On 11/14/13, 7:37 AM, Christoph Hellwig wrote: > On Thu, Nov 14, 2013 at 08:26:58AM +1100, Dave Chinner wrote: >> Seems like that's the avenue for improvement here to me. i.e. expose >> the correct values to the guest so it's mkfs does the right thing. >> Or, alternatively, make qemu buffer non-aligned/sized IOs itself >> internally. > > I've implemented the support to expose these to the guest in qemu > years ago. But the problem remains that this is information which > needs to be attached to the image, which can't really work with raw > images, and no one has bother to implement the support to store it > for say qcow2. > Ok but once again - this is not a guest mkfs issue. The reported problem is that the guest cannot _boot_ in cache=none mode because the bios attempts a 512-byte DIO. Yes, this is all qemu's fault. We can fight that in the court of public opinion, I guess. -Eric _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
