select_bad_process() thinks a kernel thread can't have ->mm != NULL,
this is not true due to use_mm().
Change the code to check PF_KTHREAD.
Signed-off-by: Oleg Nesterov <firstname.lastname@example.org>
mm/oom_kill.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
--- MM/mm/oom_kill.c~1_FLITER_OUT_KTHREADS 2010-03-31 17:47:14.000000000 +0200
+++ MM/mm/oom_kill.c 2010-04-02 18:51:05.000000000 +0200
@@ -290,8 +290,8 @@ static struct task_struct *select_bad_pr
unsigned int points;
- /* skip the init task */
- if (is_global_init(p))
+ /* skip the init task and kthreads */
+ if (is_global_init(p) || (p->flags & PF_KTHREAD))
if (mem && !task_in_mem_cgroup(p, mem))
@@ -331,8 +331,7 @@ static struct task_struct *select_bad_pr
- * skip kernel threads and tasks which have already released
- * their mm.
+ * skip the tasks which have already released their mm.