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-rw-r--r--mm/oom_kill.c23
1 files changed, 5 insertions, 18 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index b0d8943bc9fd..2b97e8f04607 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -54,13 +54,7 @@ int test_set_oom_score_adj(int new_val)
spin_lock_irq(&sighand->siglock);
old_val = current->signal->oom_score_adj;
- if (new_val != old_val) {
- if (new_val == OOM_SCORE_ADJ_MIN)
- atomic_inc(&current->mm->oom_disable_count);
- else if (old_val == OOM_SCORE_ADJ_MIN)
- atomic_dec(&current->mm->oom_disable_count);
- current->signal->oom_score_adj = new_val;
- }
+ current->signal->oom_score_adj = new_val;
spin_unlock_irq(&sighand->siglock);
return old_val;
@@ -173,16 +167,6 @@ unsigned int oom_badness(struct task_struct *p, struct mem_cgroup *mem,
return 0;
/*
- * Shortcut check for a thread sharing p->mm that is OOM_SCORE_ADJ_MIN
- * so the entire heuristic doesn't need to be executed for something
- * that cannot be killed.
- */
- if (atomic_read(&p->mm->oom_disable_count)) {
- task_unlock(p);
- return 0;
- }
-
- /*
* The memory controller may have a limit of 0 bytes, so avoid a divide
* by zero, if necessary.
*/
@@ -451,6 +435,9 @@ static int oom_kill_task(struct task_struct *p, struct mem_cgroup *mem)
for_each_process(q)
if (q->mm == mm && !same_thread_group(q, p) &&
!(q->flags & PF_KTHREAD)) {
+ if (q->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
+ continue;
+
task_lock(q); /* Protect ->comm from prctl() */
pr_err("Kill process %d (%s) sharing same memory\n",
task_pid_nr(q), q->comm);
@@ -727,7 +714,7 @@ void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask,
read_lock(&tasklist_lock);
if (sysctl_oom_kill_allocating_task &&
!oom_unkillable_task(current, NULL, nodemask) &&
- current->mm && !atomic_read(&current->mm->oom_disable_count)) {
+ current->mm) {
/*
* oom_kill_process() needs tasklist_lock held. If it returns
* non-zero, current could not be killed so we must fallback to