From d61fcfa4bb18992dc8e171996808e1034dc643bb Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Mon, 27 Mar 2017 10:51:38 -0700 Subject: blk-throttle: choose a small throtl_slice for SSD The throtl_slice is 100ms by default. This is a long time for SSD, a lot of IO can run. To make cgroups have smoother throughput, we choose a small value (20ms) for SSD. Signed-off-by: Shaohua Li Signed-off-by: Jens Axboe --- block/blk.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'block/blk.h') diff --git a/block/blk.h b/block/blk.h index bcd3de6c1081..13070c325858 100644 --- a/block/blk.h +++ b/block/blk.h @@ -319,10 +319,12 @@ static inline struct io_context *create_io_context(gfp_t gfp_mask, int node) extern void blk_throtl_drain(struct request_queue *q); extern int blk_throtl_init(struct request_queue *q); extern void blk_throtl_exit(struct request_queue *q); +extern void blk_throtl_register_queue(struct request_queue *q); #else /* CONFIG_BLK_DEV_THROTTLING */ static inline void blk_throtl_drain(struct request_queue *q) { } static inline int blk_throtl_init(struct request_queue *q) { return 0; } static inline void blk_throtl_exit(struct request_queue *q) { } +static inline void blk_throtl_register_queue(struct request_queue *q) { } #endif /* CONFIG_BLK_DEV_THROTTLING */ #ifdef CONFIG_BLK_DEV_THROTTLING_LOW extern ssize_t blk_throtl_sample_time_show(struct request_queue *q, char *page); -- cgit v1.2.3