On Fri, Mar 09, 2012 at 06:16:54PM +0100, Paolo Bonzini wrote: > > I'm wondering whether it's worth expanding the SELinux policy if we > > will have no fstatfs(2) callers in QEMU. Are you planning to drop the > > XFS code? > > Chris Wedgwood said that on XFS you want to do discard even if the file > is preallocated, while this is not true on other filesystems. So I > guess the detection code should stay.
In generaly you do not want to discard on a preallocated file, especially not the low-granularity discard you'd get for example from a Win7 box.
