[PATCH 4.4 06/16] cpuset: Fix incorrect memory_pressure control file mapping

Greg Kroah-Hartman
2017-09-05T07:28:11Z

From: Waiman Long <longman@redhat.com>

commit 1c08c22c874ac88799cab1f78c40f46110274915 upstream.

The memory_pressure control file was incorrectly set up without
a private value (0, by default). As a result, this control
file was treated like memory_migrate on read. By adding back the
FILE_MEMORY_PRESSURE private value, the correct memory pressure value
will be returned.

Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: 7dbdb199d3bf ("cgroup: replace cftype->mode with CFTYPE_WORLD_WRITABLE")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
kernel/cpuset.c | 1 +
1 file changed, 1 insertion(+)

--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1910,6 +1910,7 @@ static struct cftype files[] = {
{
.name = "memory_pressure",
.read_u64 = cpuset_read_u64,
+ .private = FILE_MEMORY_PRESSURE,
},

{