Re: [CentOS-virt] adding xen support to grub2 got segfault running grub2-mkimage

2015-09-16 Thread Mark Pryor
http://107.185.144.55/xen/cent7/grub2/ I have properly packaged a split off of xen support in grub2 for Centos 7. No more segfaults. I have not seen anyone attempt to package this starting with the official C7 SRPM from the vaults. On Sunday, September 13, 2015 10:50 PM, Mark Pryor wrot

Re: [CentOS-virt] poor performance with dom0 on centos7

2015-09-16 Thread Christoph
Hi Im now pretty sure the problem is the DomU with NFS Server. If I write on a NFS share from other Host (bare metal or other vm) then I see on my NFS server nearly the whole time 100% io at [jbd2/dm-5-8] process... If I write on a SMB share (same partition as nfs share) from other Host then

[CentOS-virt] FYI: Some changes to libguestfs / libguestfs-winsupport / virt-v2v / virt-p2v in RHEL 7.2

2015-09-16 Thread Richard W.M. Jones
libguestfs is a set of tools for reading and modifying disk images and virtual machines. virt-v2v and virt-p2v are tools for converting guests from foreign hypervisors (especially VMware, Xen), or physical machines, to run on KVM (eg. virt-manager, OpenStack/RHOS or oVirt/RHEV). This is just a he

Re: [CentOS-virt] Using STP in kvm bridges

2015-09-16 Thread Dmitry E. Mikhailov
On 09/16/2015 03:27 PM, Dennis Jacobfeuerborn wrote: You should always enable STP on a bridge unless you have a very specific reason not to. It's a question in the area of network adminisration. STP is slow by today's standards - 50 seconds to wait until it rearranges the topology is too much.

Re: [CentOS-virt] Using STP in kvm bridges

2015-09-16 Thread Dmitry E. Mikhailov
On 09/16/2015 03:27 PM, Dennis Jacobfeuerborn wrote: You should always enable STP on a bridge unless you have a very specific reason not to. And what's the reason if you're not a hosting provider or an enterprise with heavy and complicated infrastructure? ___

Re: [CentOS-virt] Using STP in kvm bridges

2015-09-16 Thread Dmitry E. Mikhailov
On 09/16/2015 03:18 PM, C.L. Martinez wrote: Thanks Dmitry... Uhmm, but my case is: "b) you provide more then one network interface to the virtual machine". I have several kvm guests with 3 or more network interfaces ... In this case, do you recommends to enable STP?? If you are the one who manag

Re: [CentOS-virt] Using STP in kvm bridges

2015-09-16 Thread Dennis Jacobfeuerborn
On 16.09.2015 12:18, C.L. Martinez wrote: > On 09/16/2015 10:15 AM, Dmitry E. Mikhailov wrote: >> On 09/16/2015 03:02 PM, C.L. Martinez wrote: >>> What advantages and disadvantages have?? If I will want to install >>> some kvm guests that use multicast address for certain services, is it >>> rec

Re: [CentOS-virt] Using STP in kvm bridges

2015-09-16 Thread C.L. Martinez
On 09/16/2015 10:15 AM, Dmitry E. Mikhailov wrote: On 09/16/2015 03:02 PM, C.L. Martinez wrote: What advantages and disadvantages have?? If I will want to install some kvm guests that use multicast address for certain services, is it recommended to enable STP? STP has nothing to do with mult

Re: [CentOS-virt] Using STP in kvm bridges

2015-09-16 Thread Dmitry E. Mikhailov
On 09/16/2015 03:02 PM, C.L. Martinez wrote: What advantages and disadvantages have?? If I will want to install some kvm guests that use multicast address for certain services, is it recommended to enable STP? STP has nothing to do with multicast as it's an Ethernet protocol. It's developed t

[CentOS-virt] Using STP in kvm bridges

2015-09-16 Thread C.L. Martinez
Hi all, Reading docs about using bridges in a KVM environment, I have a doubt about activating STP or not in a KVM host. What advantages and disadvantages have?? If I will want to install some kvm guests that use multicast address for certain services, is it recommended to enable STP? T