Hi All, Just from yesterday, I sometimes (twice since yesterday) get the following error from the kernel: kernel : Ooops: 002 [1] SMP kernel : CR2: 0000000000000170 kernel : Ooops: 002 [2] SMP kernel : CR2: 0000000000000170 kernel : Ooops: 002 [3] SMP kernel : CR2: 0000000000000170 FYI: Box: Dell PowerEdge 1905 dual CPU Xen: 3.1 from source OS: CentOS 5.1 2.6.18.X86_64 CPUs: two Xeon E5450 I did not have any problem since yesterday, when I added another DomU. Previously I have two DomUs having no problem. The new domU was installed by copy one of the previous stable domU''s disk image. Sure I modified the IP, MAC and other configurations. The problem came out when there are 3 VMs running(not immediately, but after some arbitrary time). Any ideas? Is there a upper limit of the number of VMs on a host if xen is compiled from source? I know that the free XenoServer from Citrix has a limit of 4 VMs per host. Thanks in advance, Jia. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users