Re: [Xen-devel] [Problem] about src/xen/include/public/io/ring.h

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2013-04-12 at 03:21 +0100, éç wrote:


> On Thu, Apr 11, 2013 at 9:20 PM, Konrad Rzeszutek Wilk
> <konrad.wilk@xxxxxxxxxx> wrote:

>         Please don't top post.

éç, Can you also stop posting HTML mails, thanks.

> Then rsp = RING_SIZE(r) - (X - Y),  I can't figure out this and the
> return value ` req < rsp ? req : rsp` ?

Perhaps think about the case when the ring becomes full of either
responses or requests and what that means in terms of "wrapping" in the
ring.

Ian.


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