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5 Commits
Author SHA1 Message Date
Christian Limpach 113654b9fe [qemu] hdparm tunable IDE write cache for HVM 
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>
 2006-08-20 23:59:34 +01:00
chris@kneesaa.uk.xensource.com 0a30ab0071 [qemu] Make sure disk writes really made it to disk before we report I/O 
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>
 2006-08-04 10:28:51 +01:00
chris@kneesaa.uk.xensource.com 8f4b90220c Add qemu 0.8.1 based ioemu. 
Signed-off-by: Christian Limpach <Christian.Limpach@xensource.com>
 2006-07-12 19:16:10 +01:00
chris@kneesaa.uk.xensource.com ef52abce73 Remove qemu 0.6.1 based ioemu. 
Signed-off-by: Christian Limpach <Christian.Limpach@xensource.com>
 2006-07-12 19:16:07 +01:00
kaf24@firebug.cl.cam.ac.uk 0df278a2d6 bitkeeper revision 1.1476 (428d0d8esmCTqdrDnpEQ1XlfV6CWGg) 
New qemu-based ioemu for fully virtualised guests.
Signed-off-by: Arun Sharma <arun.sharma@intel.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
 2005-05-19 22:05:02 +00:00