Hi Eric,
It was probalby it. Uptime 5+ hours and no problem.
Thanks for the hint, I was compiling linus tree yesterday around 12:00 UTC,
your change was added later.
Regards
Tomas
On Thu, Aug 20, 2015 at 10:29 PM, Eric Dumazet <eric.duma...@gmail.com> wrote:
> On Thu, 2015-08-20 at 21:37 +0200, Tomas Papan wrote:
>> Hi there,
>>
>> I’m observing a freeze with the recent kernel (4.2-rc7). Unfortunately I
>> can’t preserver the full traces.
>> There is nothing in the messages after reboot, I was just lucky one time to
>> see it when tail -f /var/log/messages was running.
>> This is the only line which I was able to get:
>> eth1 (e1000e): transmit queue 0 timed out
>>
>> I’ve got this message in the past, but the ethtool -K eth1 tso off solved
>> that. I’m always running
>> this command at the boot time since then. There is no issue with 4.2-rc4. It
>> is hard to bisect,
>> because this machine is used as headless server and it happens randomly
>> (usually within 2 hours).
>>
>> Do you have any idea how to trace it or what can I do?
>> Please keep me on CC since I’m not subscribed on this list
>>
>> Regards
>> Tomas
>
> I would pull latest tree from Linus and pray the bug was fixed.
>
> My feeling is that you hit the issue fixed with
>
> commit 83fccfc3940c4a2db90fd7e7079f5b465cd8c6af
> Author: Eric Dumazet <eduma...@google.com>
> Date: Thu Aug 13 15:44:51 2015 -0700
>
> inet: fix potential deadlock in reqsk_queue_unlink()
>
> When replacing del_timer() with del_timer_sync(), I introduced
> a deadlock condition :
>
> reqsk_queue_unlink() is called from inet_csk_reqsk_queue_drop()
>
> inet_csk_reqsk_queue_drop() can be called from many contexts,
> one being the timer handler itself (reqsk_timer_handler()).
>
> In this case, del_timer_sync() loops forever.
>
> Simple fix is to test if timer is pending.
>
> Fixes: 2235f2ac75fd ("inet: fix races with reqsk timers")
> Signed-off-by: Eric Dumazet <eduma...@google.com>
> Signed-off-by: David S. Miller <da...@davemloft.net>
>
>
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