linux-kernel - Re: [4/4] 2.6.23-rc3: known regressions v3

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Message-ID: <46CF31CE.306@vmware.com>
Date:	Fri, 24 Aug 2007 12:30:22 -0700
From:	Zachary Amsden <zach@...are.com>
To:	Parag Warudkar <parag.warudkar@...il.com>
CC:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-usb-devel@...ts.sourceforge.net, Greg KH <gregkh@...e.de>,
	Alan Stern <stern@...land.harvard.edu>,
	Oliver Neukum <oliver@...kum.org>,
	Tino Keitel <tino.keitel@....de>, linux-alpha@...r.kernel.org,
	Richard Henderson <rth@...ddle.net>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Oliver Falk <oliver@...ux-kernel.at>,
	Chris Wright <chrisw@...s-sol.org>
Subject: Re: [4/4] 2.6.23-rc3: known regressions v3

Parag Warudkar wrote:
> On 8/24/07, Michal Piotrowski <michal.k.k.piotrowski@...il.com> wrote:
>   
>
>> Virtualization
>>
>> Subject         : CONFIG_VMI broken
>> References      : http://lkml.org/lkml/2007/8/14/203
>> Last known good : ?
>> Submitter       : Parag Warudkar <parag.warudkar@...il.com>
>> Caused-By       : ?
>> Handled-By      : Zachary Amsden <zach@...are.com>
>> Status          : problem is being debugged
>>     
>
> Zach seemed to think that this is already fixed - I am not in a
> position to test it immediately so if we know what fixed this - can be
> closed. I'll report back once I get a chance to test latest git.
>   

Parag, thanks.  I reproduced this bug with your kernel config on 
2.6.23-rc3 and verified it does not happen on latest git.  I inspected 
memory after the crash and determined the problem was patching of 
instructions went awry.  Chris in the meantime fixed a bug with patching 
instructions, and the change from 100% apocalyptic failure to 100% 
unequivocal success has convinced me that was the same bug.

Zach
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