[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] (XEN) APIC error on CPU0: 40(00)
>>> On 04.11.15 at 22:09, <securef33d@xxxxxxxxx> wrote: > On 04/11/2015 17:13, Jan Beulich wrote: >>>>> On 04.11.15 at 16:15, <securef33d@xxxxxxxxx> wrote: >>> Hi, >>> i just build the latest 4.3.0 kernel and ran it on qubes-os with xen >>> 4.4.3. I get this error just before the reboot: >>> >>> [(XEN) APIC error on CPU0: 40(00) >> >> And this appeared with the switch to kernel 4.3? No other variable >> (e.g. all config options new in 4.3 turned off)? I ask because the >> APIC is driven by Xen, not the kernel, and hence the kernel should >> have no (direct) influence on APIC behavior. > > This started with 4.3.0, with 4.3.0-rc7 the system was booting properly > (except for the xsave=0 workaround, without that i also get a crash dump > right before the APIC error). Now that's a pretty narrow window. I just looked at the source diff, without spotting anything even just remotely suspicious. Such a narrow window would of course allow for relatively quick and simple bisection... Just to ask the unanswered part of the previous question again: There were _no_ other changes to the system? I.e. if you go back to -rc7 now, you don't see the problem anymore? >>> (XEN) Resetting with ACPI MEMORY or I/O RESET_REG. I'm not aware of a code path leading here without any other Xen messages, and without the reboot having been initiated by Dom0. >>> My machine runs on skylake cpu with z170 chipset and the latest bios. >>> Any ideas on how to fix this? >> >> Not without first figuring out what bad vector is being received >> by the APIC, which likely will involved quite a bit of debugging >> and code instrumentation. > > Do you think that this could be caused by some sort of hardware/firmware > issue? Unlikely, but not entirely impossible. Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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