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| author | Pavel Emelyanov <xemul@openvz.org> | 2008-03-19 17:00:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-03-19 18:53:35 -0700 |
| commit | 52ea27eb4cd5f250f33638029a134ff03c5e6bbb (patch) | |
| tree | 56397e15561f77a3aed272c006c275e63f611091 /mm | |
| parent | 0cf01f6685bef41dea37bbec606f375b7a98fd98 (diff) | |
| download | lwn-52ea27eb4cd5f250f33638029a134ff03c5e6bbb.tar.gz lwn-52ea27eb4cd5f250f33638029a134ff03c5e6bbb.zip | |
memcgroup: fix check for thread being a group leader in memcgroup
The check t->pid == t->pid is not the blessed way to check whether a task is a
group leader.
This is not about the code beautifulness only, but about pid namespaces fixes
- both the tgid and the pid fields on the task_struct are (slowly :( )
becoming deprecated.
Besides, the thread_group_leader() macro makes only one dereference :)
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: 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 'mm')
| -rw-r--r-- | mm/memcontrol.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 8b9f6cae938e..9b648bd63451 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1079,7 +1079,7 @@ static void mem_cgroup_move_task(struct cgroup_subsys *ss, * Only thread group leaders are allowed to migrate, the mm_struct is * in effect owned by the leader */ - if (p->tgid != p->pid) + if (!thread_group_leader(p)) goto out; css_get(&mem->css); |