From b45082f02abb2790a5f6c1ff46dbd9232d3b6cb5 Mon Sep 17 00:00:00 2001
From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
Date: Mon, 7 Oct 2013 16:14:52 -0400
Subject: use cache=none to avoid data copies and bus traffic (see
 https://support.mayfirst.org/ticket/7904)

---
 kvm-manager | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kvm-manager b/kvm-manager
index 574737b..8cbd974 100755
--- a/kvm-manager
+++ b/kvm-manager
@@ -71,11 +71,11 @@ up() {
 
     index=0
     # set up the disks, if needed:
-    [ -z "$HDA" ] || KVMARGS="$KVMARGS -drive file=$HDA,if=virtio,index=$index,format=raw$first_disk_extra_args"
+    [ -z "$HDA" ] || KVMARGS="$KVMARGS -drive file=$HDA,if=virtio,cache=none,index=$index,format=raw$first_disk_extra_args"
     # loop here on everything after HDA:
     for disk in HD{B..Z}; do
 	index=$(( $index + 1 ))
-	[ \! -b "${!disk}" ] || KVMARGS="$KVMARGS -drive file=${!disk},if=virtio,index=$index,format=raw"
+	[ \! -b "${!disk}" ] || KVMARGS="$KVMARGS -drive file=${!disk},if=virtio,cache=none,index=$index,format=raw"
     done
 
     LOGNAME="$OWNERHOME/vms/$VMNAME/console"
-- 
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