From: Michael Breuer <mbreuer@majjas.com>
To: Jarek Poplawski <jarkao2@gmail.com>
Cc: David Miller <davem@davemloft.net>,
Stephen Hemminger <shemminger@linux-foundation.org>,
akpm@linux-foundation.org, flyboy@gmail.com,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
Michael Chan <mchan@broadcom.com>, Don Fry <pcnet32@verizon.net>,
Francois Romieu <romieu@fr.zoreil.com>,
Matt Carlson <mcarlson@broadcom.com>
Subject: Re: Hang: 2.6.32.4 sky2/DMAR (was [PATCH] sky2: Fix WARNING: at lib/dma-debug.c:902 check_sync)
Date: Fri, 22 Jan 2010 18:25:12 -0500 [thread overview]
Message-ID: <4B5A33D8.90501@majjas.com> (raw)
In-Reply-To: <20100122230605.GB3105@del.dom.local>
On 1/22/2010 6:06 PM, Jarek Poplawski wrote:
> On Fri, Jan 22, 2010 at 05:14:58PM -0500, Michael Breuer wrote:
>
>> On 1/22/2010 4:53 PM, Jarek Poplawski wrote:
>>
>>> On Fri, Jan 22, 2010 at 01:01:15PM -0500, Michael Breuer wrote:
>>>
>>>> Kernel 2.6.32.4 (git) with the following patches applied:
>>>>
>>>> af_packet.c (tpacket_snd version 3)
>>>> sky2.c pskb_may_pull
>>>> sky2 fix WARNING at lib/dma-debug.c check_sync
>>>>
>>> I guess, you meant the "sky2.c receive_copy" patch which you tested
>>> earlier, or at least you managed to crash DMAR with that patch
>>> before crashing it with Stephen's "lib/dma-debug.c check_sync" patch,
>>> right?
>>>
>>>
>> Yes - sorry, correct - all three patches were in the last run.
>> Previously, I've encountered the crash without these patches.
>>
> OK, thanks for testing - it's really very helpful, and supports
> David's opinion that dmar is a different problem.
> ...
>
>> Not sure I can do that. Note that based on the log messages, there
>> were no errors/dropped packets involving dhcp. Moving the dhcp
>> server off of the affected machine is not trivial. The dhcp
>> correlation is based on logged messages preceding each crash. I
>> cannot confirm that they're related, however it's really suspicious.
>> If it helps, HP replaced my unmanaged switch with a managed one so I
>> can see whether there were any switch events logged the next time I
>> have a crash.
>>
>> At this point, it seems the following is required to trigger the crash:
>> 1) Uptime of 24-36 hours
>> 2) High RX load on server (cifs traffic is what I've triggered it with).
>> 3) Normal DHCP traffic.
>>
> Do you mean you got these crashes with the new switch too, and this
> switch doesn't drop DHCP at all? (Otherwise, let's try this switch
> first.)
>
> Jarek P.
>
Nope - just got the new switch. Crash was old switch. That said, I don't
think (based on the log messages) that the dhcpoffer packet drop was
happening prior to the crash. I also can't fathom why a DHCPOFFER packet
dropped after leaving the server would have any bearing on the issue.
next prev parent reply other threads:[~2010-01-22 23:25 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-20 9:41 [PATCH] sky2: Fix WARNING: at lib/dma-debug.c:902 check_sync Jarek Poplawski
2010-01-20 18:03 ` Stephen Hemminger
2010-01-20 20:11 ` Michael Chan
2010-01-20 20:30 ` Stephen Hemminger
2010-01-20 20:58 ` Jarek Poplawski
2010-01-20 22:50 ` David Miller
2010-01-20 22:45 ` David Miller
2010-01-20 18:09 ` Stephen Hemminger
2010-01-20 22:24 ` Alan Cox
2010-01-20 22:53 ` David Miller
2010-01-20 22:53 ` Jarek Poplawski
2010-01-21 15:22 ` FUJITA Tomonori
2010-01-21 18:41 ` Jarek Poplawski
2010-01-22 5:11 ` FUJITA Tomonori
2010-01-22 6:38 ` David Miller
2010-02-03 1:18 ` FUJITA Tomonori
2010-02-03 1:27 ` David Miller
2010-01-21 19:59 ` Michael Breuer
2010-01-21 20:41 ` Jarek Poplawski
2010-01-21 20:46 ` Michael Breuer
2010-01-21 21:02 ` Jarek Poplawski
2010-01-22 18:01 ` Hang: 2.6.32.4 sky2/DMAR (was [PATCH] sky2: Fix WARNING: at lib/dma-debug.c:902 check_sync) Michael Breuer
2010-01-22 21:53 ` Jarek Poplawski
2010-01-22 22:14 ` Michael Breuer
2010-01-22 23:06 ` Jarek Poplawski
2010-01-22 23:25 ` Michael Breuer [this message]
2010-01-22 23:46 ` Jarek Poplawski
2010-01-22 23:50 ` Michael Breuer
2010-01-23 23:21 ` Jarek Poplawski
2010-01-24 1:53 ` Michael Breuer
2010-01-27 15:34 ` Michael Breuer
2010-01-27 16:50 ` Stephen Hemminger
2010-01-27 16:57 ` Michael Breuer
2010-01-27 17:45 ` Stephen Hemminger
2010-01-27 17:57 ` Michael Breuer
2010-01-27 18:33 ` Michael Breuer
2010-01-27 23:54 ` Hang: 2.6.32.4 sky2/DMAR David Miller
2010-01-27 17:56 ` Hang: 2.6.32.4 sky2/DMAR (was [PATCH] sky2: Fix WARNING: at lib/dma-debug.c:902 check_sync) Stephen Hemminger
2010-01-27 17:58 ` Michael Breuer
2010-01-27 18:08 ` Michael Breuer
2010-01-27 18:45 ` Michael Breuer
2010-01-27 19:23 ` Jarek Poplawski
2010-01-27 19:32 ` Jarek Poplawski
2010-01-28 15:32 ` Michael Breuer
2010-01-28 16:43 ` Michael Breuer
2010-01-28 17:08 ` Stephen Hemminger
2010-01-28 18:46 ` Michael Breuer
2010-01-28 22:34 ` Jarek Poplawski
2010-01-28 22:43 ` Michael Breuer
2010-01-28 22:56 ` Jarek Poplawski
2010-01-28 22:59 ` Michael Breuer
2010-01-28 23:36 ` [PATCH] sky2: receive dma mapping error handling Stephen Hemminger
2010-01-29 0:05 ` Michael Breuer
2010-01-30 16:30 ` Michael Breuer
2010-01-30 16:31 ` Michael Breuer
2010-01-31 0:34 ` Jarek Poplawski
2010-01-31 4:17 ` Michael Breuer
2010-01-31 22:25 ` Jarek Poplawski
2010-01-31 23:58 ` Michael Breuer
2010-01-31 4:55 ` Michael Breuer
2010-01-31 18:50 ` Michael Breuer
2010-01-31 21:58 ` Michael Breuer
2010-01-31 22:18 ` Jarek Poplawski
2010-02-01 0:19 ` Michael Breuer
2010-02-01 4:26 ` Michael Breuer
2010-02-01 10:47 ` Jarek Poplawski
2010-02-01 9:17 ` [PATCH v2] sky2: Fix transmit dma mapping handling Jarek Poplawski
2010-02-01 17:52 ` Michael Breuer
2010-02-01 18:08 ` [PATCH] sky2: receive dma mapping error handling Stephen Hemminger
2010-02-01 18:20 ` Stephen Hemminger
2010-02-01 18:44 ` Michael Breuer
2010-02-01 20:13 ` Jarek Poplawski
2010-02-01 20:41 ` Jarek Poplawski
2010-02-01 21:27 ` [PATCH v3] " Jarek Poplawski
2010-02-01 22:29 ` Stephen Hemminger
2010-02-01 22:46 ` Jarek Poplawski
2010-02-01 22:51 ` Stephen Hemminger
2010-02-01 21:42 ` [PATCH v3b resent] sky2: Fix transmit dma mapping handling Jarek Poplawski
2010-02-03 4:07 ` [PATCH] sky2: receive dma mapping error handling Michael Breuer
2010-02-03 16:47 ` Michael Breuer
2010-02-03 16:56 ` Stephen Hemminger
2010-02-03 17:07 ` Michael Breuer
2010-02-03 18:23 ` Justin P. Mattock
2010-02-03 18:25 ` Stephen Hemminger
2010-02-03 18:48 ` Justin P. Mattock
2010-02-03 17:16 ` Justin P. Mattock
2010-02-02 22:44 ` Andi Kleen
2012-01-16 16:39 ` Regression: sky2 kernel between 3.1 and 3.2.1 (last known good 3.0.9) Michael Breuer
2012-01-20 14:24 ` Michael Breuer
2012-01-20 16:10 ` Stephen Hemminger
2012-01-20 16:17 ` Michael Breuer
2012-01-20 16:26 ` Stephen Hemminger
2012-01-20 16:44 ` Michael Breuer
2012-01-21 15:29 ` Michael Breuer
2012-01-22 18:03 ` Stephen Hemminger
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