On Sat, Mar 08, 2008 at 03:55:08PM -0500, Chris Knadle wrote:
> 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.
Sure, the patch is harmless - I've had it running in my local tree for
quite some time now.
>
> > 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.
Right.
> 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?
Only if the per-vfsmount writer counts got merged in 2.6.25-rcX. I'm not sure
that they did. Christoph?
Cheers,
Dave.
--
Dave Chinner
Principal Engineer
SGI Australian Software Group
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