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Re: [Xen-devel] RING_HAS_UNCONSUMED_REQUESTS oddness

To: Zoltan Kiss <zoltan.kiss@xxxxxxxxxx>
From: Ian Campbell <ian.campbell@xxxxxxxxxx>
Date: Thu, 6 Mar 2014 15:53:41 +0000
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>
Delivery-date: Thu, 06 Mar 2014 15:54:10 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

On Thu, 2014-03-06 at 15:47 +0000, Zoltan Kiss wrote:
> By my understanding, there is no way rsp could be smaller than req, so
> there is no point having this. Am I missing something?

It happens during wraparound, i.e. after req has wrapped but rsp hasn't
yet.

Ian.



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