[PATCH] oom: skip frozen tasks

[Konstantin Khlebnikov]

All frozen tasks are unkillable, and if one of them has TIF_MEMDIE
we must kill something else to avoid deadlock. After this patch
select_bad_process() will skip frozen task before checking TIF_MEMDIE.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx>
---
 mm/oom_kill.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 626303b..931ab20 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -138,6 +138,8 @@ static bool oom_unkillable_task(struct task_struct *p,
 		return true;
 	if (p->flags & PF_KTHREAD)
 		return true;
+	if (p->flags & PF_FROZEN)
+		return true;
 
 	/* When mem_cgroup_out_of_memory() and p is not member of the group */
 	if (mem && !task_in_mem_cgroup(p, mem))

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