On Mon, May 16, 2016 at 07:09:44PM +0100, Richard W.M. Jones wrote: > DAX is explained in detail here: > https://lwn.net/Articles/610174/ > > This patch adds support to supermin for using a DAX root filesystem. > The corresponding libguestfs patches will be posted shortly once I've > tested them a bit more. > > This requires qemu >= 2.6. > > Unfortunately it's not really a win for a few reasons: > > - Requires enabling ACPI, which slows everything down by hundreds of > milliseconds. I need to work out exactly what's going on here. > Since we never required ACPI before now, I never had the impetus to > find out if this is easy to fix.
Good news is I have fixed the ACPI issue. The slowdown is now very minor (< 20ms). Rich. > - The extra modules in the supermin mini-initrd greatly increase its > size, which also slows things down. qemu fw_cfg DMA should help > here, if we ever manage to get it upstream. > > - vNVDIMM and DAX are not very widely tested or used yet. > > - Not supported at all by libvirt. > > Rich. > > _______________________________________________ > Libguestfs mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/libguestfs -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v _______________________________________________ Libguestfs mailing list [email protected] https://www.redhat.com/mailman/listinfo/libguestfs
