Messages in this thread | | | Date | Mon, 15 Oct 2007 14:25:46 +1000 | From | David Chinner <> | Subject | Re: Interaction between Xen and XFS: stray RW mappings |
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On Sun, Oct 14, 2007 at 09:18:17PM -0700, Jeremy Fitzhardinge wrote: > David Chinner wrote: > > With defaults - little effect as vmap should never be used. It's > > only when you start using larger block sizes for metadata that this > > becomes an issue. The CONFIG_XEN workaround should be fine until we > > get a proper vmap cache.... > > Hm, well I saw the problem with a filesystem made with mkfs.xfs with no > options, so there must be at least *some* vmapping going on there.
Sorry - I should have been more precise - vmap should never be used in performance critical paths on default configs. Log recovery will trigger vmap/vunmap usage, so this is probably what you are seeing.
Cheers,
Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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