From: John Fastabend <john.fastabend@gmail.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: kubakici@wp.pl, jasowang@redhat.com, ast@fb.com,
john.r.fastabend@intel.com, netdev@vger.kernel.org
Subject: Re: [net-next PATCH v2 0/5] XDP adjust head support for virtio
Date: Wed, 8 Feb 2017 08:39:13 -0800 [thread overview]
Message-ID: <589B49B1.4070304@gmail.com> (raw)
In-Reply-To: <20170207053455-mutt-send-email-mst@kernel.org>
[...]
> However, I came up with a new idea for the future and I'd like to show
> where I'm going. The idea is that we don't use s/g buffers on RX, so we
> have a pointer per descriptor untapped. So we can allow users to stick
> their own pointer in there, if they promise not to use s/g on this vq.
> With a full extra pointer to play with, we can go wild.
I looked at this quickly it seems like it would work and allow us to avoid
the reset. However, it seems like a lot of churn to avoid a single reset.
I don't see the reset itself as being that bad of an operation. I agree the
reset is not ideal though.
Are there any other use cases for this other than XDP?
>
> Take a look but it doesn't even build yet.
> Need to roll it out to all devices etc.
>
> --->
>
[...]
next prev parent reply other threads:[~2017-02-08 16:41 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-03 3:14 [net-next PATCH v2 0/5] XDP adjust head support for virtio John Fastabend
2017-02-03 3:14 ` [net-next PATCH v2 1/5] virtio_net: wrap rtnl_lock in test for calling with lock already held John Fastabend
2017-02-06 6:48 ` Jason Wang
2017-02-03 3:15 ` [net-next PATCH v2 2/5] virtio_net: factor out xdp handler for readability John Fastabend
2017-02-06 6:49 ` Jason Wang
2017-02-03 3:15 ` [net-next PATCH v2 3/5] virtio_net: remove duplicate queue pair binding in XDP John Fastabend
2017-02-06 7:06 ` Jason Wang
2017-02-03 3:16 ` [net-next PATCH v2 4/5] virtio_net: refactor freeze/restore logic into virtnet reset logic John Fastabend
2017-02-06 7:07 ` Jason Wang
2017-02-03 3:16 ` [net-next PATCH v2 5/5] virtio_net: XDP support for adjust_head John Fastabend
2017-02-03 4:04 ` Michael S. Tsirkin
2017-02-06 7:08 ` Jason Wang
2017-02-06 19:29 ` John Fastabend
2017-02-07 2:23 ` Jason Wang
2017-02-03 3:29 ` [net-next PATCH v2 0/5] XDP adjust head support for virtio Alexei Starovoitov
2017-02-03 3:55 ` Jakub Kicinski
2017-02-05 22:36 ` David Miller
2017-02-06 4:39 ` Michael S. Tsirkin
2017-02-06 7:12 ` Jason Wang
2017-02-06 16:37 ` David Miller
2017-02-07 4:15 ` Michael S. Tsirkin
2017-02-07 15:05 ` David Miller
2017-02-08 16:39 ` John Fastabend [this message]
2017-02-08 16:50 ` Michael S. Tsirkin
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