Re: next-20090318: sunhme does not transmit packets

Re: next-20090318: sunhme does not transmit packets

[Alexander Beregalov]

2009/3/18 Alexander Beregalov <a.beregalov@gmail.com>:
> Hi
>
> Ultra 10 can boot, it receives DHCP answer, ssh works, but few minutes
> after machine becomes unresponsible by net at all.
> It does not respond even on ARP requests.
>
> On Sparc host I see that `TX packets` does not grow, but RX grows.
> The state of the interface is
> UP BROADCAST RUNNING MULTICAST
>
> There is no relevant kernel messages in dmesg.
>
> next-20090317 worked fine.
>
>
> Let me know if I can help.
>

I have reproduced it on next-20090318 for the second time, but still
do not know how.
next-20090317 might be affected.

Now both packet counters grow, but tcpdump cannot capture any packet.

Re: next-20090318: sunhme does not transmit packets

[David Miller]

From: Alexander Beregalov <a.beregalov@gmail.com>
Date: Wed, 18 Mar 2009 19:58:40 +0300

> 2009/3/18 Alexander Beregalov <a.beregalov@gmail.com>:
> > Hi
> >
> > Ultra 10 can boot, it receives DHCP answer, ssh works, but few minutes
> > after machine becomes unresponsible by net at all.
> > It does not respond even on ARP requests.
> >
> > On Sparc host I see that `TX packets` does not grow, but RX grows.
> > The state of the interface is
> > UP BROADCAST RUNNING MULTICAST
> >
> > There is no relevant kernel messages in dmesg.
> >
> > next-20090317 worked fine.
> >
> >
> > Let me know if I can help.
> >
> 
> I have reproduced it on next-20090318 for the second time, but still
> do not know how.
> next-20090317 might be affected.
> 
> Now both packet counters grow, but tcpdump cannot capture any packet.

Does the current vanilla kernel work fine?

Re: next-20090318: sunhme does not transmit packets

[Alexander Beregalov]

2009/3/19 David Miller <davem@davemloft.net>:
> From: Alexander Beregalov <a.beregalov@gmail.com>
> Date: Wed, 18 Mar 2009 19:58:40 +0300
>
>> 2009/3/18 Alexander Beregalov <a.beregalov@gmail.com>:
>> > Hi
>> >
>> > Ultra 10 can boot, it receives DHCP answer, ssh works, but few minutes
>> > after machine becomes unresponsible by net at all.
>> > It does not respond even on ARP requests.
>> >
>> > On Sparc host I see that `TX packets` does not grow, but RX grows.
>> > The state of the interface is
>> > UP BROADCAST RUNNING MULTICAST
>> >
>> > There is no relevant kernel messages in dmesg.
>> >
>> > next-20090317 worked fine.
>> >
>> >
>> > Let me know if I can help.
>> >
>>
>> I have reproduced it on next-20090318 for the second time, but still
>> do not know how.
>> next-20090317 might be affected.
>>
>> Now both packet counters grow, but tcpdump cannot capture any packet.
>
> Does the current vanilla kernel work fine?

Yes. The problem happens only with -next tree.

Re: next-20090318: sunhme does not transmit packets

[David Miller]

From: Alexander Beregalov <a.beregalov@gmail.com>
Date: Thu, 19 Mar 2009 11:16:20 +0300

> 2009/3/19 David Miller <davem@davemloft.net>:
> > Does the current vanilla kernel work fine?
> 
> Yes. The problem happens only with -next tree.

I have one of my ultra10s up and will try to reproduce and diagnose
this locally.

Thanks.

Re: next-20090318: sunhme does not transmit packets

[Alexander Beregalov]

>> 2009/3/19 David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>:
>> > Does the current vanilla kernel work fine?
>>
>> Yes. The problem happens only with -next tree.
>
> I have one of my ultra10s up and will try to reproduce and diagnose
> this locally.

Hi David

2.6.29 also does not work.

The guilty patch should be between 2.6.29-rc8 and final 2.6.29

even more narrow - 59fcbdd..v2.6.29

I can try to bisect.

Re: next-20090318: sunhme does not transmit packets

[Alexander Beregalov]

2009/3/24 Alexander Beregalov <a.beregalov@gmail.com>:
>>> 2009/3/19 David Miller <davem@davemloft.net>:
>>> > Does the current vanilla kernel work fine?
>>>
>>> Yes. The problem happens only with -next tree.
>>
>> I have one of my ultra10s up and will try to reproduce and diagnose
>> this locally.
>
> Hi David
>
> 2.6.29 also does not work.
>
> The guilty patch should be between 2.6.29-rc8 and final 2.6.29
>
> even more narrow - 59fcbdd..v2.6.29
>
> I can try to bisect.

e4a389a9b5c892446b5de2038bdc0cca8703c615 is first bad commit
commit e4a389a9b5c892446b5de2038bdc0cca8703c615
Author: Roel Kluin <roel.kluin@gmail.com>
Date:   Wed Mar 18 23:12:13 2009 -0700

    net: kfree(napi->skb) => kfree_skb

Re: next-20090318: sunhme does not transmit packets

[Alexander Beregalov]

2009/3/24 Alexander Beregalov <a.beregalov@gmail.com>:
> 2009/3/24 Alexander Beregalov <a.beregalov@gmail.com>:
>>>> 2009/3/19 David Miller <davem@davemloft.net>:
>>>> > Does the current vanilla kernel work fine?
>>>>
>>>> Yes. The problem happens only with -next tree.
>>>
>>> I have one of my ultra10s up and will try to reproduce and diagnose
>>> this locally.
>>
>> Hi David
>>
>> 2.6.29 also does not work.
>>
>> The guilty patch should be between 2.6.29-rc8 and final 2.6.29
>>
>> even more narrow - 59fcbdd..v2.6.29
>>
>> I can try to bisect.
>
> e4a389a9b5c892446b5de2038bdc0cca8703c615 is first bad commit

No, it is wrong, sorry.
I will do more tests tomorrow.

Re: next-20090318: sunhme does not transmit packets

[David Miller]

From: Alexander Beregalov <a.beregalov@gmail.com>
Date: Tue, 24 Mar 2009 18:50:55 +0300

> 2009/3/24 Alexander Beregalov <a.beregalov@gmail.com>:
> > e4a389a9b5c892446b5de2038bdc0cca8703c615 is first bad commit
> 
> No, it is wrong, sorry.
> I will do more tests tomorrow.

I bet it is the problem we are discussing here:

	http://marc.info/?l=linux-kernel&m=123789980524715&w=2

Herbert has posted two patches to try and fix this issue,
you can try the second one to see if it solves your bug
too.