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Date: Wed, 7 Sep 2011 01:23:18 -0300 From: Glauber Costa <glommer@...allels.com> To: linux-kernel@...r.kernel.org Cc: linux-mm@...ck.org, containers@...ts.osdl.org, netdev@...r.kernel.org, xemul@...allels.com, Glauber Costa <glommer@...allels.com>, "David S. Miller" <davem@...emloft.net>, Hiroyouki Kamezawa <kamezawa.hiroyu@...fujitsu.com>, "Eric W. Biederman" <ebiederm@...ssion.com> Subject: [PATCH v2 8/9] Display current tcp memory allocation in kmem cgroup This patch introduces kmem.tcp_current_memory file, living in the kmem_cgroup filesystem. It is a simple read-only file that displays the amount of kernel memory currently consumed by the cgroup. Signed-off-by: Glauber Costa <glommer@...allels.com> CC: David S. Miller <davem@...emloft.net> CC: Hiroyouki Kamezawa <kamezawa.hiroyu@...fujitsu.com> CC: Eric W. Biederman <ebiederm@...ssion.com> --- net/ipv4/tcp.c | 17 +++++++++++++++++ 1 files changed, 17 insertions(+), 0 deletions(-) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index e1918fa..ff5c0e0 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -365,12 +365,29 @@ static u64 tcp_read_maxmem(struct cgroup *cgrp, struct cftype *cft) return ret; } +static u64 tcp_read_curmem(struct cgroup *cgrp, struct cftype *cft) +{ + struct kmem_cgroup *sg = kcg_from_cgroup(cgrp); + u64 ret; + + if (!cgroup_lock_live_group(cgrp)) + return -ENODEV; + ret = atomic_long_read(&sg->tcp_memory_allocated); + + cgroup_unlock(); + return ret; +} + static struct cftype tcp_files[] = { { .name = "tcp_maxmem", .write_u64 = tcp_write_maxmem, .read_u64 = tcp_read_maxmem, }, + { + .name = "tcp_current_memory", + .read_u64 = tcp_read_curmem, + }, }; int tcp_init_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss) -- 1.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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