1 files changed, 71 insertions, 32 deletions

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index ea2147dabba6..f52481b1c1e5 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -196,27 +196,46 @@ unsigned long badness(struct task_struct *p, unsigned long uptime)
 /*
  * Determine the type of allocation constraint.
  */
-static inline enum oom_constraint constrained_alloc(struct zonelist *zonelist,
-						    gfp_t gfp_mask)
-{
 #ifdef CONFIG_NUMA
+static enum oom_constraint constrained_alloc(struct zonelist *zonelist,
+				    gfp_t gfp_mask, nodemask_t *nodemask)
+{
 	struct zone *zone;
 	struct zoneref *z;
 	enum zone_type high_zoneidx = gfp_zone(gfp_mask);
-	nodemask_t nodes = node_states[N_HIGH_MEMORY];
 
-	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;
+	/*
+	 * Reach here only when __GFP_NOFAIL is used. So, we should avoid
+	 * to kill current.We have to random task kill in this case.
+	 * Hopefully, CONSTRAINT_THISNODE...but no way to handle it, now.
+	 */
+	if (gfp_mask & __GFP_THISNODE)
+		return CONSTRAINT_NONE;
 
-	if (!nodes_empty(nodes))
+	/*
+	 * The nodemask here is a nodemask passed to alloc_pages(). Now,
+	 * cpuset doesn't use this nodemask for its hardwall/softwall/hierarchy
+	 * feature. mempolicy is an only user of nodemask here.
+	 * check mempolicy's nodemask contains all N_HIGH_MEMORY
+	 */
+	if (nodemask && !nodes_subset(node_states[N_HIGH_MEMORY], *nodemask))
 		return CONSTRAINT_MEMORY_POLICY;
-#endif
 
+	/* Check this allocation failure is caused by cpuset's wall function */
+	for_each_zone_zonelist_nodemask(zone, z, zonelist,
+			high_zoneidx, nodemask)
+		if (!cpuset_zone_allowed_softwall(zone, gfp_mask))
+			return CONSTRAINT_CPUSET;
+
+	return CONSTRAINT_NONE;
+}
+#else
+static enum oom_constraint constrained_alloc(struct zonelist *zonelist,
+				gfp_t gfp_mask, nodemask_t *nodemask)
+{
 	return CONSTRAINT_NONE;
 }
+#endif
 
 /*
  * Simple selection loop. We chose the process with the highest
@@ -337,6 +356,24 @@ static void dump_tasks(const struct mem_cgroup *mem)
 	} while_each_thread(g, p);
 }
 
+static void dump_header(struct task_struct *p, gfp_t gfp_mask, int order,
+							struct mem_cgroup *mem)
+{
+	pr_warning("%s invoked oom-killer: 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);
+	dump_stack();
+	mem_cgroup_print_oom_info(mem, p);
+	show_mem();
+	if (sysctl_oom_dump_tasks)
+		dump_tasks(mem);
+}
+
+#define K(x) ((x) << (PAGE_SHIFT-10))
+
 /*
  * Send SIGKILL to the selected  process irrespective of  CAP_SYS_RAW_IO
  * flag though it's unlikely that  we select a process with CAP_SYS_RAW_IO
@@ -350,15 +387,23 @@ static void __oom_kill_task(struct task_struct *p, int verbose)
 		return;
 	}
 
+	task_lock(p);
 	if (!p->mm) {
 		WARN_ON(1);
-		printk(KERN_WARNING "tried to kill an mm-less task!\n");
+		printk(KERN_WARNING "tried to kill an mm-less task %d (%s)!\n",
+			task_pid_nr(p), p->comm);
+		task_unlock(p);
 		return;
 	}
 
 	if (verbose)
-		printk(KERN_ERR "Killed process %d (%s)\n",
-				task_pid_nr(p), p->comm);
+		printk(KERN_ERR "Killed process %d (%s) "
+		       "vsz:%lukB, anon-rss:%lukB, file-rss:%lukB\n",
+		       task_pid_nr(p), p->comm,
+		       K(p->mm->total_vm),
+		       K(get_mm_counter(p->mm, anon_rss)),
+		       K(get_mm_counter(p->mm, file_rss)));
+	task_unlock(p);
 
 	/*
 	 * We give our sacrificial lamb high priority and access to
@@ -395,20 +440,8 @@ static int oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
 {
 	struct task_struct *c;
 
-	if (printk_ratelimit()) {
-		printk(KERN_WARNING "%s invoked oom-killer: "
-			"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);
-		dump_stack();
-		mem_cgroup_print_oom_info(mem, current);
-		show_mem();
-		if (sysctl_oom_dump_tasks)
-			dump_tasks(mem);
-	}
+	if (printk_ratelimit())
+		dump_header(p, gfp_mask, order, mem);
 
 	/*
 	 * If the task is already exiting, don't alarm the sysadmin or kill
@@ -544,6 +577,7 @@ retry:
 	/* Found nothing?!?! Either we hang forever, or we panic. */
 	if (!p) {
 		read_unlock(&tasklist_lock);
+		dump_header(NULL, gfp_mask, order, NULL);
 		panic("Out of memory and no killable processes...\n");
 	}
 
@@ -599,7 +633,8 @@ rest_and_return:
  * OR try to be smart about which process to kill. Note that we
  * don't have to be perfect here, we just have to be good.
  */
-void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order)
+void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask,
+		int order, nodemask_t *nodemask)
 {
 	unsigned long freed = 0;
 	enum oom_constraint constraint;
@@ -609,14 +644,16 @@ void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order)
 		/* Got some memory back in the last second. */
 		return;
 
-	if (sysctl_panic_on_oom == 2)
+	if (sysctl_panic_on_oom == 2) {
+		dump_header(NULL, gfp_mask, order, NULL);
 		panic("out of memory. Compulsory panic_on_oom is selected.\n");
+	}
 
 	/*
 	 * Check if there were limitations on the allocation (only relevant for
 	 * NUMA) that may require different handling.
 	 */
-	constraint = constrained_alloc(zonelist, gfp_mask);
+	constraint = constrained_alloc(zonelist, gfp_mask, nodemask);
 	read_lock(&tasklist_lock);
 
 	switch (constraint) {
@@ -626,8 +663,10 @@ void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order)
 		break;
 
 	case CONSTRAINT_NONE:
-		if (sysctl_panic_on_oom)
+		if (sysctl_panic_on_oom) {
+			dump_header(NULL, gfp_mask, order, NULL);
 			panic("out of memory. panic_on_oom is selected\n");
+		}
 		/* Fall-through */
 	case CONSTRAINT_CPUSET:
 		__out_of_memory(gfp_mask, order);