linux-kernel - Re: 2.6.20 kernel hang with USB drive and vfat doing ftruncate

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Message-ID: <874ppg924p.fsf@duaron.myhome.or.jp>
Date:	Wed, 21 Feb 2007 02:20:54 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	Kumar Gala <galak@...nel.crashing.org>
Cc:	Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.20 kernel hang with USB drive and vfat doing ftruncate

Kumar Gala <galak@...nel.crashing.org> writes:

> On Feb 19, 2007, at 4:19 PM, OGAWA Hirofumi wrote:
>
>> Kumar Gala <galak@...nel.crashing.org> writes:
>>
>>> Once the system locks up I dont have any ability to do anything.
>>
>> Ah, doesn't sysrq also work? If sysrq work, it can use to see IO
>> request state with a patch.
>
> Yeah, got sysrq working today.  If you can point me at the patch I  
> happy to apply it and get data.

Ok, please try attached patch. I hope it helps you.
BTW, new sysrq is sysrq-j, and it will show disk stats.
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>


View attachment "debug-block.patch" of type "text/x-diff" (2822 bytes)