mm/oom_kill.c: fix badness() kerneldoc

[linux-2.6-omap-h63xx.git] / mm / oom_kill.c

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index beb592fe9389ffa9fe34c8c92ca82ada55abd960..a0a01902f551dd45b19385b64435ec6708db249d 100644 (file)
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -26,6 +26,7 @@
 #include <linux/module.h>
 #include <linux/notifier.h>
 #include <linux/memcontrol.h>
+#include <linux/security.h>
 
 int sysctl_panic_on_oom;
 int sysctl_oom_kill_allocating_task;
@@ -37,7 +38,6 @@ static DEFINE_SPINLOCK(zone_scan_mutex);
  * badness - calculate a numeric value for how bad this task has been
  * @p: task struct of which task we should calculate
  * @uptime: current uptime in seconds
- * @mem: target memory controller
  *
  * The formula used is relatively simple and documented inline in the
  * function. The main rationale is that we want to select a good task
@@ -53,8 +53,7 @@ static DEFINE_SPINLOCK(zone_scan_mutex);
  *    of least surprise ... (be careful when you change it)
  */
 
-unsigned long badness(struct task_struct *p, unsigned long uptime,
-                       struct mem_cgroup *mem)
+unsigned long badness(struct task_struct *p, unsigned long uptime)
 {
        unsigned long points, cpu_time, run_time, s;
        struct mm_struct *mm;
@@ -129,7 +128,8 @@ unsigned long badness(struct task_struct *p, unsigned long uptime,
         * Superuser processes are usually more important, so we make it
         * less likely that we kill those.
         */
-       if (__capable(p, CAP_SYS_ADMIN) || __capable(p, CAP_SYS_RESOURCE))
+       if (has_capability(p, CAP_SYS_ADMIN) ||
+           has_capability(p, CAP_SYS_RESOURCE))
                points /= 4;
 
        /*
@@ -138,7 +138,7 @@ unsigned long badness(struct task_struct *p, unsigned long uptime,
         * tend to only have this flag set on applications they think
         * of as important.
         */
-       if (__capable(p, CAP_SYS_RAWIO))
+       if (has_capability(p, CAP_SYS_RAWIO))
                points /= 4;
 
        /*
@@ -175,12 +175,14 @@ static inline enum oom_constraint constrained_alloc(struct zonelist *zonelist,
                                                    gfp_t gfp_mask)
 {
 #ifdef CONFIG_NUMA
-       struct zone **z;
+       struct zone *zone;
+       struct zoneref *z;
+       enum zone_type high_zoneidx = gfp_zone(gfp_mask);
        nodemask_t nodes = node_states[N_HIGH_MEMORY];
 
-       for (z = zonelist->zones; *z; z++)
-               if (cpuset_zone_allowed_softwall(*z, gfp_mask))
-                       node_clear(zone_to_nid(*z), nodes);
+       for_each_zone_zonelist(zone, z, zonelist, high_zoneidx)
+               if (cpuset_zone_allowed_softwall(zone, gfp_mask))
+                       node_clear(zone_to_nid(zone), nodes);
                else
                        return CONSTRAINT_CPUSET;
 
@@ -254,7 +256,7 @@ static struct task_struct *select_bad_process(unsigned long *ppoints,
                if (p->oomkilladj == OOM_DISABLE)
                        continue;
 
-               points = badness(p, uptime.tv_sec, mem);
+               points = badness(p, uptime.tv_sec);
                if (points > *ppoints || !chosen) {
                        chosen = p;
                        *ppoints = points;
@@ -292,6 +294,8 @@ static void dump_tasks(const struct mem_cgroup *mem)
                        continue;
                if (mem && !task_in_mem_cgroup(p, mem))
                        continue;
+               if (!thread_group_leader(p))
+                       continue;
 
                task_lock(p);
                printk(KERN_INFO "[%5d] %5d %5d %8lu %8lu %3d     %3d %s\n",
@@ -460,29 +464,29 @@ EXPORT_SYMBOL_GPL(unregister_oom_notifier);
  * if a parallel OOM killing is already taking place that includes a zone in
  * the zonelist.  Otherwise, locks all zones in the zonelist and returns 1.
  */
-int try_set_zone_oom(struct zonelist *zonelist)
+int try_set_zone_oom(struct zonelist *zonelist, gfp_t gfp_mask)
 {
-       struct zone **z;
+       struct zoneref *z;
+       struct zone *zone;
        int ret = 1;
 
-       z = zonelist->zones;
-
        spin_lock(&zone_scan_mutex);
-       do {
-               if (zone_is_oom_locked(*z)) {
+       for_each_zone_zonelist(zone, z, zonelist, gfp_zone(gfp_mask)) {
+               if (zone_is_oom_locked(zone)) {
                        ret = 0;
                        goto out;
                }
-       } while (*(++z) != NULL);
+       }
+
+       for_each_zone_zonelist(zone, z, zonelist, gfp_zone(gfp_mask)) {
+               /*
+                * Lock each zone in the zonelist under zone_scan_mutex so a
+                * parallel invocation of try_set_zone_oom() doesn't succeed
+                * when it shouldn't.
+                */
+               zone_set_flag(zone, ZONE_OOM_LOCKED);
+       }
 
-       /*
-        * Lock each zone in the zonelist under zone_scan_mutex so a parallel
-        * invocation of try_set_zone_oom() doesn't succeed when it shouldn't.
-        */
-       z = zonelist->zones;
-       do {
-               zone_set_flag(*z, ZONE_OOM_LOCKED);
-       } while (*(++z) != NULL);
 out:
        spin_unlock(&zone_scan_mutex);
        return ret;
@@ -493,16 +497,15 @@ out:
  * allocation attempts with zonelists containing them may now recall the OOM
  * killer, if necessary.
  */
-void clear_zonelist_oom(struct zonelist *zonelist)
+void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_mask)
 {
-       struct zone **z;
-
-       z = zonelist->zones;
+       struct zoneref *z;
+       struct zone *zone;
 
        spin_lock(&zone_scan_mutex);
-       do {
-               zone_clear_flag(*z, ZONE_OOM_LOCKED);
-       } while (*(++z) != NULL);
+       for_each_zone_zonelist(zone, z, zonelist, gfp_zone(gfp_mask)) {
+               zone_clear_flag(zone, ZONE_OOM_LOCKED);
+       }
        spin_unlock(&zone_scan_mutex);
 }