oom: move oom_adj value from task_struct to signal_struct

[net-next-2.6.git] / mm / oom_kill.c

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index da4c342f26411a871cb9cc8076aa189f517f8639..630b77fe862f00fe6062908c72706e06cf17c3ae 100644 (file)
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -58,6 +58,10 @@ unsigned long badness(struct task_struct *p, unsigned long uptime)
        unsigned long points, cpu_time, run_time;
        struct mm_struct *mm;
        struct task_struct *child;
+       int oom_adj = p->signal->oom_adj;
+
+       if (oom_adj == OOM_DISABLE)
+               return 0;
 
        task_lock(p);
        mm = p->mm;
@@ -148,15 +152,15 @@ unsigned long badness(struct task_struct *p, unsigned long uptime)
                points /= 8;
 
        /*
-        * Adjust the score by oomkilladj.
+        * Adjust the score by oom_adj.
         */
-       if (p->oomkilladj) {
-               if (p->oomkilladj > 0) {
+       if (oom_adj) {
+               if (oom_adj > 0) {
                        if (!points)
                                points = 1;
-                       points <<= p->oomkilladj;
+                       points <<= oom_adj;
                } else
-                       points >>= -(p->oomkilladj);
+                       points >>= -(oom_adj);
        }
 
 #ifdef DEBUG
@@ -251,7 +255,7 @@ static struct task_struct *select_bad_process(unsigned long *ppoints,
                        *ppoints = ULONG_MAX;
                }
 
-               if (p->oomkilladj == OOM_DISABLE)
+               if (p->signal->oom_adj == OOM_DISABLE)
                        continue;
 
                points = badness(p, uptime.tv_sec);
@@ -304,7 +308,7 @@ static void dump_tasks(const struct mem_cgroup *mem)
                }
                printk(KERN_INFO "[%5d] %5d %5d %8lu %8lu %3d     %3d %s\n",
                       p->pid, __task_cred(p)->uid, p->tgid, mm->total_vm,
-                      get_mm_rss(mm), (int)task_cpu(p), p->oomkilladj,
+                      get_mm_rss(mm), (int)task_cpu(p), p->signal->oom_adj,
                       p->comm);
                task_unlock(p);
        } while_each_thread(g, p);
@@ -359,18 +363,9 @@ static int oom_kill_task(struct task_struct *p)
         * change to NULL at any time since we do not hold task_lock(p).
         * However, this is of no concern to us.
         */
-
-       if (mm == NULL)
+       if (!mm || p->signal->oom_adj == OOM_DISABLE)
                return 1;
 
-       /*
-        * Don't kill the process if any threads are set to OOM_DISABLE
-        */
-       do_each_thread(g, q) {
-               if (q->mm == mm && q->oomkilladj == OOM_DISABLE)
-                       return 1;
-       } while_each_thread(g, q);
-
        __oom_kill_task(p, 1);
 
        /*
@@ -394,8 +389,9 @@ static int oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
 
        if (printk_ratelimit()) {
                printk(KERN_WARNING "%s invoked oom-killer: "
-                       "gfp_mask=0x%x, order=%d, oomkilladj=%d\n",
-                       current->comm, gfp_mask, order, current->oomkilladj);
+                       "gfp_mask=0x%x, order=%d, oom_adj=%d\n",
+                       current->comm, gfp_mask, order,
+                       current->signal->oom_adj);
                task_lock(current);
                cpuset_print_task_mems_allowed(current);
                task_unlock(current);