On Thu, May 24, 2018 at 12:31 PM, Corbin Bird <corbinb...@charter.net>
wrote:

> FYI :
>
> Did the microcode update, compiled and installed the 4.9.101 kernel with
> it.
> After rebooting, I started having kernel hard lock problems.
>
> Before compiling / installing kernel 4.9.102, I made an addition to the
> CFLAGS var in make.conf : -mno-lwp
> ( 'lwp' is 'Light Weight Profiling' )
>
> No kernel hard locks after the reboot.
>
> Lesson Learned :
> The kernel needs to be compiled, installed, system rebooted,
> re-compiled, re-installed and re-booted again.
> Otherwise the kernel compile process doesn't adjust to the removal of
> instruction sets.
> The 'make.conf' entry is to catch any other uses, system wide.
>
>
> Config Info :
>
> Using 'sys-kernel/gentoo-sources' USE flags : experimental modules symlink
>
> -march=bdver2
>
> kernel .config settings :
> # CONFIG_PROFILING is not set
> CONFIG_HAVE_OPROFILE=y
> CONFIG_OPROFILE_NMI_TIMER=y
> CONFIG_KPROBES=y
>
>
For me dmesg says;
[    1.538275] microcode: CPU0: patch_level=0x06000852

but i still have lwp in /proc/cpuinfo. Are you at 0x06000852 ?

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