linux-kernel - Re: [Linux-NTFS-Dev] 2.6.23 regression: second access of empty ntfs file leads to D state hang

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Message-Id: <1EEFFD17-64E7-41C6-BFED-529A5794EC36@cam.ac.uk>
Date:	Fri, 2 Nov 2007 19:22:13 +0000
From:	Anton Altaparmakov <aia21@....ac.uk>
To:	Mike Galbraith <efault@....de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	ntfs-dev <linux-ntfs-dev@...ts.sourceforge.net>,
	Neil Brown <neilb@...e.de>
Subject: Re: [Linux-NTFS-Dev] 2.6.23 regression: second access of empty ntfs file leads to D	state hang

Hi Mike,

On 30 Oct 2007, at 09:23, Anton Altaparmakov wrote:
> On 30 Oct 2007, at 08:00, Mike Galbraith wrote:
>> On Mon, 2007-10-29 at 16:18 +0100, Mike Galbraith wrote:
>> Not being very good at walking away from unsolved mysteries, I  
>> chased it
>> down.  The problem is that...
>> 	commit[a32ea1e1f925399e0d81ca3f7394a44a6dafa12c] Fix read/truncate  
>> race
>> ...calls ntfs_readpage() for a zero i_size inode, which it isn't
>> accustomed to.
>
> Great, thanks for doing that!
>
>> Below is the hammer which made my box a happy camper again.
>
> Yes that will fix it but the complete solution is more involved as  
> there are three related bugs which explain why you were getting the  
> hangs after the error...  I will make a patch for all of these in  
> the next few days...


Attached is a patch that should fix this and the other related issues  
I found.

Would you be able to test it in your setup?  Thanks a lot in advance!

Best regards,

	Anton
-- 
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer, http://www.linux-ntfs.org/


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