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -386,17 +386,6 @@ static unsigned long do_shrink_slab(struct shrink_control *shrinkctl, delta = freeable >> priority; delta *= 4; do_div(delta, shrinker->seeks); - - /* - * Make sure we apply some minimal pressure on default priority - * even on small cgroups. Stale objects are not only consuming memory - * by themselves, but can also hold a reference to a dying cgroup, - * preventing it from being reclaimed. A dying cgroup with all - * corresponding structures like per-cpu stats and kmem caches - * can be really big, so it may lead to a significant waste of memory. - */ - delta = max_t(unsigned long long, delta, min(freeable, batch_size)); - total_scan += delta; if (total_scan < 0) { pr_err("shrink_slab: %pF negative objects to delete nr=%ld\n", -- 2.17.1