stray mappings left behind by xfs make xen kernels crash -> appropriate for gutsy?

[Andres Freund]

Hi,

after reading through https://wiki.ubuntu.com/StableReleaseUpdates I think 
that bug 164904 is appropriate for gutsy.
Problem:
- XFS delays vunmap and leaves stale mappings. This is considered wrong even 
in normal kernel. But as Xen uses those mappings memory corruption can occur

Why I think its appropriate for gutsy
- It causes, sometimes silent, data-corruption and crashes
- Hard to diagnose as the backtraces are quite random
- Obviously correct fix, as the fix is the fallback currently used in tight 
memory conditions.
- Patch is applied upstream

Any other Information needed?

Greetings,

Andres

PS: Could you CC me as Im not subscribed?
PPS: The thread about it at lkml: http://lkml.org/lkml/2007/10/12/298
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