@@ -79,6 +79,7 @@ Brief summary of control files.
memory.independent_kmem_limit # select whether or not kernel memory limits are
independent of user limits
memory.kmem.tcp.max_memory # set/show hard limit for tcp buf memory
+ memory.kmem.tcp.current_memory # show current tcp buf memory allocation
1. History
@@ -482,12 +482,29 @@ 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 mem_cgroup *sg = mem_cgroup_from_cont(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 = "kmem.tcp.max_memory",
.write_u64 = tcp_write_maxmem,
.read_u64 = tcp_read_maxmem,
},
+ {
+ .name = "kmem.tcp.current_memory",
+ .read_u64 = tcp_read_curmem,
+ },
};
/*
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@parallels.com> CC: David S. Miller <davem@davemloft.net> CC: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com> CC: Eric W. Biederman <ebiederm@xmission.com> --- Documentation/cgroups/memory.txt | 1 + mm/memcontrol.c | 17 +++++++++++++++++ 2 files changed, 18 insertions(+), 0 deletions(-)