From: Eric Dumazet <eric.dumazet@gmail.com>
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: Eric Dumazet <edumazet@google.com>,
xen-devel <xen-devel@lists.xen.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
Konrad Rzeszutek Wilk <konrad@kernel.org>,
Sander Eikelenboom <linux@eikelenboom.it>
Subject: Re: compound skb frag pages appearing in start_xmit
Date: Tue, 09 Oct 2012 16:27:27 +0200 [thread overview]
Message-ID: <1349792847.21172.4479.camel@edumazet-glaptop> (raw)
In-Reply-To: <1349792241.21847.199.camel@zakaz.uk.xensource.com>
On Tue, 2012-10-09 at 15:17 +0100, Ian Campbell wrote:
> Does the higher order pages effectively reduce the number of frags which
> are in use? e.g if MAX_SKB_FRAGS is 16, then for order-0 pages you could
> have 64K worth of frag data.
>
> If we switch to order-3 pages everywhere then can the skb contain 512K
> of data, or does the effective maximum number of frags in an skb reduce
> to 2?
effective number of frags reduce to 2 or 3
(We still limit GSO packets to ~63536 bytes)
next prev parent reply other threads:[~2012-10-09 14:27 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-09 13:47 compound skb frag pages appearing in start_xmit Ian Campbell
2012-10-09 13:54 ` Eric Dumazet
2012-10-09 14:01 ` Eric Dumazet
2012-10-09 14:23 ` Ian Campbell
2012-10-09 14:33 ` Eric Dumazet
2012-10-09 14:54 ` Ian Campbell
2012-10-09 14:17 ` Ian Campbell
2012-10-09 14:27 ` Eric Dumazet [this message]
2012-10-09 14:40 ` Ian Campbell
2012-10-09 14:51 ` Eric Dumazet
2012-10-10 10:13 ` [Xen-devel] " Ian Campbell
2012-10-10 12:24 ` Sander Eikelenboom
2012-10-10 12:29 ` [Xen-devel] " Ian Campbell
2012-10-10 13:31 ` Sander Eikelenboom
2012-10-10 13:09 ` Ian Campbell
2012-10-10 14:49 ` Sander Eikelenboom
2012-10-11 8:02 ` Ian Campbell
2012-10-11 10:00 ` Sander Eikelenboom
2012-10-11 10:05 ` Eric Dumazet
2012-10-11 10:14 ` Ian Campbell
2012-10-11 10:20 ` Sander Eikelenboom
2012-11-15 2:31 ` ANNIE LI
2012-11-19 15:43 ` Sander Eikelenboom
2012-11-20 8:30 ` [Xen-devel] " Stefan Bader
2012-11-20 9:21 ` Ian Campbell
2012-11-20 11:36 ` [Xen-devel] " Ian Campbell
2012-11-21 2:42 ` ANNIE LI
2012-11-20 11:40 ` [PATCH] xen/netfront: handle compound page fragments on transmit Ian Campbell
2012-11-20 12:28 ` [Xen-devel] " Jan Beulich
2012-11-20 13:35 ` Ian Campbell
2012-11-20 13:51 ` Jan Beulich
2012-11-20 14:14 ` Ian Campbell
2012-11-20 14:32 ` Jan Beulich
2012-11-20 15:06 ` Ian Campbell
2012-11-20 15:28 ` Eric Dumazet
2012-11-20 15:54 ` Ian Campbell
2012-11-20 15:44 ` Jan Beulich
2012-11-20 16:14 ` Eric Dumazet
2012-11-20 13:30 ` Stefan Bader
2012-11-20 13:45 ` Sander Eikelenboom
2012-11-20 14:45 ` Eric Dumazet
2012-11-20 15:05 ` Ian Campbell
2012-11-21 2:52 ` ANNIE LI
2012-11-21 11:09 ` Ian Campbell
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