Re: [Xen-devel] 4.10.1 Xen crash and reboot

2019-02-11 Thread Patrick Beckmann
Hi, Am 07.01.2019 um 12:12 schrieb Patrick Beckmann: > I just joined this list and am referring to > https://lists.xenproject.org/archives/html/xen-devel/2018-12/msg00938.html > > We have experienced several crashes of a recent Debian 9 Dom0 on new > hardware with Xen version "4.8.4+xsa273+shim

Re: [Xen-devel] 4.10.1 Xen crash and reboot

2019-01-30 Thread Andy Smith
Hi, On Tue, Jan 01, 2019 at 07:46:57PM +, Andy Smith wrote: > The test host is slightly different hardware to the others: Xeon > E5-1680v4 on there as opposed to Xeon D-1540 previously. > > Test host is now running with pcid=0 to see if that helps. The > longest this guest has been able to ru

Re: [Xen-devel] 4.10.1 Xen crash and reboot

2019-01-07 Thread Patrick Beckmann
Hi, I just joined this list and am referring to https://lists.xenproject.org/archives/html/xen-devel/2018-12/msg00938.html We have experienced several crashes of a recent Debian 9 Dom0 on new hardware with Xen version "4.8.4+xsa273+shim4.10.1+xsa273-1+deb9u10". After reporting it within Debian

Re: [Xen-devel] 4.10.1 Xen crash and reboot

2019-01-04 Thread Andy Smith
Hello, On Fri, Jan 04, 2019 at 03:16:32AM -0700, Jan Beulich wrote: > >>> On 01.01.19 at 20:46, wrote: > > I did move the suspect guest to a test host that does not have > > pcid=0 and 10 days later it crashed too: > > Thanks for trying this. It is now pretty clear that we need a means > to repr

Re: [Xen-devel] 4.10.1 Xen crash and reboot

2019-01-04 Thread Jan Beulich
>>> On 01.01.19 at 20:46, wrote: > On Fri, Dec 21, 2018 at 06:55:38PM +, Andy Smith wrote: >> Is it worth me moving this guest to a test host without pcid=0 to >> see if it crashes it, meanwhile keeping production hosts with >> pcid=0? And then putting pcid=0 on the test host to see if it >> s

Re: [Xen-devel] 4.10.1 Xen crash and reboot

2019-01-01 Thread Andy Smith
Hello, On Fri, Dec 21, 2018 at 06:55:38PM +, Andy Smith wrote: > Is it worth me moving this guest to a test host without pcid=0 to > see if it crashes it, meanwhile keeping production hosts with > pcid=0? And then putting pcid=0 on the test host to see if it > survives longer? I did move the

Re: [Xen-devel] 4.10.1 Xen crash and reboot

2018-12-21 Thread Andy Smith
Hello, And again today: (XEN) [ Xen-4.10.3-pre x86_64 debug=n Not tainted ] (XEN) CPU:4 (XEN) RIP:e008:[] guest_4.o#sh_page_fault__guest_4+0x70b/0x2060 (XEN) RFLAGS: 00010203 CONTEXT: hypervisor (d61v1) (XEN) rax: 00c422641dd0 rbx: 832005c49000 rcx:

Re: [Xen-devel] 4.10.1 Xen crash and reboot

2018-12-10 Thread Jan Beulich
>>> On 10.12.18 at 17:44, wrote: > Does setting pcid=0 leave me increasingly vulnerable to Meltdown > and/or negatively impact performance? I don't think there's any vulnerability concern with disabling use of PCID. On hardware without the feature we consider ourselves sufficiently mitigated afte

Re: [Xen-devel] 4.10.1 Xen crash and reboot

2018-12-10 Thread Andy Smith
Hi Jan, On Mon, Dec 10, 2018 at 09:29:34AM -0700, Jan Beulich wrote: > >>> On 10.12.18 at 16:58, wrote: > > Are there any other hypervisor command line options that would be > > beneficial to set for next time? > > Well, just like for your report from a couple of weeks ago - if this is > on PCID

Re: [Xen-devel] 4.10.1 Xen crash and reboot

2018-12-10 Thread Jan Beulich
>>> On 10.12.18 at 16:58, wrote: > Are there any other hypervisor command line options that would be > beneficial to set for next time? Well, just like for your report from a couple of weeks ago - if this is on PCID/INVPCID capable hardware, have you tried disabling use of PCID? Jan _

[Xen-devel] 4.10.1 Xen crash and reboot

2018-12-10 Thread Andy Smith
Hi, Up front information: Today one of my Xen hosts crashed with this logging on the serial: (XEN) [ Xen-4.10.1 x86_64 debug=n Not tainted ] (XEN) CPU:15 (XEN) RIP:e008:[] guest_4.o#shadow_set_l1e+0x75/0x6a0 (XEN) RFLAGS: 00010246 CONTEXT: hypervisor (d31v1) (XEN) r