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From: Rusty Russell <rusty@rustcorp.com.au>
To: virtualization@lists.linux-foundation.org
Cc: virtualization@lists.osdl.org, Herbert Xu <herbert@gondor.apana.org.au>
Subject: Re: [6/6] [VIRTIO] net: Allow receiving SG packets
Date: Sat, 19 Apr 2008 00:08:04 +1000	[thread overview]
Message-ID: <200804190008.04357.rusty@rustcorp.com.au> (raw)
In-Reply-To: <20080418032427.GE18071@gondor.apana.org.au>

On Friday 18 April 2008 13:24:27 Herbert Xu wrote:
> Finally this patch lets virtio_net receive GSO packets in addition
> to sending them.  This can definitely be optimised for the non-GSO
> case.  For comparison the Xen approach stores one page in each skb
> and uses subsequent skb's pages to construct an SG skb instead of
> preallocating the maximum amount of pages per skb.

Well, this ends up freeing the unused pages immediately which is actually 
quite nice.  We can cache them ourselves if we want, but we'd have to see if 
the page allocation/free overhead is measurable...

Thanks!
Rusty.

  reply	other threads:[~2008-04-18 14:08 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-04-18  3:12 [0/6] [NET]: virtio SG/TSO patches Herbert Xu
2008-04-18  3:14 ` [1/6] [TUN]: Add GSO support Herbert Xu
2008-04-18  3:15   ` [2/6] [TUN]: Add GSO detection Herbert Xu
2008-04-18  3:17     ` [3/6] [TUN]: Fix GSO mapping Herbert Xu
2008-04-18  3:19       ` [4/6] [KVM] virtio-net: Add SG/GSO support Herbert Xu
2008-04-18  3:21         ` [5/6] [VIRTIO] net: Add ethtool ops for SG/GSO Herbert Xu
2008-04-18  3:24           ` [6/6] [VIRTIO] net: Allow receiving SG packets Herbert Xu
2008-04-18 14:08             ` Rusty Russell [this message]
2008-04-18 14:30               ` Herbert Xu
2008-04-21 19:06             ` Rusty Russell
2008-04-21 20:04               ` David Miller
2008-04-22  1:13                 ` Herbert Xu
2008-04-22  2:50                 ` Rusty Russell
2008-04-22  2:55                   ` David Miller
2008-04-21 19:01           ` [5/6] [VIRTIO] net: Add ethtool ops for SG/GSO Rusty Russell
2008-04-22  1:15             ` Herbert Xu
2008-04-22  2:44               ` Rusty Russell
2008-05-29 10:32       ` [3/6] [TUN]: Fix GSO mapping Mark McLoughlin
2008-05-29 10:38         ` Herbert Xu

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