Hi, > 3.13.0-35 -generic? really? I found my self in a similar situation like yours and making a downgrade to that version works fine, > also you could try 3.14.9-031, it work fine for me also. yes, it's an Ubuntu Machine, I was not able to reproduce the problem here, but the workload is quite different to the nfs gateway server running on Debian. On the gateway I have tested 3.13.10 and 3.14.12 and about 30min after I/O starts, rbd hangs. Micha Krause