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| author | Jens Axboe <axboe@fb.com> | 2014-04-15 14:02:24 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-04-15 14:02:24 -0600 |
| commit | f89e0dd9d1a72fdf6b8958bcadfa6abf84f3cae0 (patch) | |
| tree | 6d4ca8c67dc22d1c81053392078588f9ab3804b5 /include/linux/vmstat.h | |
| parent | 21f9fcd81593e201172160853b8647336fb81f4f (diff) | |
| parent | c9eaa447e77efe77b7fa4c953bd62de8297fd6c5 (diff) | |
Merge tag 'v3.15-rc1' into for-3.16/core
We don't like this, but things have diverged with the blk-mq fixes
in 3.15-rc1. So merge it in.
Diffstat (limited to 'include/linux/vmstat.h')
| -rw-r--r-- | include/linux/vmstat.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h index ea4476157e00..45c9cd1daf7a 100644 --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -27,9 +27,13 @@ struct vm_event_state { DECLARE_PER_CPU(struct vm_event_state, vm_event_states); +/* + * vm counters are allowed to be racy. Use raw_cpu_ops to avoid the + * local_irq_disable overhead. + */ static inline void __count_vm_event(enum vm_event_item item) { - __this_cpu_inc(vm_event_states.event[item]); + raw_cpu_inc(vm_event_states.event[item]); } static inline void count_vm_event(enum vm_event_item item) @@ -39,7 +43,7 @@ static inline void count_vm_event(enum vm_event_item item) static inline void __count_vm_events(enum vm_event_item item, long delta) { - __this_cpu_add(vm_event_states.event[item], delta); + raw_cpu_add(vm_event_states.event[item], delta); } static inline void count_vm_events(enum vm_event_item item, long delta) |