Re: Wierd /proc/cpuinfo with 2.4.11-pre4

Alessandro Suardi
2001-10-05T21:42:41Z

Dan Merillat wrote:
>
> From dmesg:
> CPU: Before vendor init, caps: 000001bf 00000000 00000000, vendor = 0
> Intel Pentium with F0 0F bug - workaround enabled.
> Intel old style machine check architecture supported.
> Intel old style machine check reporting enabled on CPU#0.
> CPU: After vendor init, caps: 000001bf 00000000 00000000 00000000
> CPU: After generic, caps: 000001bf 00000000 00000000 00000000
> CPU: Common caps: 000001bf 00000000 00000000 00000000
> CPU: Intel Pentium 75 - 200 stepping 0b
> Checking 'hlt' instruction... OK.
>
> Looks normal. Let's see /proc/cpuinfo...
>
> processor : 0

[snip]

> processor : 7
> vendor_id : unknown
> cpu family : 0
> model : 0
> model name : unknown
> stepping : 0
> cache size : 515 KB
> fdiv_bug : no
> hlt_bug : yes
> f00f_bug : yes
> coma_bug : yes
> fpu : no
> fpu_exception : no
> cpuid level : 0
> wp : no
> flags :
> bogomips : 644464.70
>
> Wow! That's pretty impressive, a new kernel build gives me an
> additional _7_ CPUs!
>
> Interesting bits of .config:
>
> CONFIG_M586TSC=y
> CONFIG_X86_MSR=y
> CONFIG_X86_CPUID=y
> CONFIG_NOHIGHMEM=y
> # CONFIG_HIGHMEM4G is not set
> # CONFIG_HIGHMEM64G is not set
> # CONFIG_MATH_EMULATION is not set
> CONFIG_MTRR=y
> # CONFIG_SMP is not set
> # CONFIG_X86_UP_APIC is not set
> # CONFIG_X86_UP_IOAPIC is not set
>
> Won't compile with UP APIC turned on, as others have noted.
>
> Aside from /bin/ps getting confused about the system capabilities, it
> seems stable.

Same 8-processor incorrect info on my PIII Dell laptop -
redirecting '/usr/bin/top' stderr gets this:

[asuardi@dolphin linux]$ cat x
fscanf failed on /proc/stat for cpu 1
fscanf failed on /proc/stat for cpu 2
fscanf failed on /proc/stat for cpu 3
fscanf failed on /proc/stat for cpu 4
fscanf failed on /proc/stat for cpu 5
fscanf failed on /proc/stat for cpu 6
fscanf failed on /proc/stat for cpu 7
fscanf failed on /proc/stat for cpu 1

So I'd assume anything touching /proc/cpuinfo is hosed.

--alessandro

"this is no time to get cute, it's a mad dog's promenade
so walk tall, or baby don't walk at all"
(Bruce Springsteen, 'New York City Serenade')