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| author | Omar Sandoval <osandov@fb.com> | 2018-05-09 02:08:50 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-05-09 08:33:05 -0600 |
| commit | 544ccc8dc904db55d4576c27a1eb66a888ffacea (patch) | |
| tree | 5fa92e3cf1a5d33eddc61dfd65d088dd5cdb6f84 /block/blk-core.c | |
| parent | 5238dcf4136fd7287be8e7d38752645bfa5782ec (diff) | |
| download | linux-0-day-544ccc8dc904db55d4576c27a1eb66a888ffacea.tar.gz linux-0-day-544ccc8dc904db55d4576c27a1eb66a888ffacea.tar.xz | |
block: get rid of struct blk_issue_stat
struct blk_issue_stat squashes three things into one u64:
- The time the driver started working on a request
- The original size of the request (for the io.low controller)
- Flags for writeback throttling
It turns out that on x86_64, we have a 4 byte hole in struct request
which we can fill with the non-timestamp fields from blk_issue_stat,
simplifying things quite a bit.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-core.c')
| -rw-r--r-- | block/blk-core.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index fe2f457ed27d7..33d5c7d85da10 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -2991,7 +2991,10 @@ void blk_start_request(struct request *req) blk_dequeue_request(req); if (test_bit(QUEUE_FLAG_STATS, &req->q->queue_flags)) { - blk_stat_set_issue(&req->issue_stat, blk_rq_sectors(req)); + req->io_start_time_ns = ktime_get_ns(); +#ifdef CONFIG_BLK_DEV_THROTTLING_LOW + req->throtl_size = blk_rq_sectors(req); +#endif req->rq_flags |= RQF_STATS; wbt_issue(req->q->rq_wb, req); } |