On 11/11/10 16:37, Aneesh Kumar K. V wrote:
On Thu, 11 Nov 2010 12:59:24 +0100, Gerd Hoffmann<kra...@redhat.com> wrote:
Hi,
This tiny patch series adds msi support for virtfs. It's two patches
only because we need a compat property to stay compatible with -stable
and we don't have a pc-0.14 machine type yet, so this is added first.
Sorry for being dumb. But what does the above change help to achieve.
msi support makes the IRQ handling more efficient (no IRQ sharing, no
need to ack the IRQ to the ioapic). Look at /proc/interupts with and
without the patch ...
The compat property is for migration compatibility: qemu 0.14 should be
able to migrate to 0.13 with -M pc-0.13. To archive that we have to
disable new stuff which affects the savevm format (msi support does).
HTH
Gerd
