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authorAdam Manzanares <adam.manzanares@wdc.com>2017-04-04 08:25:14 -0700
committerJens Axboe <axboe@fb.com>2017-04-04 15:39:47 -0600
commit85003a446e9d058c9c3e6cfa5d991ace07330a68 (patch)
tree20876852bee69d1c3835d04dcf3551e7b7d42601 /block/cfq-iosched.c
parent77f02a7acd7654cd5944f2120831d1eace94b343 (diff)
downloadlinux-0-day-85003a446e9d058c9c3e6cfa5d991ace07330a68.tar.gz
block: fix inheriting request priority from bio
In 4.10 I introduced a patch that associates the ioc priority with each request in the block layer. This work was done in the single queue block layer code. This patch unifies ioc priority to request mapping across the single/multi queue block layers. I have tested this patch with the null block device driver with the following parameters. null_blk queue_mode=2 irqmode=0 use_per_node_hctx=1 nr_devices=1 I have not seen a performance regression with this patch and I would appreciate any feedback or additional testing. I have also verified that io priorities are passed to the device when using the SQ and MQ path to a SATA HDD that supports io priorities. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Adam Manzanares <adam.manzanares@wdc.com> Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Jens Axboe <axboe@fb.com>
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