From: Rusty Russell <rusty@rustcorp.com.au>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Max Krasnyansky <maxk@qualcomm.com>,
netdev@vger.kernel.org,
virtualization@lists.linux-foundation.org, markmc@redhat.com
Subject: Re: [PATCH 3/4] tun: Allow GSO using virtio_net_hdr
Date: Fri, 25 Jul 2008 09:54:18 +1000 [thread overview]
Message-ID: <200807250954.19120.rusty@rustcorp.com.au> (raw)
In-Reply-To: <20080724142044.GA8266@gondor.apana.org.au>
On Friday 25 July 2008 00:20:44 Herbert Xu wrote:
> On Thu, Jun 26, 2008 at 12:30:37AM +1000, Rusty Russell wrote:
> > Add a IFF_VNET_HDR flag. This uses the same ABI as virtio_net (ie.
> > prepending struct virtio_net_hdr to packets) to indicate GSO and checksum
> > information.
> >
> > Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
>
> I just noticed that we still allocate a linear skb even when GSO
> is enabled. Please fix this by allocating page frags where
> necessary. Otherwise GSO is only going to work before memory
> fragmentation sets in.
>
> IIRC I'd sent out a patch to the virt mailing list with code
> that did this.
>
> Thanks,
Hi Herbert,
Thanks for the reminder. I have this code in the virtio_net patches which
Linus failed to pull. Will just need to share it with the tun code (maybe a
skb_alloc_large() helper).
Cheers,
Rusty.
next prev parent reply other threads:[~2008-07-24 23:55 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-25 14:28 [PATCH 1/4] tun: Interface to query tun/tap features Rusty Russell
2008-06-25 14:29 ` [PATCH 2/4] tun: TUNSETFEATURES to set gso features Rusty Russell
2008-06-25 14:30 ` [PATCH 3/4] tun: Allow GSO using virtio_net_hdr Rusty Russell
2008-06-25 14:32 ` [PATCH 4/4] lguest: Use GSO/IFF_VNET_HDR extensions on tun/tap Rusty Russell
2008-06-25 15:45 ` Rusty Russell
[not found] ` <200806260032.12359.rusty__46755.7742762894$1214404667$gmane$org@rustcorp.com.au>
2008-06-25 19:07 ` Anthony Liguori
2008-06-26 4:40 ` Rusty Russell
2008-06-26 18:16 ` Anthony Liguori
2008-06-27 3:50 ` Rusty Russell
2008-07-02 5:25 ` Max Krasnyansky
2008-07-02 5:13 ` [PATCH 3/4] tun: Allow GSO using virtio_net_hdr Max Krasnyansky
2008-07-02 7:00 ` Rusty Russell
2008-07-24 14:20 ` Herbert Xu
2008-07-24 23:54 ` Rusty Russell [this message]
2008-07-02 5:02 ` [PATCH 2/4] tun: TUNSETFEATURES to set gso features Max Krasnyansky
2008-07-02 4:59 ` [PATCH 1/4] tun: Interface to query tun/tap features Max Krasnyansky
2008-07-02 5:27 ` David Miller
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