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Message-ID: <3D4C68C0.2090205@evision.ag>
Date: Sun, 04 Aug 2002 01:35:28 +0200
From: Marcin Dalecki <dalecki@evision.ag>
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To: Andrew Morton <akpm@zip.com.au>
CC: Petr Vandrovec <VANDROVE@vc.cvut.cz>, dalecki@evision-ventures.com,
       linux-kernel@vger.kernel.org
Subject: Re: IDE hang, partition strangeness
References: <DA7022651A@vcnet.vc.cvut.cz> <3D4AC83A.5A0E37C0@zip.com.au>
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Uz.ytkownik Andrew Morton napisa?:
> Petr Vandrovec wrote:
> 
> 
> Hi, Petr.  We're able to reproduce the ntpd thing btw.  It is
> caused by cset 1.403.142.43 "avoid allocating pte_chains for unshared
> pages" - Rik is looking into it.
> 
> 
>>On  1 Aug 02 at 23:56, Andrew Morton wrote:
>>
>>>>Seems that the partitioning code in 2.5.30 is sending illegal LBAs
>>>>to the IDE driver, which responds by hanging the box:
>>>
>>>I misread this backtrace:
>>>
>>>_this_ is the lba. 160086527.  It is the very last sector on the disk.
>>
>>Did not it issued an error on the console before that? Something
>>like 'hda: xxxx: status=YY' ?
> 
> 
> There are no error messages.
> 
> 
>>If it did, just open
>>drivers/ide/ide.c in your favorite editor, locate function ata_error,
>>in this function locate 'if (rq->errors >= ERROR_MAX)' and replace
>>it with 'if (1)'...
> 
> 
> Tried that - it made no difference.
> 
> It'd be convenient to get my IDE disks back.  I'll try the 2.4
> forward-port drivers.

I thnik the sector calculation patch intriduced by the
recent gendisk handling patches (in esp. not me) should fix this.
I suppose that we are simply asking the drive to return more data
then it contains.

I can of course try to introduce a band aid guard against such
*pysical* mismatches in ide-disk.c. At least it should
be possible to confirm the above hypothesis.



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