[PATCH v2 8/9] Display current tcp memory allocation in kmem cgroup
flat view
STALE5512d
From: Glauber Costa <hidden>
Date: 2011-09-07 04:26:17
Also in:
linux-mm, lkml
Subsystem:
networking [general], networking [tcp], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Neal Cardwell, Linus Torvalds
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 <redacted> CC: David S. Miller <davem@davemloft.net> CC: Hiroyouki Kamezawa <redacted> CC: Eric W. Biederman <redacted> --- 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)
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1.7.6
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