On Thu, 2015-11-05 at 19:16 +0100, Arne Klein wrote: > Thank you. The tested versions on dom0 and domU in which the problem > occurs are: > 4.1.3-1~bpo8+1 > 3.16.7-ckt11-1+deb8u5
I've asked around upstream and it was suggested that "xen-netback: require fewer guest Rx slots when not using GSO" which is in later upstream might be relevant. Please could you try 4.3~rc7-1~exp1 from experimental in dom0 and see if that helps? It was also suggested that the contents of /sys/kernel/debug/xen- netback after the stall has occurred might contain useful information. I forgot to ask earlier but are you able to trigger this on demand and/or is there any commonality in the workloads running in the guests which trigger this (i.e. particular network services which they run) or their configurations (e..g manually disabling of offloads perhaps). Ian.
