File libvirt-qemu-Prohibit-chaning-affinity-of-domain-process-if-placement-is-auto.patch of Package libvirt

From 8cb54c3a66b68daf2e09548b4ddc797c31768d3a Mon Sep 17 00:00:00 2001
Message-Id: <8cb54c3a66b68daf2e09548b4ddc797c31768d3a.1351526125.git.jdenemar@redhat.com>
From: Osier Yang <jyang@redhat.com>
Date: Thu, 25 Oct 2012 10:58:17 +0800
Subject: [PATCH] qemu: Prohibit chaning affinity of domain process if
 placement is 'auto'

https://bugzilla.redhat.com/show_bug.cgi?id=870099

On one hand, numad probably will manage the affinity of domain process
dynamically in future. On the other hand, even numad won't manage it,
it still could confusion. Let's make things simpler enough to avoid
the lair for now.
(cherry picked from commit a6bd7c22ea31af5db0251733ce1321addb9d27a4)
---
 src/qemu/qemu_driver.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index cd14173..586104c 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -4205,6 +4205,13 @@ qemudDomainPinEmulator(virDomainPtr dom,
         goto cleanup;
     }
 
+    if (vm->def->placement_mode == VIR_DOMAIN_CPU_PLACEMENT_MODE_AUTO) {
+        virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+                       _("Changing affinity for emulator thread dynamically "
+                         "is not allowed when CPU placement is 'auto'"));
+        goto cleanup;
+    }
+
     if (virDomainLiveConfigHelperMethod(driver->caps, vm, &flags,
                                         &persistentDef) < 0)
         goto cleanup;
-- 
1.7.12.4