Export the oom_evaluate_task() and select_bad_process()
functions to reuse them for victim selection logic
in the cgroup-aware OOM killer.
Signed-off-by: Roman Gushchin <guro@xxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Li Zefan <lizefan@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Cc: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Cc: kernel-team@xxxxxx
Cc: cgroups@xxxxxxxxxxxxxxx
Cc: linux-doc@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-mm@xxxxxxxxx
---
include/linux/oom.h | 3 +++
mm/oom_kill.c | 5 ++---
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/include/linux/oom.h b/include/linux/oom.h
index 47d9495..edf7a77 100644
--- a/include/linux/oom.h
+++ b/include/linux/oom.h
@@ -80,6 +80,9 @@ extern void oom_killer_enable(void);
extern struct task_struct *find_lock_task_mm(struct task_struct *p);
extern void __oom_kill_process(struct task_struct *victim);
+extern int oom_evaluate_task(struct task_struct *task, void *arg);
+extern void select_bad_process(struct oom_control *oc,
+ struct mem_cgroup *memcg);
/* sysctls */
extern int sysctl_oom_dump_tasks;
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 11b60a5..8cf77fb 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -288,7 +288,7 @@ static enum oom_constraint constrained_alloc(struct oom_control *oc)
return CONSTRAINT_NONE;
}
-static int oom_evaluate_task(struct task_struct *task, void *arg)
+int oom_evaluate_task(struct task_struct *task, void *arg)
{
struct oom_control *oc = arg;
unsigned long points;
@@ -343,8 +343,7 @@ static int oom_evaluate_task(struct task_struct *task, void *arg)
* Simple selection loop. We choose the process with the highest number of
* 'points'. In case scan was aborted, oc->chosen is set to -1.
*/
-static void select_bad_process(struct oom_control *oc,
- struct mem_cgroup *memcg)
+void select_bad_process(struct oom_control *oc, struct mem_cgroup *memcg)
{
if (memcg)
mem_cgroup_scan_tasks(memcg, oom_evaluate_task, oc);
--
2.7.4
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