#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;
* 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
* 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;
* 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;
/*
* 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;
/*
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;
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;
}
/**
+ * dump_tasks - dump current memory state of all system tasks
+ * @mem: target memory controller
+ *
* Dumps the current memory state of all system tasks, excluding kernel threads.
* State information includes task's pid, uid, tgid, vm size, rss, cpu, oom_adj
* score, and name.
} while_each_thread(g, p);
}
-/**
+/*
* 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
* set.
return oom_kill_task(p);
}
-#ifdef CONFIG_CGROUP_MEM_CONT
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR
void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask)
{
unsigned long points = 0;
struct task_struct *p;
cgroup_lock();
- rcu_read_lock();
+ read_lock(&tasklist_lock);
retry:
p = select_bad_process(&points, mem);
if (PTR_ERR(p) == -1UL)
"Memory cgroup out of memory"))
goto retry;
out:
- rcu_read_unlock();
+ read_unlock(&tasklist_lock);
cgroup_unlock();
}
#endif
* 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;
* 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);
}
/**
* out_of_memory - kill the "best" process when we run out of memory
+ * @zonelist: zonelist pointer
+ * @gfp_mask: memory allocation flags
+ * @order: amount of memory being requested as a power of 2
*
* If we run out of memory, we have the choice between either
* killing a random task (bad), letting the system crash (worse)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff