From 455c0e5fb03b67fa62bd12e3abe3fa484b9960c5 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Mon, 9 Aug 2010 17:18:43 -0700 Subject: [PATCH] oom: check PF_KTHREAD instead of !mm to skip kthreads 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. Reviewed-by: KAMEZAWA Hiroyuki Signed-off-by: Oleg Nesterov Signed-off-by: David Rientjes Acked-by: KOSAKI Motohiro Cc: Balbir Singh Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/oom_kill.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 709aedfaa014..7c0dc414dba8 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -256,14 +256,11 @@ static struct task_struct *select_bad_process(unsigned long *ppoints, for_each_process(p) { unsigned long points; - /* - * skip kernel threads and tasks which have already released - * their mm. - */ + /* skip tasks that have already released their mm */ if (!p->mm) continue; - /* skip the init task */ - if (is_global_init(p)) + /* skip the init task and kthreads */ + if (is_global_init(p) || (p->flags & PF_KTHREAD)) continue; if (mem && !task_in_mem_cgroup(p, mem)) continue; -- 2.20.1