/*
* 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
} 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
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
{
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
/* 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");
}
* 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;
/* 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) {
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);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff