I'm not an expert on this, but here is what I would try: 1. Are you using the latest virtio drivers on your Windows guest(s)? http://alt.fedoraproject.org/pub/alt/virtio-win/latest/images/ 2. Is there any particular reason you use CentOS 6.4 on your storage server? I would update it to CentOS 6.5 so you would have matching Linux kernels on both of your systems. Zoltan On 2/19/2014 11:21 AM, engineer@xxxxxxxxxx wrote: > Hello. We've started a virtualisation project and got stuck in one moment. > Currently we are using the following: > Intel 2312WPQJR as a node > Intel R2312GL4GS as a storage with Intel Infiniband 2 ports controller > Infiniband Mellanox SwitchX IS5023 for commutation. > > The nodes run CentOS 6.5 with built-in Infiniband package (Linux v0002 > 2.6.32-431.el6.x86_64), the storage - CentOS 6.4 also built-in drivers > (Linux stor1.colocat.ru 2.6.32-279.el6.x86_64). > > On the storage is made an array, that is shown in system as /storage/s01. > Then it is exported via NFS. The nodes connect to NFS by: > /bin/mount -t nfs -o > rdma,port=20049,rw,hard,timeo=600,retrans=5,async,nfsvers=3,intr > 192.168.1.1:/storage/s01 /home/storage/sata/01 > mount shows: > 192.168.1.1:/storage/s01 on /home/storage/sata/01 type nfs > (rw,rdma,port=20049,hard,timeo=600,retrans=5,nfsvers=3,intr,addr=192.168.1.1) > > Then we create a virtual machine with virsh with a disk bus virtio. > All is OK, until we don't start Windows on KVM. It may work for 2 hours or > 2 days, but under heavy load it hangs the mount (i.e. /sata/02 and 03 are > accessible, but requesting 01 will result in a total hang of console). > This can be beaten only by hardware reset of the node. > If we mount without rdma - all is fine. > > What can we do in such case? If any debugs or info needed - please ask. > > Best regards, Nikolay. > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt@xxxxxxxxxx > http://lists.centos.org/mailman/listinfo/centos-virt > _______________________________________________ CentOS-virt mailing list CentOS-virt@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos-virt