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| author | Weiping Zhang <zhangweiping@didiglobal.com> | 2020-06-17 08:18:37 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-06-18 05:33:04 +0200 |
| commit | fe35ec58f0d339221643287bbb7cee15c93a5389 (patch) | |
| tree | 57b317c47c08da4ddcc8e178e3ac7a5567f3f8b6 /block/blk-exec.c | |
| parent | blktrace: Avoid sparse warnings when assigning q->blk_trace (diff) | |
| download | linux-fe35ec58f0d339221643287bbb7cee15c93a5389.tar.xz linux-fe35ec58f0d339221643287bbb7cee15c93a5389.zip | |
block: update hctx map when use multiple maps
There is an issue when tune the number for read and write queues,
if the total queue count was not changed. The hctx->type cannot
be updated, since __blk_mq_update_nr_hw_queues will return directly
if the total queue count has not been changed.
Reproduce:
dmesg | grep "default/read/poll"
[ 2.607459] nvme nvme0: 48/0/0 default/read/poll queues
cat /sys/kernel/debug/block/nvme0n1/hctx*/type | sort | uniq -c
48 default
tune the write queues to 24:
echo 24 > /sys/module/nvme/parameters/write_queues
echo 1 > /sys/block/nvme0n1/device/reset_controller
dmesg | grep "default/read/poll"
[ 433.547235] nvme nvme0: 24/24/0 default/read/poll queues
cat /sys/kernel/debug/block/nvme0n1/hctx*/type | sort | uniq -c
48 default
The driver's hardware queue mapping is not same as block layer.
Signed-off-by: Weiping Zhang <zhangweiping@didiglobal.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-exec.c')
0 files changed, 0 insertions, 0 deletions