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Message-ID: <20160524074156.GG7917@esperanza> Date: Tue, 24 May 2016 10:41:56 +0300 From: Vladimir Davydov <vdavydov@...tuozzo.com> To: Andrew Morton <akpm@...ux-foundation.org> CC: "David S. Miller" <davem@...emloft.net>, Johannes Weiner <hannes@...xchg.org>, Michal Hocko <mhocko@...nel.org>, <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org> Subject: Re: [PATCH 8/8] af_unix: charge buffers to kmemcg [adding netdev to Cc] On Mon, May 23, 2016 at 01:20:29PM +0300, Vladimir Davydov wrote: > 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@...tuozzo.com> > Cc: "David S. Miller" <davem@...emloft.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;
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