Merge tag 'pm-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

[firefly-linux-kernel-4.4.55.git] / mm / oom_kill.c

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 37ab4c5ab6e8fc2210bc4442693b05bafa884cb1..18f1ae2b45de6d45f64cf13b4490b2da62dd2fb5 100644 (file)
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -44,48 +44,6 @@ int sysctl_oom_kill_allocating_task;
 int sysctl_oom_dump_tasks = 1;
 static DEFINE_SPINLOCK(zone_scan_lock);
 
-/*
- * compare_swap_oom_score_adj() - compare and swap current's oom_score_adj
- * @old_val: old oom_score_adj for compare
- * @new_val: new oom_score_adj for swap
- *
- * Sets the oom_score_adj value for current to @new_val iff its present value is
- * @old_val.  Usually used to reinstate a previous value to prevent racing with
- * userspacing tuning the value in the interim.
- */
-void compare_swap_oom_score_adj(short old_val, short new_val)
-{
-       struct sighand_struct *sighand = current->sighand;
-
-       spin_lock_irq(&sighand->siglock);
-       if (current->signal->oom_score_adj == old_val)
-               current->signal->oom_score_adj = new_val;
-       trace_oom_score_adj_update(current);
-       spin_unlock_irq(&sighand->siglock);
-}
-
-/**
- * test_set_oom_score_adj() - set current's oom_score_adj and return old value
- * @new_val: new oom_score_adj value
- *
- * Sets the oom_score_adj value for current to @new_val with proper
- * synchronization and returns the old value.  Usually used to temporarily
- * set a value, save the old value in the caller, and then reinstate it later.
- */
-short test_set_oom_score_adj(short new_val)
-{
-       struct sighand_struct *sighand = current->sighand;
-       int old_val;
-
-       spin_lock_irq(&sighand->siglock);
-       old_val = current->signal->oom_score_adj;
-       current->signal->oom_score_adj = new_val;
-       trace_oom_score_adj_update(current);
-       spin_unlock_irq(&sighand->siglock);
-
-       return old_val;
-}
-
 #ifdef CONFIG_NUMA
 /**
  * has_intersects_mems_allowed() - check task eligiblity for kill
@@ -310,6 +268,13 @@ enum oom_scan_t oom_scan_process_thread(struct task_struct *task,
        if (!task->mm)
                return OOM_SCAN_CONTINUE;
 
+       /*
+        * If task is allocating a lot of memory and has been marked to be
+        * killed first if it triggers an oom, then select it.
+        */
+       if (oom_task_origin(task))
+               return OOM_SCAN_SELECT;
+
        if (task->flags & PF_EXITING && !force_kill) {
                /*
                 * If this task is not being ptraced on exit, then wait for it