There have been a few reports recently[0] which relate to a failure of netfront to allocate sufficient grant refs for all the queues:
[ 0.533589] xen_netfront: can't alloc rx grant refs [ 0.533612] net eth0: only created 31 queues Which can be worked around by increasing the number of grants on the hypervisor command line or by limiting the number of queues permitted by either back or front using a module param (which was broken but is now fixed on both sides, but I'm not sure it has been backported everywhere such that it is a reliable thing to always tell users as a workaround). Is there any plan to do anything about the default/out of the box experience? Either limiting the number of queues or making both ends cope more gracefully with failure to create some queues (or both) might be sufficient? I think the crash after the above in the first link at [0] is fixed? I think that was the purpose of ca88ea1247df "xen-netfront: update num_queues to real created" which was in 4.3. Ian. [0] http://lists.xen.org/archives/html/xen-users/2016-01/msg00100.html http://lists.xen.org/archives/html/xen-users/2016-01/msg00072.html some before hte xmas break too IIRC _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
