netdev - Re: Linux 3.0 release

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Date:	Fri, 22 Jul 2011 12:44:38 -0700
From:	Ben Greear <greearb@...delatech.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	David <david@...olicited.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	netdev@...r.kernel.org
Subject: Re: Linux 3.0 release

On 07/22/2011 12:21 PM, Linus Torvalds wrote:
> On Fri, Jul 22, 2011 at 12:11 PM, David<david@...olicited.net>  wrote:
>>
>> I'm getting the following warning at boot from 3.0, everything seems to be fine otherwise though.
>>
>> Jul 22 19:40:02 server kernel: [   15.526629] ------------[ cut here ]------------
>> Jul 22 19:40:02 server kernel: [   15.526635] WARNING: at kernel/timer.c:1011 del_timer_sync+0x4e/0x50()
>
> Hmm. That looks like a real bug: you shouldn't do a "del_timer_sync()"
> from an interrupt. It probably works, but it sounds like a really bad
> idea.
>
>> Jul 22 19:40:02 server kernel: [   15.526677]  [<ffffffff81054b4e>] del_timer_sync+0x4e/0x50
>> Jul 22 19:40:02 server kernel: [   15.526679]  [<ffffffff8145e224>] linkwatch_schedule_work+0x84/0xa0
>> Jul 22 19:40:02 server kernel: [   15.526681]  [<ffffffff8145e2bc>] linkwatch_fire_event+0x7c/0x100
>> Jul 22 19:40:02 server kernel: [   15.526684]  [<ffffffff8146b1ed>] netif_carrier_on+0x2d/0x40
>> Jul 22 19:40:02 server kernel: [   15.526689]  [<ffffffffa006b6fb>] __rtl8169_check_link_status+0x4b/0xc0 [r8169]
>> Jul 22 19:40:02 server kernel: [   15.526693]  [<ffffffffa006c016>] rtl8169_interrupt+0x166/0x3a0 [r8169]
>> Jul 22 19:40:02 server kernel: [   15.526696]  [<ffffffff810a4385>] handle_irq_event_percpu+0x55/0x1f0
>> Jul 22 19:40:02 server kernel: [   15.526698]  [<ffffffff810a4551>] handle_irq_event+0x31/0x50
>
> I'm not seeing a lot of changes in any of these areas, though. I
> wonder what made it start happen.

This has been around since at least 2.6.38.  I haven't tested recently
on my rtl8169 system, but I don't recall seeing any attempts to fix
it...

http://permalink.gmane.org/gmane.linux.network/193565
http://lists.openwall.net/netdev/2011/05/04/183

Thanks,
Ben


-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com

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