From: Vasily Averin <vvs@virtuozzo.com>
To: cgroups@vger.kernel.org, linux-mm@kvack.org
Cc: Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@kernel.org>,
Vladimir Davydov <vdavydov.dev@gmail.com>
Subject: [PATCH 7/9] memcg: accounting for mnt_cache entries
Date: Tue, 9 Mar 2021 11:04:39 +0300 [thread overview]
Message-ID: <a8495a6e-3f9a-c4ac-8692-97a4479e2faa@virtuozzo.com> (raw)
Objects can be created from memcg-limited tasks
but its misuse may lead to host OOM.
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
---
fs/namespace.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/namespace.c b/fs/namespace.c
index 56bb5a5..d550c2a 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -203,7 +203,8 @@ static struct mount *alloc_vfsmnt(const char *name)
goto out_free_cache;
if (name) {
- mnt->mnt_devname = kstrdup_const(name, GFP_KERNEL);
+ mnt->mnt_devname = kstrdup_const(name,
+ GFP_KERNEL_ACCOUNT);
if (!mnt->mnt_devname)
goto out_free_id;
}
@@ -4213,7 +4214,7 @@ void __init mnt_init(void)
int err;
mnt_cache = kmem_cache_create("mnt_cache", sizeof(struct mount),
- 0, SLAB_HWCACHE_ALIGN | SLAB_PANIC, NULL);
+ 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT, NULL);
mount_hashtable = alloc_large_system_hash("Mount-cache",
sizeof(struct hlist_head),
--
1.8.3.1
reply other threads:[~2021-03-09 8:04 UTC|newest]
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