Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

[mv-sheeva.git] / mm / oom_kill.c

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index f52e85c80e8d554fcae1a7ad40e0617c0bb1318f..eafff89b3dd634e8836842005695c1ad48cc0cb2 100644 (file)
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -38,6 +38,33 @@ int sysctl_oom_kill_allocating_task;
 int sysctl_oom_dump_tasks = 1;
 static DEFINE_SPINLOCK(zone_scan_lock);
 
+/**
+ * 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.
+ */
+int test_set_oom_score_adj(int new_val)
+{
+       struct sighand_struct *sighand = current->sighand;
+       int old_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;
+       }
+       spin_unlock_irq(&sighand->siglock);
+
+       return old_val;
+}
+
 #ifdef CONFIG_NUMA
 /**
  * has_intersects_mems_allowed() - check task eligiblity for kill
@@ -154,15 +181,6 @@ unsigned int oom_badness(struct task_struct *p, struct mem_cgroup *mem,
                return 0;
        }
 
-       /*
-        * When the PF_OOM_ORIGIN bit is set, it indicates the task should have
-        * priority for oom killing.
-        */
-       if (p->flags & PF_OOM_ORIGIN) {
-               task_unlock(p);
-               return 1000;
-       }
-
        /*
         * The memory controller may have a limit of 0 bytes, so avoid a divide
         * by zero, if necessary.
@@ -321,8 +339,7 @@ static struct task_struct *select_bad_process(unsigned int *ppoints,
                                 * then wait for it to finish before killing
                                 * some other task unnecessarily.
                                 */
-                               if (!(task_ptrace(p->group_leader) &
-                                                       PT_TRACE_EXIT))
+                               if (!(p->group_leader->ptrace & PT_TRACE_EXIT))
                                        return ERR_PTR(-1UL);
                        }
                }
@@ -470,7 +487,7 @@ static int oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
 
        /*
         * If any of p's children has a different mm and is eligible for kill,
-        * the one with the highest badness() score is sacrificed for its
+        * the one with the highest oom_badness() score is sacrificed for its
         * parent.  This attempts to lose the minimal amount of work done while
         * still freeing memory.
         */