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| author | Jianchao Wang <jianchao.w.wang@oracle.com> | 2019-01-24 18:25:33 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-02-01 08:33:43 -0700 |
| commit | bb94aea1444b9859faa8d72aff3713fcd11c6696 (patch) | |
| tree | 0ac5fc4f031d07a8368dff0b773f7d10f83fa80a /block/blk-mq.c | |
| parent | 8ccdf4a3775229314c8bd365ac88c2cbdf36be13 (diff) | |
| download | lwn-bb94aea1444b9859faa8d72aff3713fcd11c6696.tar.gz lwn-bb94aea1444b9859faa8d72aff3713fcd11c6696.zip | |
blk-mq: save default hctx into ctx->hctxs for not-supported type
Currently, we check whether the hctx type is supported every time
in hot path. Actually, this is not necessary, we could save the
default hctx into ctx->hctxs if the type is not supported when
map swqueues and use it directly with ctx->hctxs[type].
We also needn't check whether the poll is enabled or not, because
the caller would clear the REQ_HIPRI in that case.
Signed-off-by: Jianchao Wang <jianchao.w.wang@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 445d0a2642ae..8a825aebc6b5 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2431,8 +2431,11 @@ static void blk_mq_map_swqueue(struct request_queue *q) ctx = per_cpu_ptr(q->queue_ctx, i); for (j = 0; j < set->nr_maps; j++) { - if (!set->map[j].nr_queues) + if (!set->map[j].nr_queues) { + ctx->hctxs[j] = blk_mq_map_queue_type(q, + HCTX_TYPE_DEFAULT, i); continue; + } hctx = blk_mq_map_queue_type(q, j, i); ctx->hctxs[j] = hctx; @@ -2455,6 +2458,10 @@ static void blk_mq_map_swqueue(struct request_queue *q) */ BUG_ON(!hctx->nr_ctx); } + + for (; j < HCTX_MAX_TYPES; j++) + ctx->hctxs[j] = blk_mq_map_queue_type(q, + HCTX_TYPE_DEFAULT, i); } mutex_unlock(&q->sysfs_lock); |