The patch titled
Subject: mm, oom: OOM sysrq should always kill a process
has been added to the -mm tree. Its filename is
mm-oom-oom-sysrq-should-always-kill-a-process.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-oom-oom-sysrq-should-always-kill-a-process.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-oom-oom-sysrq-should-always-kill-a-process.patch
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------------------------------------------------------
From: Jann Horn <jannh@xxxxxxxxxx>
Subject: mm, oom: OOM sysrq should always kill a process
The OOM kill sysrq (alt+sysrq+F) should allow the user to kill the process
with the highest OOM badness with a single execution.
However, at the moment, the OOM kill can bail out if an OOM notifier (e.g.
the i915 one) says that it reclaimed a tiny amount of memory from
somewhere. That's probably not what the user wants, so skip the bailout
if the OOM was triggered via sysrq.
Link: https://lkml.kernel.org/r/20220106102605.635656-1-jannh@xxxxxxxxxx
Signed-off-by: Jann Horn <jannh@xxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/oom_kill.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/oom_kill.c~mm-oom-oom-sysrq-should-always-kill-a-process
+++ a/mm/oom_kill.c
@@ -1058,7 +1058,7 @@ bool out_of_memory(struct oom_control *o
if (!is_memcg_oom(oc)) {
blocking_notifier_call_chain(&oom_notify_list, 0, &freed);
- if (freed > 0)
+ if (freed > 0 && !is_sysrq_oom(oc))
/* Got some memory back in the last second. */
return true;
}
_
Patches currently in -mm which might be from jannh@xxxxxxxxxx are
mm-oom-oom-sysrq-should-always-kill-a-process.patch
