svn commit: r199067 - in head/sys: amd64/amd64 i386/i386

Jun Kuriyama kuriyama at
Tue Nov 10 06:11:19 UTC 2009

At Tue, 10 Nov 2009 06:59:11 +0100,
ed at wrote:
> > (1) On MacBook, lock up occured on real hardware?  Not on hypervisor?
> Nope. The MacBook does use Apple's Boot Camp, but I can't say whether
> that can be considered to be a hypervisor. What happens, is that the
> system just locks up after probing all the device. It doesn't mount the
> root device anymore.

Hmm, I think Boot Camp is not hypervisor, and should be treated as
real hardware.  Which architecture (i386/amd64) you are using?

> > (2) On both system, is there no problem before this commit?
> I bisected it and the revision before this one does boot. I'll
> experiment with the tunables this afternoon. I really had to get some
> sleep last night, so I couldn't investigate it any further.

You can try with hw.clflush_disable="1" in loader.conf.  If you can
boot with it, I must be mistaken something (anyway its my fault).

Can you show me CPUID line at boot message (of course from the kernel
you can boot) like this?

> CPU: Dual-Core AMD Opteron(tm) Processor 2210 (1800.07-MHz K8-class CPU)
>   Origin = "AuthenticAMD"  Id = 0x40f12  Stepping = 2
>   Features2=0x2001<SSE3,CX16>
>   AMD Features=0xea500800<SYSCALL,NX,MMX+,FFXSR,RDTSCP,LM,3DNow!+,3DNow!>

Jun Kuriyama <kuriyama at> // FreeBSD Project
         <kuriyama at> // S2 Factory, Inc.

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