Re: [Xen-devel] PATCH: Jeremy''s linux 2.6.33-pvops: wrong gntdev

Jeremy Fitzhardinge
Wed, 04 Aug 2010 19:21:55 -0000

On 08/04/2010 11:43 AM, Michael Brade wrote:
> XFS has been my filesystem of choice for at least 5 years I think. Never
had
> any issues with it. Before I used reiserfs and before that I had ext2/3 but
> that one gave me too many problems so I never tried it again.
>
> Would you recommend anything else instead?

I ask because xfs does some memory mapping tricks which are actually
fairly awkward to handle in a PV Xen domain.  We end up disabling its
lazy vunmap behaviour, which means there''s a bit more overhead from tlb
flushes and the like.  I don''t know what kind of performance effect
that
actually has, or in what circumstances.

     J