On 01/08/2018 12:38 AM, Akemi Yagi wrote: > On Sun, Jan 7, 2018 at 12:07 PM, David Groep <davidg@xxxxxxxxx> 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. > And specifically, this message has links to the 4.9.75 x86_64 kernel that will boot and run as a Xen PV kernel: https://lists.centos.org/pipermail/centos-virt/2018-January/005721.html Also, the latest Xen Dom0 kernel 4.9.75 kernel will also boot a DomU Xen PV. That kernel is still in testing, and also requires the latest linux-firmware rpms: https://buildlogs.centos.org/centos/7/virt/x86_64/ or https://buildlogs.centos.org/centos/6/virt/x86_64/ (And your xen version ... xen-44/, xen-46/, xen-48/) Those kernels should be signed released to the main Xen repo sometime this week. And as someone has mentioned in another thread (Phil Perry), please read Greg K-H's (the Kernel.org LTS maintainer, he is in charge of the 4.9.x LTS tree that we use for the above kernels): http://www.kroah.com/log/blog/2018/01/06/meltdown-status/ Thanks, Johnny Hughes
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