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From: David Gibson <david@gibson.dropbear.id.au>
To: Eugenio Perez Martin <eperezma@redhat.com>
Cc: passt-dev@passt.top, jasowang@redhat.com
Subject: Re: [RFC v2 04/11] tcp: export memory regions to vhost
Date: Tue, 29 Jul 2025 10:25:01 +1000	[thread overview]
Message-ID: <aIgU3eM_H04UJ8Py@zatzit> (raw)
In-Reply-To: <CAJaqyWeD6-rgAkJe-+3WecLigjnaQ8H8KemG1LGXOy5YASA==g@mail.gmail.com>

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On Mon, Jul 28, 2025 at 06:41:20PM +0200, Eugenio Perez Martin wrote:
> On Wed, Jul 23, 2025 at 9:06 AM David Gibson
> <david@gibson.dropbear.id.au> wrote:
> >
> > On Wed, Jul 09, 2025 at 07:47:41PM +0200, Eugenio Pérez wrote:
> > > So vhost kernel is able to access the TCP buffers.
> > >
> > > Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
> > > ---
> > >  tap.c     | 14 +++++++++++---
> > >  tcp_buf.c | 14 ++++----------
> > >  tcp_buf.h | 19 +++++++++++++++++++
> > >  3 files changed, 34 insertions(+), 13 deletions(-)
> > >
> > > diff --git a/tap.c b/tap.c
> > > index 0656294..8b3ec45 100644
> > > --- a/tap.c
> > > +++ b/tap.c
> > > @@ -63,6 +63,8 @@
> > >  #include "vhost_user.h"
> > >  #include "vu_common.h"
> > >
> > > +#include "tcp_buf.h"
> > > +
> >
> > I don't love including the pretty specific content of tcp_buf.h into
> > the mostly protocol unaware tap.c.  Though I do realise that avoiding
> > it will probably have other tradeoffs.
> 
> I was more focused on testing the performance of the solution than
> making it pretty, but I'm a big fan of hiding the buffers somehow :).
> I just didn't explore the options.

Ok, that's fine for now then.

-- 
David Gibson (he or they)	| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you, not the other way
				| around.
http://www.ozlabs.org/~dgibson

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  reply	other threads:[~2025-07-29  0:32 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-07-09 17:47 [RFC v2 00/11] Add vhost-net kernel support Eugenio Pérez
2025-07-09 17:47 ` [RFC v2 01/11] tap: implement vhost_call_cb Eugenio Pérez
2025-07-23  6:56   ` David Gibson
2025-07-28 16:33     ` Eugenio Perez Martin
2025-07-29  0:11       ` David Gibson
2025-07-09 17:47 ` [RFC v2 02/11] tap: add die() on vhost error Eugenio Pérez
2025-07-23  6:58   ` David Gibson
2025-07-09 17:47 ` [RFC v2 03/11] tap: replace tx tap hdr with virtio_nethdr_mrg_rxbuf Eugenio Pérez
2025-07-24  0:17   ` David Gibson
2025-07-28 16:37     ` Eugenio Perez Martin
2025-07-09 17:47 ` [RFC v2 04/11] tcp: export memory regions to vhost Eugenio Pérez
2025-07-23  7:06   ` David Gibson
2025-07-28 16:41     ` Eugenio Perez Martin
2025-07-29  0:25       ` David Gibson [this message]
2025-07-09 17:47 ` [RFC v2 05/11] virtio: Fill .next in tx queue Eugenio Pérez
2025-07-23  7:07   ` David Gibson
2025-07-28 16:44     ` Eugenio Perez Martin
2025-07-09 17:47 ` [RFC v2 06/11] tap: move static iov_sock to tcp_buf_data_from_sock Eugenio Pérez
2025-07-23  7:09   ` David Gibson
2025-07-28 16:43     ` Eugenio Perez Martin
2025-07-29  0:28       ` David Gibson
2025-07-09 17:47 ` [RFC v2 07/11] tap: support tx through vhost Eugenio Pérez
2025-07-24  0:24   ` David Gibson
2025-07-24 14:30     ` Stefano Brivio
2025-07-25  0:23       ` David Gibson
2025-07-09 17:47 ` [RFC v2 08/11] tap: add tap_free_old_xmit Eugenio Pérez
2025-07-24  0:32   ` David Gibson
2025-07-28 16:45     ` Eugenio Perez Martin
2025-07-09 17:47 ` [RFC v2 09/11] tcp: start conversion to circular buffer Eugenio Pérez
2025-07-24  1:03   ` David Gibson
2025-07-28 16:55     ` Eugenio Perez Martin
2025-07-29  0:30       ` David Gibson
2025-07-09 17:47 ` [RFC v2 10/11] tap: add poll(2) to used_idx Eugenio Pérez
2025-07-24  1:20   ` David Gibson
2025-07-28 17:03     ` Eugenio Perez Martin
2025-07-29  0:32       ` David Gibson
2025-07-29  7:04         ` Eugenio Perez Martin
2025-07-30  0:32           ` David Gibson
2025-07-09 17:47 ` [RFC v2 11/11] tcp_buf: adding TCP tx circular buffer Eugenio Pérez
2025-07-24  1:33   ` David Gibson
2025-07-28 17:04     ` Eugenio Perez Martin
2025-07-10  9:46 ` [RFC v2 00/11] Add vhost-net kernel support Eugenio Perez Martin

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