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authorShaohua Li <shli@fb.com>2017-03-27 20:51:38 +0300
committerJens Axboe <axboe@fb.com>2017-03-28 17:02:20 +0300
commitd61fcfa4bb18992dc8e171996808e1034dc643bb (patch)
treeb604e697ded4fdb51b750b35bfbe76436d2c34f6 /block/blk.h
parent297e3d854784821d3b8ff3ae117f20d71f125504 (diff)
downloadlinux-d61fcfa4bb18992dc8e171996808e1034dc643bb.tar.xz
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 <shli@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk.h')
-rw-r--r--block/blk.h2
1 files changed, 2 insertions, 0 deletions
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);