netdev - Re: [Bugme-new] [Bug 16626] New: Machine hangs with EIP at skb_copy_and_csum

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Date:	Fri, 20 Aug 2010 08:03:21 +0300
From:	Plamen Petrov <pvp-lsts@...uni-ruse.bg>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	netdev@...r.kernel.org, bugzilla-daemon@...zilla.kernel.org,
	bugme-daemon@...zilla.kernel.org
Subject: Re: [Bugme-new] [Bug 16626] New: Machine hangs with EIP at skb_copy_and_csum_dev

(responding via emailed reply-to-all)

На 20.8.2010 г. 01:21, Andrew Morton написа:
>
> (switched to email.  Please respond via emailed reply-to-all, not via the
> bugzilla web interface).
>
> On Thu, 19 Aug 2010 09:57:25 GMT
> bugzilla-daemon@...zilla.kernel.org wrote:
>
>> https://bugzilla.kernel.org/show_bug.cgi?id=16626
>>
>>             Summary: Machine hangs with EIP at skb_copy_and_csum_dev
>>             Product: Drivers
>>             Version: 2.5
>>      Kernel Version: 2.6.36-rc1-00127-g763008c
>>            Platform: All
>>          OS/Version: Linux
>>                Tree: Mainline
>>              Status: NEW
>>            Severity: blocking
>>            Priority: P1
>>           Component: PCI
>>          AssignedTo: drivers_pci@...nel-bugs.osdl.org
>>          ReportedBy: pvp-lsts@...uni-ruse.bg
>>          Regression: Yes
>
> A post-2.6.35 regression.
>
>>
>> After upgrade from 2.6.33.7 to 2.6.35.2 a server hanged twice, so
>> continued on 2.6.33.7.
>>
>> Today decided to try lates Linus' tree with no luck.
>>
>> The first time I started on 2.6.36-rc1-00127-g763008c it ran for a few
>> minutes, then whent dead with this on the screen:
>> [picture 1]
>> http://picpaste.com/9cfb03116d41f27568e1bb2a67b7f4dc.jpg
>>
>> [picture 2]
>> Then I power-cycled the machine, only two get this:
>> http://picpaste.com/6d70f453e462d1aed038781ad4bdb741.jpg
>>
>> And because [picture 2] seemed too bad on the lower half of the screen,
>> here is
>> [picture 3]
>> http://picpaste.com/0a51ae079ace2e4abd9e9d29226069f7.jpg
>
> Might have triggered the BUG_ON() in skb_copy_and_csum_dev().  Might be
> a tg3 thing.  Hard to tell.
>
> It'd be really nice to get that first screenful.  Sigh.  How long have
> we had this oops-scrolls-off problem??  Perhaps you could set
> /proc/sys/kernel/printk_delay to 100 (it's in milliseconds) so that the
> oops scrolls past nice and slowly?
>
So you need the begining of the oops screen - I will try to get that
with the proposed pirntk_delay setting.
But wich kernel should I use? Linus' latest tree or 2.6.35.2 ? They
both fail the same way here, as far as I can say.
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