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authorRoman Gushchin <roman.gushchin@linux.dev>2022-06-10 11:03:10 -0700
committerakpm <akpm@linux-foundation.org>2022-06-16 19:48:31 -0700
commitfc4db90fe71e640e3fe88df346f7cf653b75315d (patch)
tree031cfdd6ab6407802f6b8aef2fe60cfa0d73b84e /mm/list_lru.c
parent1e57ffb6e3fd9583268c6462c4e3853575b21701 (diff)
mm: kmem: make mem_cgroup_from_obj() vmalloc()-safe
Currently mem_cgroup_from_obj() is not working properly with objects allocated using vmalloc(). It creates problems in some cases, when it's called for static objects belonging to modules or generally allocated using vmalloc(). This patch makes mem_cgroup_from_obj() safe to be called on objects allocated using vmalloc(). It also introduces mem_cgroup_from_slab_obj(), which is a faster version to use in places when we know the object is either a slab object or a generic slab page (e.g. when adding an object to a lru list). Link: https://lkml.kernel.org/r/20220610180310.1725111-1-roman.gushchin@linux.dev Suggested-by: Kefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev> Tested-by: Linux Kernel Functional Testing <lkft@linaro.org> Acked-by: Shakeel Butt <shakeelb@google.com> Tested-by: Vasily Averin <vvs@openvz.org> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Muchun Song <songmuchun@bytedance.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Naresh Kamboju <naresh.kamboju@linaro.org> Cc: Qian Cai <quic_qiancai@quicinc.com> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: David S. Miller <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Florian Westphal <fw@strlen.de> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Michal Koutný <mkoutny@suse.com> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/list_lru.c')
-rw-r--r--mm/list_lru.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/list_lru.c b/mm/list_lru.c
index ba76428ceece..a05e5bef3b40 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -71,7 +71,7 @@ list_lru_from_kmem(struct list_lru *lru, int nid, void *ptr,
if (!list_lru_memcg_aware(lru))
goto out;
- memcg = mem_cgroup_from_obj(ptr);
+ memcg = mem_cgroup_from_slab_obj(ptr);
if (!memcg)
goto out;