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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.h | |
| 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.h')
| -rw-r--r-- | block/blk-mq.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-mq.h b/block/blk-mq.h index 6a8f8b60d8ba..1821f448f7c4 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -17,7 +17,7 @@ struct blk_mq_ctx { } ____cacheline_aligned_in_smp; unsigned int cpu; - unsigned int index_hw; + unsigned short index_hw[HCTX_MAX_TYPES]; /* incremented at dispatch time */ unsigned long rq_dispatched[2]; |