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foundations of per-cgroup memory pressure controlling.

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This patch replaces all uses of struct sock fields' memory_pressure,
memory_allocated, sockets_allocated, and sysctl_mem to acessor
macros. Those macros can either receive a socket argument, or a mem_cgroup
argument, depending on the context they live in.

Since we're only doing a macro wrapping here, no performance impact at all is
expected in the case where we don't have cgroups disabled.

Signed-off-by: Glauber Costa <glommer@parallels.com>
Reviewed-by: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com>
CC: David S. Miller <davem@davemloft.net>
CC: Eric W. Biederman <ebiederm@xmission.com>
CC: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Glauber Costa
2011-12-11 21:47:02 +00:00
committed by David S. Miller
parent e5671dfae5
commit 180d8cd942
9 changed files with 145 additions and 39 deletions
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2
net/ipv4/tcp_timer.c
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@@ -261,7 +261,7 @@ static void tcp_delack_timer(unsigned long data)
}
out:
if (tcp_memory_pressure)
if (sk_under_memory_pressure(sk))
sk_mem_reclaim(sk);
out_unlock:
bh_unlock_sock(sk);