qemu 0.8.2 has a flush callback to the storage backends, so now it is
possible to implement hdparm tunable IDE write cache enable/disable for
guest domains, allowing people to pick speed or data consistency on a
case by case basis.
As an added benefit, really large LBA48 IOs will now no longer be broken
up into smaller IOs on the host side.
From: Rik van Riel <riel@redhat.com>
Signed-off-by: Christian Limpach <Christian.Limpach@xensource.com>
completion to the guest domain. The DMA_MULTI_THREAD functionality
from the qemu-dm IDE emulation should make the performance overhead
of synchronous writes bearable, or at least comparable to native
hardware.
Signed-off-by: Rik van Riel <riel@redhat.com>
[PATCH] Enable qcow in the device models.
Enable qcow in the device models.
This saves disk space when dealing with large guest images.
Signed-off-by: Nitin Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Arun Sharma <arun.sharma@intel.com>
diff -r 5d58883fc7b8 -r 499ac8e8df00 tools/ioemu/block.c
Christian Limpach
chris@kneesaa.uk.xensource.com
arun.sharma@intel.com[kaf24]
kaf24@firebug.cl.cam.ac.uk