I run a set of media encoding servers in KVM VMs running lucid. They run a few FFMPEG processes and write to one of several Linux NFS servers. I get this kind of NFS hang every day or two, so I have been trying different strategies (different virtual NIC types, different kernel versions, etc).
Long story short, I have the kern.log from a server during the hang and the time leading up to it, and I had /proc/sys/sunrpc/rpc_debug set to 32767 all along. The excerpt of the two-minute interval surrounding the hang is 18M and compresses down to 831K. All this on Linux ftrans-03 2.6.38-4-generic-pae #31~lucid1-Ubuntu SMP Thu Feb 17 13:41:45 UTC 2011 i686 GNU/Linux. Single virtual CPU, 1G of memory. ** Attachment added: "compressed RPC debug log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/661294/+attachment/1884260/+files/diary-of-an-nfs-crash.log.bz2 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/661294 Title: System lock-up when receiving large files (big data amount) from NFS server -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
