diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-mq.c | 4 | ||||
| -rw-r--r-- | block/blk.h | 6 |
2 files changed, 8 insertions, 2 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 652a31fc3bb3..49587c181e3f 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2148,14 +2148,14 @@ static void blk_add_rq_to_plug(struct blk_plug *plug, struct request *rq) } /* - * Allow 4x BLK_MAX_REQUEST_COUNT requests on plug queue for multiple + * Allow 2x BLK_MAX_REQUEST_COUNT requests on plug queue for multiple * queues. This is important for md arrays to benefit from merging * requests. */ static inline unsigned short blk_plug_max_rq_count(struct blk_plug *plug) { if (plug->multiple_queues) - return BLK_MAX_REQUEST_COUNT * 4; + return BLK_MAX_REQUEST_COUNT * 2; return BLK_MAX_REQUEST_COUNT; } diff --git a/block/blk.h b/block/blk.h index 6c3c00a8fe19..aab72194d226 100644 --- a/block/blk.h +++ b/block/blk.h @@ -185,6 +185,12 @@ void blk_account_io_start(struct request *req); void blk_account_io_done(struct request *req, u64 now); /* + * Plug flush limits + */ +#define BLK_MAX_REQUEST_COUNT 32 +#define BLK_PLUG_FLUSH_SIZE (128 * 1024) + +/* * Internal elevator interface */ #define ELV_ON_HASH(rq) ((rq)->rq_flags & RQF_HASHED) |