dlan17/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mm, oom: change type of oom_score_adj to short

Browse Source 
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>
This commit is contained in:
David Rientjes
2012-12-11 17:22:27 -08:00
committed by Linus Torvalds
parent fa26437517
commit a9c58b907d
9 changed files with 31 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/linux/oom.h
+2 -2
View File
@@ -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,
include/linux/sched.h
+3 -3
View File
@@ -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
include/trace/events/oom.h
+2 -2
View File
@@ -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)
);
include/trace/events/task.h
+4 -4
View File
@@ -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)
);