On 04/04/2017 09:25 AM, adam.manzanares@xxxxxxx wrote: > From: Adam Manzanares <adam.manzanares@xxxxxxx> > > 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. Applied, with an updated subject line, it didn't really describe what the patch does. Thanks. -- Jens Axboe
