Help with xfs and Fedora 8

Help with xfs and Fedora 8

[Ram Natarajan]

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I have a bunch of Fedora 8 machines running Kernel 2.6.23.1.
I am noticing that the xfs partitions on these machines 'freeze up' once in
a while. I have  to manually run xfs_repair on these partitions to get them
going again. Note that SMART does not report any hard disk errors - these
are purely xfs related. I also see some xfs kernel module messages in the
kernel logs. My question is this:
Can I move to the latest xfs by recompiling xfs kernel module and xfs
support code for 2.6.23. For various technical reasons, I cannot move to a
later kernel, but it would be great if I can build the latest xfs modules
and xfs support code for 2.6.23. Does anybody know if this is possible, and
if it is possible, will it work reliably?
Thanks,
Ram

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Re: Help with xfs and Fedora 8

[Dave Chinner]

On Tue, Oct 11, 2011 at 06:23:41PM -0700, Ram Natarajan wrote:
> I have a bunch of Fedora 8 machines running Kernel 2.6.23.1.
> I am noticing that the xfs partitions on these machines 'freeze up' once in
> a while. I have  to manually run xfs_repair on these partitions to get them
> going again. Note that SMART does not report any hard disk errors - these
> are purely xfs related. I also see some xfs kernel module messages in the
> kernel logs. My question is this:
> Can I move to the latest xfs by recompiling xfs kernel module and xfs
> support code for 2.6.23.

The userspace code (xfsprogs, etc) is simple - just download the
latest and compile it.

>
> For various technical reasons, I cannot move to a
> later kernel, but it would be great if I can build the latest xfs modules
> and xfs support code for 2.6.23. Does anybody know if this is possible, and
> if it is possible, will it work reliably?

The kernel code is not so simple. Indeed, if you're not a kernel
programmer and familiar with the XFS code, then I'd put it in the
impossible basket. It'll take at least 3 months to do the backport
and adequately test it for production use, and that's if you pay an
expert to do it.

It's far, far simpler to just upgrade your machines to a more recent
distribution that it is to backport code to kernels that old....

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

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Re: Help with xfs and Fedora 8

[Christoph Hellwig]

On Thu, Oct 13, 2011 at 10:14:24AM +1100, Dave Chinner wrote:
> > For various technical reasons, I cannot move to a
> > later kernel, but it would be great if I can build the latest xfs modules
> > and xfs support code for 2.6.23. Does anybody know if this is possible, and
> > if it is possible, will it work reliably?
> 
> The kernel code is not so simple. Indeed, if you're not a kernel
> programmer and familiar with the XFS code, then I'd put it in the
> impossible basket. It'll take at least 3 months to do the backport
> and adequately test it for production use, and that's if you pay an
> expert to do it.
> 
> It's far, far simpler to just upgrade your machines to a more recent
> distribution that it is to backport code to kernels that old....

Indeed.  If you insist on an old kernel version with a semi recent XFS
please get a RHEL/Centos 5 kernel.  That one is actually labelled 2.6.18
but contains many fixes and updated components, including a relatively
new XFS codebase.

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