netdev - Re: [Xen-devel] compound skb frag pages appearing in start

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Message-ID: <878987058.20121011122004@eikelenboom.it>
Date:	Thu, 11 Oct 2012 12:20:04 +0200
From:	Sander Eikelenboom <linux@...elenboom.it>
To:	Ian Campbell <Ian.Campbell@...rix.com>
CC:	Eric Dumazet <eric.dumazet@...il.com>,
	xen-devel <xen-devel@...ts.xen.org>,
	Konrad Rzeszutek Wilk <konrad@...nel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Eric Dumazet <edumazet@...gle.com>
Subject: Re: [Xen-devel] compound skb frag pages appearing in start_xmit


Thursday, October 11, 2012, 12:14:54 PM, you wrote:

> On Thu, 2012-10-11 at 11:05 +0100, Eric Dumazet wrote:
>> On Thu, 2012-10-11 at 12:00 +0200, Sander Eikelenboom wrote:
>> 
>> > Probably due to the BUG_ON from the patch below, i changed it into a WARN_ON.
>> > And i seem to hit it, but only in one of the guests at the moment and it triggers quite irregularly.
>> 
>> xennet_make_frags() is able to split the skb->head in multiple page-size
>> chunks.
>> 
>> It should do the same for fragments

> Right, I just want to be reproduce the issue so I can know I've fixed it
> properly ;-)

Trying to scp/sftp files from a guest seems to trigger it for me ..

> Ian.





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