return 0;
}
- /*
- * swapoff can easily use up all memory, so kill those first.
- */
- if (p->flags & PF_SWAPOFF)
- return ULONG_MAX;
-
/*
* The memory size of the process is the basis for the badness.
*/
*/
task_unlock(p);
+ /*
+ * swapoff can easily use up all memory, so kill those first.
+ */
+ if (p->flags & PF_SWAPOFF)
+ return ULONG_MAX;
+
/*
* Processes which fork a lot of child processes are likely
* a good choice. We add half the vmsize of the children if they
* Adjust the score by oomkilladj.
*/
if (p->oomkilladj) {
- if (p->oomkilladj > 0)
+ if (p->oomkilladj > 0) {
+ if (!points)
+ points = 1;
points <<= p->oomkilladj;
- else
+ } else
points >>= -(p->oomkilladj);
}
{
#ifdef CONFIG_NUMA
struct zone **z;
- nodemask_t nodes = node_online_map;
+ nodemask_t nodes;
+ int node;
+
+ nodes_clear(nodes);
+ /* node has memory ? */
+ for_each_online_node(node)
+ if (NODE_DATA(node)->node_present_pages)
+ node_set(node, nodes);
for (z = zonelist->zones; *z; z++)
- if (cpuset_zone_allowed(*z, gfp_mask))
+ if (cpuset_zone_allowed_softwall(*z, gfp_mask))
node_clear(zone_to_nid(*z), nodes);
else
return CONSTRAINT_CPUSET;
* Don't kill the process if any threads are set to OOM_DISABLE
*/
do_each_thread(g, q) {
- if (q->mm == mm && p->oomkilladj == OOM_DISABLE)
+ if (q->mm == mm && q->oomkilladj == OOM_DISABLE)
return 1;
} while_each_thread(g, q);
/*
* kill all processes that share the ->mm (i.e. all threads),
- * but are in a different thread group.
+ * but are in a different thread group. Don't let them have access
+ * to memory reserves though, otherwise we might deplete all memory.
*/
do_each_thread(g, q) {
if (q->mm == mm && q->tgid != p->tgid)
- __oom_kill_task(q, 1);
+ force_sig(SIGKILL, q);
} while_each_thread(g, q);
return 0;
struct task_struct *p;
unsigned long points = 0;
unsigned long freed = 0;
+ int constraint;
blocking_notifier_call_chain(&oom_notify_list, 0, &freed);
if (freed > 0)
show_mem();
}
- cpuset_lock();
- read_lock(&tasklist_lock);
+ if (sysctl_panic_on_oom == 2)
+ 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.
*/
- switch (constrained_alloc(zonelist, gfp_mask)) {
+ constraint = constrained_alloc(zonelist, gfp_mask);
+ cpuset_lock();
+ read_lock(&tasklist_lock);
+
+ switch (constraint) {
case CONSTRAINT_MEMORY_POLICY:
oom_kill_process(current, points,
"No available memory (MPOL_BIND)");