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| author | Jens Axboe <axboe@kernel.dk> | 2018-10-29 22:13:29 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-11-07 23:44:59 +0300 |
| commit | f31967f0e455d08d3ea1d2f849bf62dafc92dbf4 (patch) | |
| tree | 22fbc79b5ba286e2add8f995a8cfa9f211200192 /block/blk-mq-sched.c | |
| parent | f9afca4d367b8c915f28d29fcaba7460640403ff (diff) | |
| download | linux-f31967f0e455d08d3ea1d2f849bf62dafc92dbf4.tar.xz | |
blk-mq: allow software queue to map to multiple hardware queues
The mapping used to be dependent on just the CPU location, but
now it's a tuple of (type, cpu) instead. This is a prep patch
for allowing a single software queue to map to multiple hardware
queues. No functional changes in this patch.
This changes the software queue count to an unsigned short
to save a bit of space. We can still support 64K-1 CPUs,
which should be enough. Add a check to catch a wrap.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq-sched.c')
| -rw-r--r-- | block/blk-mq-sched.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c index 68087bf71a61..bbabc3877d5a 100644 --- a/block/blk-mq-sched.c +++ b/block/blk-mq-sched.c @@ -109,7 +109,7 @@ static void blk_mq_do_dispatch_sched(struct blk_mq_hw_ctx *hctx) static struct blk_mq_ctx *blk_mq_next_ctx(struct blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx) { - unsigned idx = ctx->index_hw; + unsigned short idx = ctx->index_hw[hctx->type]; if (++idx == hctx->nr_ctx) idx = 0; |