From 8f3f959d464ee4608a4c90c4d8cf7a7900d68ad9 Mon Sep 17 00:00:00 2001
From: Alexandre Derumier <aderumier@odiso.com>
Date: Mon, 16 Mar 2015 05:57:42 +0100
Subject: [PATCH] hv_spinlocks : use 0x1fff instead 0xffff

redhat use 0x1fff (8191)  vs 0xffff (65535)
This is the number of retries of spinlocks

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
---
 PVE/QemuServer.pm | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index db8572ba..6f0586b0 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -2866,7 +2866,11 @@ sub config_to_command {
 	    push @$globalFlags, 'kvm-pit.lost_tick_policy=discard';
 	    push @$cmd, '-no-hpet';
 	    #push @$cpuFlags , 'hv_vapic" if !$nokvm;  #fixme, my win2008R2 hang at boot with this
-	    push @$cpuFlags , 'hv_spinlocks=0xffff' if !$nokvm;
+	    if (qemu_machine_feature_enabled ($machine_type, $kvmver, 2, 3)) {
+		push @$cpuFlags , 'hv_spinlocks=0x1fff' if !$nokvm;
+	    } else { 
+		push @$cpuFlags , 'hv_spinlocks=0xffff' if !$nokvm;
+	    }
 	}
 
 	if ($ost eq 'win7' || $ost eq 'win8') {