oom: remove child->mm check from oom_kill_process()

The current "child->mm == p->mm" check prevents selection of vfork()ed
task.  But we don't have any reason to don't consider vfork().

Removed.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: David Rientjes <rientjes@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 342d4333f71872dcf056c8a6db0e237172124ab4..942861bf91774fc7f706ee8d19cd8f150a18e987 100644 (file)
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -479,9 +479,6 @@ static int oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
                list_for_each_entry(child, &t->children, sibling) {
                        unsigned long child_points;
 
-                       if (child->mm == p->mm)
-                               continue;
-
                        /* badness() returns 0 if the thread is unkillable */
                        child_points = badness(child, mem, nodemask,
                                               uptime.tv_sec);