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| author | Jianchao Wang <jianchao.w.wang@oracle.com> | 2019-01-24 18:25:32 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-02-01 08:33:04 -0700 |
| commit | 8ccdf4a3775229314c8bd365ac88c2cbdf36be13 (patch) | |
| tree | 8b6c6835912bb3f3076d6694ba264072ae5921b6 /block/blk-mq.c | |
| parent | 058fdecc6de7cdecbf4c59b851e80eb2d6c5295f (diff) | |
| download | lwn-8ccdf4a3775229314c8bd365ac88c2cbdf36be13.tar.gz lwn-8ccdf4a3775229314c8bd365ac88c2cbdf36be13.zip | |
blk-mq: save queue mapping result into ctx directly
Currently, the queue mapping result is saved in a two-dimensional
array. In the hot path, to get a hctx, we need do following:
q->queue_hw_ctx[q->tag_set->map[type].mq_map[cpu]]
This isn't very efficient. We could save the queue mapping result into
ctx directly with different hctx type, like,
ctx->hctxs[type]
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 | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 8f5b533764ca..445d0a2642ae 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -364,7 +364,7 @@ static struct request *blk_mq_get_request(struct request_queue *q, } if (likely(!data->hctx)) data->hctx = blk_mq_map_queue(q, data->cmd_flags, - data->ctx->cpu); + data->ctx); if (data->cmd_flags & REQ_NOWAIT) data->flags |= BLK_MQ_REQ_NOWAIT; @@ -2435,7 +2435,7 @@ static void blk_mq_map_swqueue(struct request_queue *q) continue; hctx = blk_mq_map_queue_type(q, j, i); - + ctx->hctxs[j] = hctx; /* * If the CPU is already set in the mask, then we've * mapped this one already. This can happen if |