From: Jeremy Fitzhardinge <jeremy@goop•org>
To: unlisted-recipients:; (no To-header on input)
Cc: Andrew Morton <akpm@linux-foundation•org>,
netdev@vger•kernel.org, Chris Wright <chrisw@sous-sol•org>,
bugzilla-daemon@bugzilla•kernel.org,
bugme-daemon@bugzilla•kernel.org,
James Chapman <jchapman@katalix•com>,
heil@terminal-consulting•de,
"Xen-devel@lists•xensource.com" <Xen-devel@lists•xensource.com>,
Ian Campbell <Ian.Campbell@citrix•com>
Subject: Re: [Bugme-new] [Bug 16529] New: xennet driver crashes when using with pseudowire aka l2tpv3
Date: Wed, 25 Aug 2010 15:56:12 -0700 [thread overview]
Message-ID: <4C759F8C.9050301@goop.org> (raw)
In-Reply-To: <20100825153107.2f547f0e.akpm@linux-foundation.org>
On 08/25/2010 03:31 PM, Andrew Morton wrote:
> (switched to email. Please respond via emailed reply-to-all, not via the
> bugzilla web interface).
>
> On Fri, 6 Aug 2010 12:46:18 GMT
> bugzilla-daemon@bugzilla•kernel.org wrote:
>
>> https://bugzilla.kernel.org/show_bug.cgi?id=16529
>>
>> Summary: xennet driver crashes when using with pseudowire aka
>> l2tpv3
>> Product: Networking
>> Version: 2.5
>> Kernel Version: 2.6.35
>> Platform: All
>> OS/Version: Linux
>> Tree: Mainline
>> Status: NEW
>> Severity: normal
>> Priority: P1
>> Component: Other
>> AssignedTo: acme@ghostprotocols•net
>> ReportedBy: heil@terminal-consulting•de
>> Regression: No
>>
>>
>> I tried to use use the new l2tpv3 implementation on two xen domU's but one of
>> them is crashing when the first l2tpv3 packet is received.
>>
>> As a great man mentioned:
>> --
>> guessing that eth_type_trans() has tried to pull an ethernet header from
>> the skb and has run off the end, which suggests an issue with the skb
>> that was passed up. Does the ethernet driver do proper alignment of data
>> in its skbs? Perhaps it doesn't allocate as much headroom as other
>> drivers? Perhaps the L2TP code assumes things about the skb that aren't
>> valid..
>> --
>> Here is a link for the setup
>> http://www.pastebin.org/445975
>> and here a link with more details about the crash http://pastebin.org/449221
Please attach these to the bug or something; pastebin is not working for
me at the moment.
>> According the the hints from James Chapmann we tried generic x86 with a
>> different nic driver like e1000 and this works without any problem.
>>
>> Iam using OpenWrt to create the system images. To speed up the process i would
>> prepare Xen images, make them available or whatever is wished because
>> pseudowire is already ready in OpenWrt Trunk so that every man also with "price
>> sensitivy" hardware can use it.
>>
> Seems to be a problem with xennet afacit?
Possibly. What's a l2tpv3 and what does it do differently from other
protocols?
J
next prev parent reply other threads:[~2010-08-25 22:56 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-16529-10286@https.bugzilla.kernel.org/>
2010-08-25 22:31 ` [Bugme-new] [Bug 16529] New: xennet driver crashes when using with pseudowire aka l2tpv3 Andrew Morton
2010-08-25 22:56 ` Jeremy Fitzhardinge [this message]
2010-08-26 7:10 ` Ian Campbell
2010-08-26 7:22 ` Eric Dumazet
2010-08-26 8:03 ` Eric Dumazet
2010-08-26 8:14 ` Ian Campbell
2010-08-26 8:34 ` Eric Dumazet
2010-08-26 8:55 ` Ian Campbell
2010-08-26 9:44 ` Eric Dumazet
2010-08-26 20:30 ` David Miller
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