aboutsummaryrefslogtreecommitdiffstats
path: root/include
diff options
context:
space:
mode:
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 /include
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 'include')
-rw-r--r--include/linux/oom.h4
-rw-r--r--include/linux/sched.h6
-rw-r--r--include/trace/events/oom.h4
-rw-r--r--include/trace/events/task.h8
4 files changed, 11 insertions, 11 deletions
diff --git a/include/linux/oom.h b/include/linux/oom.h
index 4a4188da457..922dab164eb 100644
--- a/include/linux/oom.h
+++ b/include/linux/oom.h
@@ -29,8 +29,8 @@ enum oom_scan_t {
OOM_SCAN_SELECT, /* always select this thread first */
};
-extern void compare_swap_oom_score_adj(int old_val, int new_val);
-extern int test_set_oom_score_adj(int new_val);
+extern void compare_swap_oom_score_adj(short old_val, short new_val);
+extern short test_set_oom_score_adj(short new_val);
extern unsigned long oom_badness(struct task_struct *p,
struct mem_cgroup *memcg, const nodemask_t *nodemask,
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 0dd42a02df2..ed30456152d 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -631,9 +631,9 @@ struct signal_struct {
struct rw_semaphore group_rwsem;
#endif
- int oom_score_adj; /* OOM kill score adjustment */
- int oom_score_adj_min; /* OOM kill score adjustment minimum value.
- * Only settable by CAP_SYS_RESOURCE. */
+ short oom_score_adj; /* OOM kill score adjustment */
+ short oom_score_adj_min; /* OOM kill score adjustment min value.
+ * Only settable by CAP_SYS_RESOURCE. */
struct mutex cred_guard_mutex; /* guard against foreign influences on
* credential calculations
diff --git a/include/trace/events/oom.h b/include/trace/events/oom.h
index dd4ba3b9200..1e974983757 100644
--- a/include/trace/events/oom.h
+++ b/include/trace/events/oom.h
@@ -14,7 +14,7 @@ TRACE_EVENT(oom_score_adj_update,
TP_STRUCT__entry(
__field( pid_t, pid)
__array( char, comm, TASK_COMM_LEN )
- __field( int, oom_score_adj)
+ __field( short, oom_score_adj)
),
TP_fast_assign(
@@ -23,7 +23,7 @@ TRACE_EVENT(oom_score_adj_update,
__entry->oom_score_adj = task->signal->oom_score_adj;
),
- TP_printk("pid=%d comm=%s oom_score_adj=%d",
+ TP_printk("pid=%d comm=%s oom_score_adj=%hd",
__entry->pid, __entry->comm, __entry->oom_score_adj)
);
diff --git a/include/trace/events/task.h b/include/trace/events/task.h
index b53add02e92..102a646e199 100644
--- a/include/trace/events/task.h
+++ b/include/trace/events/task.h
@@ -15,7 +15,7 @@ TRACE_EVENT(task_newtask,
__field( pid_t, pid)
__array( char, comm, TASK_COMM_LEN)
__field( unsigned long, clone_flags)
- __field( int, oom_score_adj)
+ __field( short, oom_score_adj)
),
TP_fast_assign(
@@ -25,7 +25,7 @@ TRACE_EVENT(task_newtask,
__entry->oom_score_adj = task->signal->oom_score_adj;
),
- TP_printk("pid=%d comm=%s clone_flags=%lx oom_score_adj=%d",
+ TP_printk("pid=%d comm=%s clone_flags=%lx oom_score_adj=%hd",
__entry->pid, __entry->comm,
__entry->clone_flags, __entry->oom_score_adj)
);
@@ -40,7 +40,7 @@ TRACE_EVENT(task_rename,
__field( pid_t, pid)
__array( char, oldcomm, TASK_COMM_LEN)
__array( char, newcomm, TASK_COMM_LEN)
- __field( int, oom_score_adj)
+ __field( short, oom_score_adj)
),
TP_fast_assign(
@@ -50,7 +50,7 @@ TRACE_EVENT(task_rename,
__entry->oom_score_adj = task->signal->oom_score_adj;
),
- TP_printk("pid=%d oldcomm=%s newcomm=%s oom_score_adj=%d",
+ TP_printk("pid=%d oldcomm=%s newcomm=%s oom_score_adj=%hd",
__entry->pid, __entry->oldcomm,
__entry->newcomm, __entry->oom_score_adj)
);