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-rw-r--r--mm/oom_kill.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 6b9e758c98a..40ba05061a4 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -429,7 +429,6 @@ void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask)
unsigned long points = 0;
struct task_struct *p;
- cgroup_lock();
read_lock(&tasklist_lock);
retry:
p = select_bad_process(&points, mem);
@@ -444,7 +443,6 @@ retry:
goto retry;
out:
read_unlock(&tasklist_lock);
- cgroup_unlock();
}
#endif
@@ -560,6 +558,13 @@ void pagefault_out_of_memory(void)
/* Got some memory back in the last second. */
return;
+ /*
+ * If this is from memcg, oom-killer is already invoked.
+ * and not worth to go system-wide-oom.
+ */
+ if (mem_cgroup_oom_called(current))
+ goto rest_and_return;
+
if (sysctl_panic_on_oom)
panic("out of memory from page fault. panic_on_oom is selected.\n");
@@ -571,6 +576,7 @@ void pagefault_out_of_memory(void)
* Give "p" a good chance of killing itself before we
* retry to allocate memory.
*/
+rest_and_return:
if (!test_thread_flag(TIF_MEMDIE))
schedule_timeout_uninterruptible(1);
}