Re: [Xen-devel] [PATCH v2] x86/nmi: start NMI watchdog on CPU0 after SMP bootstrap

2018-02-19 Thread Jan Beulich
>>> On 16.02.18 at 18:46, wrote: > We're noticing a reproducible system boot hang on certain > post-Skylake platforms where the BIOS is configured in > legacy boot mode with x2APIC disabled. The system stalls > immediately after writing the first SMP initialization > sequence into APIC ICR. > > T

Re: [Xen-devel] [PATCH v2] x86/nmi: start NMI watchdog on CPU0 after SMP bootstrap

2018-02-16 Thread Alexey G
On Fri, 16 Feb 2018 17:46:48 + Igor Druzhinin wrote: >We're noticing a reproducible system boot hang on certain >post-Skylake platforms where the BIOS is configured in >legacy boot mode with x2APIC disabled. The system stalls >immediately after writing the first SMP initialization >sequence i