On Sun, Jan 7, 2018 at 12:07 PM, David Groep <davidg at nikhef.nl> wrote: > Dear all, > > Maybe I'm the only one - so before filing it as a bug: it appears that > the latest set of kernel patches in 3.10.0-693.11.6.el7 makes issue > 0013763 "CentOS 7.4 kernel (3.10.0-693*) fails to boot as Xen PV guest" > re-surface *also* with the CentOS PLUS kernel. But maybe in a > different way ... > > Thanks to the (great!) quick work on making the plus kernel available > (in #14330, thanks for that!) I was able to test the following > combinations: > > - 3.10.0-693.11.6.el7.centos.plus works fine on XenServer 7 HVM guests > - 3.10.0-693.11.1.el7.centos.plus works fine on XenServer 7 XenPV guests > - 3.10.0-693.11.6.el7.centos.plus crashes on boot for XS7 XenPV guests > immediately after the boot stage where the PS/2 drivers are loaded > > Crashing does not depend on the amount of VM memory or #cores/sockets. > Also, the tell-tale "mm/vmalloc.c" failure output is no longer present. > The system 'just' crashes (with the kernel log lines as below) around the > time of the i8042 controller probing. > > Obviously the stock upstream 3.10.0-693.11.6.el7 crashes as well for > XS7 XenPV guests, but that was to be expected as per 0013763. > It crashes in the same way, around the time of the i8042 probes. > > Can anyone (maybe bill_mcgonigle?) reproduce the issue? > Did the KPTI patches break the XenPV fixes in CentOS Plus per 13763? > Or is this a new XenPV issue? > You may want to be watching the centos-virt mailing list. Xen-related issues are discussed there. This thread: https://lists.centos.org/pipermail/centos-virt/2018-January/005716.html has a response from Johnny Hughes with a possible solution. Akemi