[PATCH 8/8] af_unix: charge buffers to kmemcg

From	Vladimir Davydov <vdavydov@virtuozzo.com>
Newsgroups	linux.kernel
Subject	[PATCH 8/8] af_unix: charge buffers to kmemcg
Date	2016-05-23 15:00 +0200
Message-ID	<rBXCH-5ZQ-31@gated-at.bofh.it> (permalink)
References	<rBVrb-4Ex-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Unix sockets can consume a significant amount of system memory, hence
they should be accounted to kmemcg.

Since unix socket buffers are always allocated from process context,
all we need to do to charge them to kmemcg is set __GFP_ACCOUNT in
sock->sk_allocation mask.

Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: "David S. Miller" <davem@davemloft.net>
---
 net/unix/af_unix.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 80aa6a3e6817..022bdd3ab7d9 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -769,6 +769,7 @@ static struct sock *unix_create1(struct net *net, struct socket *sock, int kern)
 	lockdep_set_class(&sk->sk_receive_queue.lock,
 				&af_unix_sk_receive_queue_lock_key);
 
+	sk->sk_allocation	= GFP_KERNEL_ACCOUNT;
 	sk->sk_write_space	= unix_write_space;
 	sk->sk_max_ack_backlog	= net->unx.sysctl_max_dgram_qlen;
 	sk->sk_destruct		= unix_sock_destructor;
-- 
2.1.4

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[PATCH 8/8] af_unix: charge buffers to kmemcg Vladimir Davydov <vdavydov@virtuozzo.com> - 2016-05-23 15:00 +0200
  Re: [PATCH 8/8] af_unix: charge buffers to kmemcg David Miller <davem@davemloft.net> - 2016-05-24 00:20 +0200
  Re: [PATCH 8/8] af_unix: charge buffers to kmemcg Vladimir Davydov <vdavydov@virtuozzo.com> - 2016-05-24 10:00 +0200

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