[PATCH] oom: kthread infinite loop fix

Skip kernel threads, rather than having them return 0 from badness.
Theoretically, badness might truncate all results to 0, thus a kernel thread
might be picked first, causing an infinite loop.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index f1aba7e7b760..12cd4735dc29 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -207,6 +207,9 @@ static struct task_struct *select_bad_process(unsigned long *ppoints)
                 unsigned long points;
                 int releasing;
 
+                /* skip kernel threads */
+                if (!p->mm)
+                        continue;
                 /* skip the init task with pid == 1 */
                 if (p->pid == 1)
                         continue;