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Re: DECstation: linux-2.1.99 is out!

To: linux-mips@fnet.fr
Subject: Re: DECstation: linux-2.1.99 is out!
From: Harald Koerfgen <harald.koerfgen@netcologne.de>
Date: Sat, 13 Jun 1998 09:28:41 +0200 (MEST)
In-reply-to: <35821409.AC937350@softway.com.au>
Organization: none
Reply-to: "Harald Koerfgen" <harald.koerfgen@netcologne.de>
Sender: harry@franz.no.dom
Hi all,

On 13-Jun-98 Paul M. Antoine wrote:
> Harald wrote that he'd been able to get his ramdisk image to load and
> for his infinite loop program to run, with screen output looking like
> this:
> 
>> > Ramdisk driver initialized : 16 ramdisks of 4096K size
>> > RAMDISK: Compressed image found at block 0
>> > VFS: Mounted root (ext2 filesystem).
>> > Freeing unused kernel memory: 28k freed
>> > Warning: unable to open an initial console.
>> > do_page_fault[sh:1:7fffffb4:1:8007e950]
>> > do_page_fault[sh:1:100100c0:1:800ddb94]
>> > do_page_fault[sh:1:100100c0:1:800ddb94]
>> > do_page_fault[sh:1:004000b0:0:004000b0]
>> > do_page_fault[sh:1:004000b0:0:004000b0]
>> 
>> and then silence.
> 
> ...I have been able to upload the 2.1.99 kernel source (thanks Harald!)
> and to compile it with gcc 2.7.2 and binutils 2.8.1 (thanks Michael!),
> however the output I get is a little different:
> 
>   Ramdisk driver initialized : 16 ramdisks of 4096K size
> 
> ...then silence!!  So the ramdisk code doesn't seem to detect a valid
> ramdisk image, though it doesn't seem to complain either.
> 
> Has anyone got a suggestion?  I will try a make clean and see if that
> helps...

I've seen such strange behaviour before. Having had a somewhat working kernel 
with
ramdisk loading and everything, I have added some code which has absolutely
nothing to do with the ramdisk driver, and boom!

I thought this may be an alignment problem and that's why I have added the line

   . = ALIGN(4096)

to the .data section in arch/mips/dec/boot/ld.ecoff, and I haven't seen this 
problem
ever since. On the other hand, this may be a cache related problem as well. 

Is anybody else experiencing a similar problem?

> Regards,
> Paul (happily hacking his DECstation once more!)

Welcome back, Paul :-)

---
Regards,
Harald

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