linux-kernel - Re: deadlocks if use htb

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Date:	Thu, 18 Dec 2008 09:43:51 +0300
From:	Badalian Vyacheslav <slavon@...telecom.ru>
To:	Jarek Poplawski <jarkao2@...il.com>
CC:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: deadlocks if use htb

Hello
result: Patch 2+3 = uptime 7 days without crashes.
May i revert patches and try single new patch?

Thanks!

> On Thu, Dec 11, 2008 at 08:46:06AM +0000, Jarek Poplawski wrote:
>   
>> On Wed, Dec 10, 2008 at 06:14:28PM +0300, Badalian Vyacheslav wrote:
>>     
>>> Hello again! Sorry for long away.
>>>       
>> Hi!
>>
>>     
>>> I was go away from this work for long time.
>>>
>>> May we return to this bug?
>>> Servers at last stable kernel 2.6.27.8
>>> HZ=1000, HR=off, DynamicTicks=off, hysteresis=1
>>> Sorry - no patched, update do not i. Do you have fresh patches or ideas
>>> for tests?
>>>       
>> Not much, but I can have if you only are willing to test them...
>> I attach below a patch which combines 2 patches I sent yesterday to
>> netdev (PATCH 7/6 and 8/6) vs. 2.6.27.7 (named testing patch #3 here).
>>
>> You can still try the testing patch #2 I sent previously (quoted below)
>> with or without this new #3 patch.
>>
>>     
>
> Here is another idea worth checking (instead of patch #2).
>
> Jarek P.
>
> --- (testing patch #4)
>
> diff -Nurp a2.6.27.7/net/sched/sch_htb.c b2.6.27.7/net/sched/sch_htb.c
> --- a2.6.27.7/net/sched/sch_htb.c	2008-12-11 08:16:16.000000000 +0000
> +++ b2.6.27.7/net/sched/sch_htb.c	2008-12-15 10:44:32.000000000 +0000
> @@ -924,6 +924,7 @@ static struct sk_buff *htb_dequeue(struc
>  		}
>  	}
>  	sch->qstats.overlimits++;
> +	qdisc_watchdog_cancel(&q->watchdog);
>  	qdisc_watchdog_schedule(&q->watchdog, next_event);
>  fin:
>  	return skb;
>
>
>   

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