[RFC PATCH] mm/oom_kill: allow oom kill allocating task for non-global case

From: Aaron Tomlin
Date: Mon Jun 07 2021 - 12:33:35 EST


At the present time, in the context of memcg OOM, even when
sysctl_oom_kill_allocating_task is enabled/or set, the "allocating"
task cannot be selected, as a target for the OOM killer.

This patch removes the restriction entirely.

Signed-off-by: Aaron Tomlin <atomlin@xxxxxxxxxx>
---
mm/oom_kill.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index eefd3f5fde46..3bae33e2d9c2 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -1089,9 +1089,9 @@ bool out_of_memory(struct oom_control *oc)
oc->nodemask = NULL;
check_panic_on_oom(oc);

- if (!is_memcg_oom(oc) && sysctl_oom_kill_allocating_task &&
- current->mm && !oom_unkillable_task(current) &&
- oom_cpuset_eligible(current, oc) &&
+ if (sysctl_oom_kill_allocating_task && current->mm &&
+ !oom_unkillable_task(current) &&
+ oom_cpuset_eligible(current, oc) &&
current->signal->oom_score_adj != OOM_SCORE_ADJ_MIN) {
get_task_struct(current);
oc->chosen = current;
--
2.26.3