linux-kernel - Re: assfail during unmount xfs 2.6.24.3 [from 2.6.24.y git]

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Date:	Sat, 8 Mar 2008 15:55:08 -0500
From:	Chris Knadle <Chris.Knadle@...edump.us>
To:	David Chinner <dgc@....com>
Cc:	linux-kernel@...r.kernel.org, xfs@....sgi.com
Subject: Re: assfail during unmount xfs 2.6.24.3 [from 2.6.24.y git]

On Friday 07 March 2008, David Chinner wrote:
> On Thu, Mar 06, 2008 at 11:29:07PM -0500, Chris Knadle wrote:
> > During the final unmount before reboot there was an assertion failure
> > from XFS 
...
> > When replying please CC me, as I am not currently subscribed to the list.
...
> > Assertion failed: atomic_read(&mp->m_active_trans) == 0, file:
> > fs/xfs/xfs_vfsops.c, line: 708

   Thank you for taking the time to look and reply to this.

> Known problem. Race in the VFS w.r.t. read-only remounts:
>
> http://marc.info/?l=linux-kernel&m=120106649923499&w=2

   At the bottom of the above message there's a patch which is not currently 
merged in either the linux-2.6.24.y.git or linux-2.6.git trees.  That's 
perhaps as it should be, but I would like to know if it's worth trying 
merging the patch locally as an attempted workaround until such time as 
2.6.25 is released and stable.

> The fix for the problem lies outside XFS:
>
> http://marc.info/?l=linux-kernel&m=120109304227035&w=2

   If I understand the above correctly, it sounds like the per-vfsmount is 
going to be a new feature committed to 2.6.25, but probably not backported to 
prior kernel trees.  If this feature was was added at 2.6.23.9 then if I 
understand corectly it's only an issue between that version and 2.6.25; is 
that correct?

   Thanks again.
   Cheers.

   -- Chris

-- 

Chris Knadle
Chris.Knadle@...edump.us

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