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

[Florian Smeets]

On 11/11/09 10:56 PM, Ed Schouten wrote:
> Hi,
>
> * Jun Kuriyama<kuriyama at FreeBSD.org>  wrote:
>> Can you test with these patches?  Testing on only one of both system
>> is enough.  "patch-1" forces disabling CLFLUSH feature even if SS bit
>> exists.  "patch-2" forces no CLFLUSH tweak.  I'd like to know with
>> which patch your system can live.
>
> For some reason they both seem to boot. Yikes. I've done some more
> testing and it seems the old version even hangs if I add some additional
> printf's above and below, which makes me believe the problem is a bit
> more complex than we realize...
>

FWIW, this also breaks my Intel Atom 330 setup.

CPU: Intel(R) Atom(TM) CPU  330   @ 1.60GHz (1606.47-MHz K8-class CPU)
   Origin = "GenuineIntel"  Id = 0x106c2  Stepping = 2
 
Features=0xbfe9fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
   Features2=0x40e31d<SSE3,DTES64,MON,DS_CPL,TM2,SSSE3,CX16,xTPR,PDCM,<b22>>
   AMD Features=0x20100800<SYSCALL,NX,LM>
   AMD Features2=0x1<LAHF>

r199066 boots, r199067 does not.

I get a page fault:

SMP: AP CPU #1 Launched!
SMP: AP CPU #2 Launched!
SMP: AP CPU #3 Launched!


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address	= 0x288
fault code		= supervisor read data, page not present
instruction pointer	= 0x20:0xffffffff802b014e
stack pointer	        = 0x28:0xffffffff8083db30
frame pointer	        = 0x28:0xffffffff8083db50
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 0 (swapper)

You can have a look at the backtrace here: 
http://smeets.im/~flo/panic_20091109.jpg

I also tried r199215, it does not help. The back trace looks almost the 
same (http://smeets.im/~flo/panic_20091112.JPG)

I can try the proposed patches tonight if it helps.

Cheers,
Florian