linux-kernel - Re: [PATCH 0/5] Multiqueue virtio-scsi

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Message-ID: <503F8A8F.3090709@redhat.com>
Date:	Thu, 30 Aug 2012 17:45:19 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
CC:	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH 0/5] Multiqueue virtio-scsi

Il 30/08/2012 16:53, Michael S. Tsirkin ha scritto:
>> > this series adds multiqueue support to the virtio-scsi driver, based
>> > on Jason Wang's work on virtio-net.  It uses a simple queue steering
>> > algorithm that expects one queue per CPU.  LUNs in the same target always
>> > use the same queue (so that commands are not reordered); queue switching
>> > occurs when the request being queued is the only one for the target.
>> > Also based on Jason's patches, the virtqueue affinity is set so that
>> > each CPU is associated to one virtqueue.
> 
> Is there a spec patch? I did not see one.

It was already in the first version of the spec, just not implemented
until now.

Paolo
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