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authorGowrishankar M <gowrishankar.m@in.ibm.com>2009-01-07 18:07:43 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-08 08:31:03 -0800
commite7b80bb695a5b64c92e314838e083b2f3bdf29b2 (patch)
treef5eafb9825a23550dbf903e5cabd71655e4e55ce /kernel
parentc12f65d4396e05c51ce3af7f159ead98574a587c (diff)
downloadop-kernel-dev-e7b80bb695a5b64c92e314838e083b2f3bdf29b2.zip
op-kernel-dev-e7b80bb695a5b64c92e314838e083b2f3bdf29b2.tar.gz
cgroups: skip processes from other namespaces when listing a cgroup
Once tasks are populated from system namespace inside cgroup, container replaces other namespace task with 0 while listing tasks, inside container. Though this is expected behaviour from container end, there is no use of showing unwanted 0s. In this patch, we check if a process is in same namespace before loading into pid array. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Gowrishankar M <gowrishankar.m@in.ibm.com> Acked-by: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/cgroup.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 4c475ce..cb7c72b 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -2007,14 +2007,16 @@ int cgroup_scan_tasks(struct cgroup_scanner *scan)
*/
static int pid_array_load(pid_t *pidarray, int npids, struct cgroup *cgrp)
{
- int n = 0;
+ int n = 0, pid;
struct cgroup_iter it;
struct task_struct *tsk;
cgroup_iter_start(cgrp, &it);
while ((tsk = cgroup_iter_next(cgrp, &it))) {
if (unlikely(n == npids))
break;
- pidarray[n++] = task_pid_vnr(tsk);
+ pid = task_pid_vnr(tsk);
+ if (pid > 0)
+ pidarray[n++] = pid;
}
cgroup_iter_end(cgrp, &it);
return n;
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