On 9-2-2015 22:00, Konstantin Belousov wrote:
Author: kib
Date: Mon Feb 9 21:00:56 2015
New Revision: 278473
URL: https://svnweb.freebsd.org/changeset/base/278473
Log:
Add x2APIC support. Enable it by default if CPU is capable. The
hw.x2apic_enable tunable allows disabling it from the loader prompt.
Hi Konstantin,
This commit broke my Sandybridge laptop. If x2APIC is enabled the kernel
freezes after the
"ACPI APIC Table: <_ASUS_ NoteBook>" line is printed. I can't get much
information out of it since I couldn't get into the kernel debugger nor
has the machine a serial cable.
I did notice that "x2APIC" is listed in the CPU Features2 list, but for
the cpu's it reports "x2APIC: 0". I don't know if this has to do with
disabled x2APIC or some hardware/bios issue?
-Koop
Verbose dmesg with x2APIC disabled:
https://people.freebsd.org/~kwm/dmesg-x2apic.txt
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