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authorDavid Rientjes <rientjes@google.com>2012-12-11 16:02:54 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-11 17:22:27 -0800
commita9c58b907dbc6821533dfc295b63caf111ff1f16 (patch)
treee50714c48de89400a02a8e92ef4e240c5206bbcc /mm
parentfa264375175a382621c5344a6508e02ec4d1c3c0 (diff)
mm, oom: change type of oom_score_adj to short
The maximum oom_score_adj is 1000 and the minimum oom_score_adj is -1000, so this range can be represented by the signed short type with no functional change. The extra space this frees up in struct signal_struct will be used for per-thread oom kill flags in the next patch. Signed-off-by: David Rientjes <rientjes@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reviewed-by: Michal Hocko <mhocko@suse.cz> Cc: Anton Vorontsov <anton.vorontsov@linaro.org> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/ksm.c2
-rw-r--r--mm/oom_kill.c10
-rw-r--r--mm/swapfile.c2
3 files changed, 7 insertions, 7 deletions
diff --git a/mm/ksm.c b/mm/ksm.c
index 31ae5ea1eac0..b4d5a9deb17f 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1919,7 +1919,7 @@ static ssize_t run_store(struct kobject *kobj, struct kobj_attribute *attr,
if (ksm_run != flags) {
ksm_run = flags;
if (flags & KSM_RUN_UNMERGE) {
- int oom_score_adj;
+ short oom_score_adj;
oom_score_adj = test_set_oom_score_adj(OOM_SCORE_ADJ_MAX);
err = unmerge_and_remove_all_rmap_items();
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 7e9e9113bd05..37ab4c5ab6e8 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -53,7 +53,7 @@ static DEFINE_SPINLOCK(zone_scan_lock);
* @old_val. Usually used to reinstate a previous value to prevent racing with
* userspacing tuning the value in the interim.
*/
-void compare_swap_oom_score_adj(int old_val, int new_val)
+void compare_swap_oom_score_adj(short old_val, short new_val)
{
struct sighand_struct *sighand = current->sighand;
@@ -72,7 +72,7 @@ void compare_swap_oom_score_adj(int old_val, int new_val)
* synchronization and returns the old value. Usually used to temporarily
* set a value, save the old value in the caller, and then reinstate it later.
*/
-int test_set_oom_score_adj(int new_val)
+short test_set_oom_score_adj(short new_val)
{
struct sighand_struct *sighand = current->sighand;
int old_val;
@@ -193,7 +193,7 @@ unsigned long oom_badness(struct task_struct *p, struct mem_cgroup *memcg,
if (!p)
return 0;
- adj = p->signal->oom_score_adj;
+ adj = (long)p->signal->oom_score_adj;
if (adj == OOM_SCORE_ADJ_MIN) {
task_unlock(p);
return 0;
@@ -399,7 +399,7 @@ static void dump_tasks(const struct mem_cgroup *memcg, const nodemask_t *nodemas
continue;
}
- pr_info("[%5d] %5d %5d %8lu %8lu %7lu %8lu %5d %s\n",
+ pr_info("[%5d] %5d %5d %8lu %8lu %7lu %8lu %5hd %s\n",
task->pid, from_kuid(&init_user_ns, task_uid(task)),
task->tgid, task->mm->total_vm, get_mm_rss(task->mm),
task->mm->nr_ptes,
@@ -415,7 +415,7 @@ static void dump_header(struct task_struct *p, gfp_t gfp_mask, int order,
{
task_lock(current);
pr_warning("%s invoked oom-killer: gfp_mask=0x%x, order=%d, "
- "oom_score_adj=%d\n",
+ "oom_score_adj=%hd\n",
current->comm, gfp_mask, order,
current->signal->oom_score_adj);
cpuset_print_task_mems_allowed(current);
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 0fbb45283c66..bb6f6a04e92d 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1498,7 +1498,7 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
struct address_space *mapping;
struct inode *inode;
struct filename *pathname;
- int oom_score_adj;
+ short oom_score_adj;
int i, type, prev;
int err;