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Re: [PATCH v1 2/3] io: Add zerocopy and errqueue
From: |
Leonardo Bras Soares Passos |
Subject: |
Re: [PATCH v1 2/3] io: Add zerocopy and errqueue |
Date: |
Wed, 8 Sep 2021 17:25:50 -0300 |
On Tue, Sep 7, 2021 at 8:06 AM Dr. David Alan Gilbert
<dgilbert@redhat.com> wrote:
> > Possibly, yes. This really need David G's input since he understands
> > the code in way more detail than me.
>
> Hmm I'm not entirely sure why we have the sync after each iteration;
> the case I can think of is if we're doing async sending, we could have
> two versions of the same page in flight (one from each iteration) -
> you'd want those to get there in the right order.
>
> Dave
Well, that's the thing: as we don't copy the buffer in MSG_ZEROCOPY, we will in
fact have the same page in flight twice, instead of two versions,
given the buffer is
sent as it is during transmission.
For me it looks like there will be no change in the current algorithm,
but I am still
a beginner in migration code, and I am probably missing something.
Best regards,
Leo
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, (continued)
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Daniel P . Berrangé, 2021/09/02
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Leonardo Bras Soares Passos, 2021/09/02
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Daniel P . Berrangé, 2021/09/02
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Leonardo Bras Soares Passos, 2021/09/02
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Daniel P . Berrangé, 2021/09/02
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Dr. David Alan Gilbert, 2021/09/07
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Peter Xu, 2021/09/07
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Dr. David Alan Gilbert, 2021/09/08
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Peter Xu, 2021/09/08
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Dr. David Alan Gilbert, 2021/09/09
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue,
Leonardo Bras Soares Passos <=
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Peter Xu, 2021/09/08
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Daniel P . Berrangé, 2021/09/08
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Peter Xu, 2021/09/08
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Leonardo Bras Soares Passos, 2021/09/09
- Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Peter Xu, 2021/09/09
Re: [PATCH v1 2/3] io: Add zerocopy and errqueue, Leonardo Bras Soares Passos, 2021/09/02