On Tue, Jun 17, 2014 at 11:53 PM, Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote: > Il 17/06/2014 17:50, Ming Lei ha scritto: > >>> > It would be nice to allocate virtqueues dynamically instead of >>> > hardcoding the limit. virtio-scsi also allocates virtqueues >>> > dynamically. >> >> virtio-scsi may have lots of LUN, but virtio-blk only has one disk >> which needn't lots of hardware queues. > > > If you want to do queue steering based on the guest VCPU number, the number > of queues must be = to the number of VCPUs shouldn't it? > > I tried using a divisor of the number of VCPUs, but couldn't get the block > layer to deliver interrupts to the right VCPU. For blk-mq's hardware queue, that won't be necessary to equal to VCPUs number, and irq affinity per hw queue can be simply set as blk_mq_hw_ctx->cpumask. Thanks, -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
