Physical memory error on ThinkPad 701C

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Physical memory error on ThinkPad 701C

Hans Christian Schmidt
Hi folks!

I've just installed OpenBSD 3.8 on my IBM ThinkPad 701C by booting up
from the floppyC38.tgz image. The 516 MB disk was partitioned with root,
swap, usr, var and tmp all meeting the minimum size requirements. I've
only installed "bsd", "base38.tgz", "etc38.tgz" and "man38.tgz".

There are 12 MB of RAM available. 4 MB on board and additional 8
MB installed separately. After the installation was complete I
received the following startup log:

 OpenBSD 3.8 (GENERIC) #138: Sat Sept 10 15:41:37 MDT 2005
        [hidden email]:/usr/src/sys/arch/i386/compile/GENERIC
 cpu0: Intel 486DX2 ("GenuineIntel" 486-class)
 cpu0: FPU,V86
 real mem = 12165120 (11880K)
 panic: cannot get physical memory for buffer cache
 Stopped at Debugger+0x4: leave
 RUN AT LEAST 'trace' AND 'ps' AND INCLUDE OUTPUT WHEN REPORTING THIS PANIC!
 DO NOT EVEN BOTHER REPORTING THIS WITHOUT INCLUDING THAT INFORMATION!

#ddb> trace

 Debugger(ae,d06f1f08,d06f1f28,ae000,ae) at Debugger+0x4
 panic(d0515640,d06f1f08,1,0,d2197000) at panic+0x63
 setup_buffers(d06f1f48,b000,1) at setup_buffers+0x1bb
 cput_startup(d04d6f85,d04f3ce0,d06f1fa0,d0208972,c00000= at
cpu_startup+0x109

#ddb> ps

 PID PPID PGRP UID S FLAGS WAIT COMMAND
 [empty]


Maybe these information might help too:

(Boot from floppyC38.tgz)

 boot> machine memory
 Region 0: type 1 at 0x0 for 639KB
 Region 1: type 1 at 0x100000 for 11264KB
 Low ram: 639KB  High ram: 11264KB
 Total free memory: 11903KB


I read about the RAM problem on old Compaq Armada notebooks (as
mentioned on OpenBSD.org). It's probably a similar error but I don't
know how to adjust the parameters to fit my RAM size. The Compaq example
relates to 64 MB RAM.

Openbsd.org:  boot> machine memory +0x3000000@0x1000000

http://www.openbsd.org/de/i386-laptop.html


Any suggestions?


Best regards,
Hans Christian Schmidt

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Re: Physical memory error on ThinkPad 701C

Ted Unangst-2
you just don't have enough ram to run openbsd, at least not without a
lot of tweaking to reduce the size of the kernel.

should have posted to misc, btw.

On 12/2/05, Hans Christian Schmidt <[hidden email]> wrote:

> Hi folks!
>
> I've just installed OpenBSD 3.8 on my IBM ThinkPad 701C by booting up
> from the floppyC38.tgz image. The 516 MB disk was partitioned with root,
> swap, usr, var and tmp all meeting the minimum size requirements. I've
> only installed "bsd", "base38.tgz", "etc38.tgz" and "man38.tgz".
>
> There are 12 MB of RAM available. 4 MB on board and additional 8
> MB installed separately. After the installation was complete I
> received the following startup log:
>
>  OpenBSD 3.8 (GENERIC) #138: Sat Sept 10 15:41:37 MDT 2005
>        [hidden email]:/usr/src/sys/arch/i386/compile/GENERIC
>  cpu0: Intel 486DX2 ("GenuineIntel" 486-class)
>  cpu0: FPU,V86
>  real mem = 12165120 (11880K)
>  panic: cannot get physical memory for buffer cache
>  Stopped at     Debugger+0x4:   leave
>  RUN AT LEAST 'trace' AND 'ps' AND INCLUDE OUTPUT WHEN REPORTING THIS PANIC!
>  DO NOT EVEN BOTHER REPORTING THIS WITHOUT INCLUDING THAT INFORMATION!
>
> #ddb> trace
>
>  Debugger(ae,d06f1f08,d06f1f28,ae000,ae) at Debugger+0x4
>  panic(d0515640,d06f1f08,1,0,d2197000) at panic+0x63
>  setup_buffers(d06f1f48,b000,1) at setup_buffers+0x1bb
>  cput_startup(d04d6f85,d04f3ce0,d06f1fa0,d0208972,c00000= at
> cpu_startup+0x109
>
> #ddb> ps
>
>  PID PPID PGRP UID S FLAGS WAIT COMMAND
>  [empty]
>
>
> Maybe these information might help too:
>
> (Boot from floppyC38.tgz)
>
>  boot> machine memory
>  Region 0: type 1 at 0x0 for 639KB
>  Region 1: type 1 at 0x100000 for 11264KB
>  Low ram: 639KB  High ram: 11264KB
>  Total free memory: 11903KB
>
>
> I read about the RAM problem on old Compaq Armada notebooks (as
> mentioned on OpenBSD.org). It's probably a similar error but I don't
> know how to adjust the parameters to fit my RAM size. The Compaq example
> relates to 64 MB RAM.
>
> Openbsd.org:  boot> machine memory +0x3000000@0x1000000
>
> http://www.openbsd.org/de/i386-laptop.html
>
>
> Any suggestions?
>
>
> Best regards,
> Hans Christian Schmidt