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From cbe9fe3834d08758bc787ac0800afb9ece6ed782 Mon Sep 17 00:00:00 2001
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From: Luiz Capitulino <lcapitulino@redhat.com>
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Date: Tue, 12 Nov 2013 17:10:04 +0100
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Subject: [PATCH 01/14] pc: drop virtio-balloon-pci event_idx compat property
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RH-Author: Luiz Capitulino <lcapitulino@redhat.com>
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Message-id: <20131112121004.12eb9431@redhat.com>
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Patchwork-id: 55664
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O-Subject: [RHEL-7.0 qemu-kvm PATCH] pc: drop virtio-balloon-pci event_idx compat property
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Bugzilla: 1029539
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>
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RH-Acked-by: Juan Quintela <quintela@redhat.com>
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Bugzilla: 1029539
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Brew-build: https://brewweb.devel.redhat.com/taskinfo?taskID=6564546
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Due to a bug, RHEL6 has never disabled the virtio-balloon-pci
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driver's event_idx property for machine types rhel6.0.0 and
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rhel6.1.0. The end result is that migration from RHEL6 to RHEL7
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fails for those machine types.
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The most obvious way to fix this problem is to fix RHEL6 to
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really disable the property. But this won't solve the problem
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for old RHEL6 binaries. Actually, it will make migration
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incompatible between old RHEL6 binaries and newer ones.
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This commit makes the mistake official instead by dropping
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the compat property for RHEL7. This fixes migration between
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RHEL6 and RHEL7 without adding any new problems.
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Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
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---
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hw/i386/pc_piix.c | 9 +++++----
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1 file changed, 5 insertions(+), 4 deletions(-)
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PS: Will post RHEL6.6 patch later.
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/i386/pc_piix.c | 9 +++++----
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1 files changed, 5 insertions(+), 4 deletions(-)
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diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
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index 8bae4c5..e6771a9 100644
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--- a/hw/i386/pc_piix.c
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+++ b/hw/i386/pc_piix.c
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@@ -1030,6 +1030,11 @@ static QEMUMachine pc_machine_rhel620 = {
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DEFAULT_MACHINE_OPTIONS,
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};
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+/*
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+ * NOTE: We don't have the event_idx compat entry for the
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+ * virtio-balloon-pci driver because RHEL6 doesn't disable
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+ * it either due to a bug (see RHBZ 1029539 fo more info)
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+ */
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#define PC_RHEL6_1_COMPAT \
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PC_RHEL6_2_COMPAT,\
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{\
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@@ -1061,10 +1066,6 @@ static QEMUMachine pc_machine_rhel620 = {
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.property = "event_idx",\
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.value = "off",\
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},{\
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- .driver = "virtio-balloon-pci",\
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- .property = "event_idx",\
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- .value = "off",\
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- },{\
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.driver = "usb-kbd",\
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.property = "serial",\
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.value = "1",\
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--
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1.7.1
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