From: Baolin Wang <baolin.wang@linux.alibaba.com> mainline inclusion from mainline-5.15-rc1 commit 37bc3cb9bbef86d1ddbbc789e55b588c8a2cac26 category: bugfix issue: #I4NRS5 CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... Signed-off-by: Yu Changchun <yuchangchun1@huawei.com> -------------------------------- Since commit c843966c556d ("mm: allow swappiness that prefers reclaiming anon over the file workingset") has expended the swappiness value to make swap to be preferred in some systems. We should also change the memcg swappiness restriction to allow memcg swap-preferred. Link: https://lkml.kernel.org/r/d77469b90c45c49953ccbc51e54a1d465bc18f70.162762625... Fixes: c843966c556d ("mm: allow swappiness that prefers reclaiming anon over the file workingset") Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Conflicts: mm/memcontrol.c Signed-off-by: Lu Jialin <lujialin4@huawei.com> Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng@huawei.com> Signed-off-by: Chen Jun <chenjun102@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> Signed-off-by: Yu Changchun <yuchangchun1@huawei.com> --- mm/memcontrol.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 00156aebbcad..167169b3907d 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -4184,7 +4184,7 @@ static int mem_cgroup_swappiness_write(struct cgroup_subsys_state *css, { struct mem_cgroup *memcg = mem_cgroup_from_css(css); - if (val > 100) + if (val > 200) return -EINVAL; if (css->parent) -- 2.25.1