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| author | Jens Axboe <jens.axboe@oracle.com> | 2008-08-26 10:25:02 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-10-09 08:56:09 +0200 |
| commit | ab780f1ece0dc8d5e8e8e85435acc5e4747ccda3 (patch) | |
| tree | 4085b6c929a44de229eb5ef13fa2079211ea5512 /block/blk-core.c | |
| parent | block: add support for IO CPU affinity (diff) | |
| download | linux-ab780f1ece0dc8d5e8e8e85435acc5e4747ccda3.tar.xz linux-ab780f1ece0dc8d5e8e8e85435acc5e4747ccda3.zip | |
block: inherit CPU completion on bio->rq and rq->rq merges
Somewhat incomplete, as we do allow merges of requests and bios
that have different completion CPUs given. This is done on the
assumption that a larger IO is still more beneficial than CPU
locality.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-core.c')
| -rw-r--r-- | block/blk-core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 5484838f46e7..b9a252cae4df 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1134,6 +1134,8 @@ static int __make_request(struct request_queue *q, struct bio *bio) req->biotail = bio; req->nr_sectors = req->hard_nr_sectors += nr_sectors; req->ioprio = ioprio_best(req->ioprio, prio); + if (!blk_rq_cpu_valid(req)) + req->cpu = bio->bi_comp_cpu; drive_stat_acct(req, 0); if (!attempt_back_merge(q, req)) elv_merged_request(q, req, el_ret); @@ -1161,6 +1163,8 @@ static int __make_request(struct request_queue *q, struct bio *bio) req->sector = req->hard_sector = bio->bi_sector; req->nr_sectors = req->hard_nr_sectors += nr_sectors; req->ioprio = ioprio_best(req->ioprio, prio); + if (!blk_rq_cpu_valid(req)) + req->cpu = bio->bi_comp_cpu; drive_stat_acct(req, 0); if (!attempt_front_merge(q, req)) elv_merged_request(q, req, el_ret); |