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memcg: enable accounting for inet_bin_bucket cache

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net namespace can create up to 64K tcp and dccp ports and force kernel
to allocate up to several megabytes of memory per netns
for inet_bind_bucket objects.

It makes sense to account for them to restrict the host's memory
consumption from inside the memcg-limited container.

Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vasily Averin 2021-07-19 13:44:37 +03:00 committed by David S. Miller
parent 6126891c6d
commit 990c74e3f4
2 changed files with 4 additions and 2 deletions
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2
net/dccp/proto.c
View File

@ -1126,7 +1126,7 @@ static int __init dccp_init(void)
dccp_hashinfo.bind_bucket_cachep =
kmem_cache_create("dccp_bind_bucket",
sizeof(struct inet_bind_bucket), 0,
SLAB_HWCACHE_ALIGN, NULL);
SLAB_HWCACHE_ALIGN | SLAB_ACCOUNT, NULL);
if (!dccp_hashinfo.bind_bucket_cachep)
goto out_free_hashinfo2;

4
net/ipv4/tcp.c
View File

@ -4512,7 +4512,9 @@ void __init tcp_init(void)
tcp_hashinfo.bind_bucket_cachep =
kmem_cache_create("tcp_bind_bucket",
sizeof(struct inet_bind_bucket), 0,
SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
SLAB_HWCACHE_ALIGN | SLAB_PANIC |
SLAB_ACCOUNT,
NULL);
/* Size and allocate the main established and bind bucket
* hash tables.