commit 7f2498efe45505135ed75c6548c21a89674cb6ba
Author: Daniel Veillard <veillard@redhat.com>
Date:   Tue Sep 13 18:24:13 2011 +0800

    Do not log invalid operations in libvirtd logs
    
      This is a bit painful for example when starting virt-manager
    it tends to clutter libvirtd.log with invalid operation on cpu pinning
    for defined but not running domains. A priori those kind of errors
    don't indicate an error when executing the command but on a precondition
    for running the API, and honnestly while the application should report
    it, logging it as an error in libvirtd.log is not really useful,
    
       Related bug: https://bugzilla.redhat.com/show_bug.cgi?id=590807
    
    * daemon/libvirtd.c: extend daemonErrorLogFilter() to filter out
       errors of type VIR_ERR_OPERATION_INVALID

Index: libvirt-0.9.4/daemon/libvirtd.c
===================================================================
--- libvirt-0.9.4.orig/daemon/libvirtd.c
+++ libvirt-0.9.4/daemon/libvirtd.c
@@ -392,6 +392,7 @@ static int daemonErrorLogFilter(virError
     case VIR_ERR_NO_NWFILTER:
     case VIR_ERR_NO_SECRET:
     case VIR_ERR_NO_DOMAIN_SNAPSHOT:
+    case VIR_ERR_OPERATION_INVALID:
         return VIR_LOG_DEBUG;
     }