linux-kernel - Re: Strange crash on Dell R720xd

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Date:	Tue, 16 Oct 2012 11:26:01 +0200
From:	Laurent CARON <lcaron@...x-scripts.info>
To:	Borislav Petkov <bp@...en8.de>, linux-kernel@...r.kernel.org,
	linux-raid@...r.kernel.org
Subject: Re: Strange crash on Dell R720xd

On Tue, Oct 16, 2012 at 11:03:53AM +0200, Borislav Petkov wrote:
> That's:
> 
>                 BUG_ON(async_tx_test_ack(depend_tx) || txd_next(depend_tx) ||
> 			txd_parent(tx));
> 
> but probably the b0rkage happens up the stack. And this __raid_run_ops
> is probably starting the whole TX so maybe we should add
> linux-raid@...r.kernel.org to CC. Added.


Hi,

The machines seem stable after disabling I/O AT DMA at the BIOS level.

> What is that "r510" thing in the kernel version? You have your patches
> ontop? If yes, please try reproducing this with a kernel.org kernel
> without anything else ontop.

My kernel is vanilla from Kernel.org. The -r510 string is because I
tried it on a -r510 also.

> Also, it might be worth trying plain 3.6 to rule out a regression
> introduced in the stable 3.6 series.

I tried 3.5.x, 3.6, 3.6.1, 3.6.2 with exactly the same results.

For now, I did create more volumes, rsync lors of data over the network
to the disks with no crashs (after disabling I/O AT DMA).

...snip...

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