Subject: Re: [net-next RFC V5 3/5] virtio: intorduce an API to set affinity for a virtqueue

From: Avi Kivity <[email-masked]>
Date: Thu, 09 Aug 2012 18:35:45 +0300

On 08/09/2012 06:13 PM, Paolo Bonzini wrote:
> Il 05/07/2012 12:29, Jason Wang ha scritto:
>> Sometimes, virtio device need to configure irq affiniry hint to maximize the
>> performance. Instead of just exposing the irq of a virtqueue, this patch
>> introduce an API to set the affinity for a virtqueue.
>> 
>> The api is best-effort, the affinity hint may not be set as expected due to
>> platform support, irq sharing or irq type. Currently, only pci method were
>> implemented and we set the affinity according to:
>> 
>> - if device uses INTX, we just ignore the request
>> - if device has per vq vector, we force the affinity hint
>> - if the virtqueues share MSI, make the affinity OR over all affinities
>>  requested
>> 
>> Signed-off-by: Jason Wang <[email-masked]>
> 
> It looks like both I and Jason will need these patches during the 3.7
> merge window, and from different trees (net-next vs. scsi).  How do we
> synchronize?

Get one of them to promise not to rebase, merge it, and base your
patches on top of the merge.

-- 
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