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Re: XFS contention fix backport (3.5 -> 3.2) feasible?



On Mon, 2013-03-18 at 14:42 +0100, Oliver Bock wrote:
> Hi,
> 
> [please CC me in replies, thanks]
> 
> Would it be possible to get the following fix backported to Debian
> Wheezy's 3.2 kernel series?
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=807503
> 
> RHEL just included this in their 6.4 release and I think it's an
> important patch, in particular for database servers that typically use
> XFS and would benefit a lot. Without this fix DBAs might have to resort
> to ext4 which they might not consider as a viable alternative otherwise.
>
> FYI, the patchset was originally integrated in 3.5.

Having read this:
http://thread.gmane.org/gmane.linux.kernel.stable/45323/focus=50810
my impression is that backporting XFS changes is fraught with peril.
So anyone who wants to do that had better get the result properly
reviewed and tested.  (There is a test suite available called xfstests;
and it's actually supposed to be useful for other POSIX filesystems as
well.)

I don't have the time to go through all that, so I personally won't work
on it.

Ben.

-- 
Ben Hutchings
When you say `I wrote a program that crashed Windows', people just stare ...
and say `Hey, I got those with the system, *for free*'. - Linus Torvalds

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