Home Home > GIT Browse
summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorDavid Rientjes <rientjes@google.com>2017-01-24 15:18:10 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-02-01 08:30:54 +0100
commitd0721893214ef0bee75ef45e17ce03870eb83c94 (patch)
tree1e796ff872168c02576affe94047ff2aeced4c8d
parent14b97492d6e1a8b631f3bf917fd3648f129f8c12 (diff)
mm, memcg: do not retry precharge charges
commit 3674534b775354516e5c148ea48f51d4d1909a78 upstream. When memory.move_charge_at_immigrate is enabled and precharges are depleted during move, mem_cgroup_move_charge_pte_range() will attempt to increase the size of the precharge. Prevent precharges from ever looping by setting __GFP_NORETRY. This was probably the intention of the GFP_KERNEL & ~__GFP_NORETRY, which is pointless as written. Fixes: 0029e19ebf84 ("mm: memcontrol: remove explicit OOM parameter in charge path") Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1701130208510.69402@chino.kir.corp.google.com Signed-off-by: David Rientjes <rientjes@google.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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--mm/memcontrol.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 5d9c8a3136bc..43eefe9d834c 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4496,9 +4496,9 @@ static int mem_cgroup_do_precharge(unsigned long count)
return ret;
}
- /* Try charges one by one with reclaim */
+ /* Try charges one by one with reclaim, but do not retry */
while (count--) {
- ret = try_charge(mc.to, GFP_KERNEL & ~__GFP_NORETRY, 1);
+ ret = try_charge(mc.to, GFP_KERNEL | __GFP_NORETRY, 1);
if (ret)
return ret;
mc.precharge++;