Re: port-amd64/58410: x86_patch() panic with core ultra processor

[Patrick Welche <prlw1%welche.eu@localhost>]

The following reply was made to PR port-amd64/58410; it has been noted by GNATS.

From: Patrick Welche <prlw1%welche.eu@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: port-amd64/58410: x86_patch() panic with core ultra processor
Date: Tue, 16 Jul 2024 09:43:17 +0100

 On Sun, Jul 14, 2024 at 11:30:03PM +0000, RVP wrote:
 >  Does disabling x2apic in the kernel (like this, for instance) help:
 
 Unfortunately not:
 
 ioapic0 at mainbus0 apid 2: pa 0xfec00000, version 0x20, 120 pins
 x2APIC available but disabled -- XXX Core Ultra XXX.
 cpu0 at mainbus0 apid 16
 cpu0: Use cpuid to serialize rdtsc
 *hang*
 
 (and my guess is that should be "Use lfence to serialize rdtsc" but
 ci contains zeros)