[Qemu-devel] qemu fast mode

[Qemu-devel] qemu fast mode

[Marc Collin]

hi

i would like to use qemu in fast mode

to do it, we need a patched kernel

we can read that here: 
http://fabrice.bellard.free.fr/qemu/qemu-doc.html#SEC23

somebody have a kernel 2.6.5.-7.111.... with this modification?

somebody can do it for me or explain me step by step how to do it?

thanks
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Re: [Qemu-devel] qemu fast mode

[Herbert Poetzl]

On Sun, Nov 07, 2004 at 10:45:14AM +0500, Marc Collin wrote:
> hi
> 
> i would like to use qemu in fast mode
> 
> to do it, we need a patched kernel
> 
> we can read that here: 
> http://fabrice.bellard.free.fr/qemu/qemu-doc.html#SEC23
> 
> somebody have a kernel 2.6.5.-7.111.... with this modification?

if you have a patch for a 2.6.5.-7.111??? kernel
(i.e. the differences between a vanilla and this one)
it should be fairly trivial to do ...

here are some patches for various kernel versions
(vanilla kernels), maybe one applies to your kernel

http://vserver.13thfloor.at/Stuff/QEMU/

> somebody can do it for me or explain me step by step how to do it?

well, if you provide 'a patch' to get from 2.6.5
(vanilla) to your 2.6.5.-7.111... then I can probably
provide a patch to make qemu-fast work ...

HTH,
Herbert

> thanks
> -- 
> La boîte à prog http://www.laboiteaprog.com
> -- 
> La boîte à prog http://www.laboiteaprog.com
> 
> 
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[Qemu-devel] qemu fast mode

[Marc Collin]

hi

i use suse 9.1 kernel 2.6.8-24.3


to use qemu fast mode we need to do:
The kernel must be mapped at 0x90000000 (the default is 0xc0000000). You must 
modify only two lines in the kernel source: In `include/asm/page.h', replace 
#define __PAGE_OFFSET           (0xc0000000)

 by 
#define __PAGE_OFFSET           (0x90000000)

 And in `arch/i386/vmlinux.lds', replace 
  . = 0xc0000000 + 0x100000;

 by 
  . = 0x90000000 + 0x100000;

i changed the value, make bzImage, make modules...

but each time i use the kernel with this hack in grub, the system reboot...

are there any problem with this kernel and qemu fast?

thanks
-- 
La boîte à prog http://www.laboiteaprog.com

Re: [Qemu-devel] qemu fast mode

[Felipe Sanchez]

On Sun, 28 Nov 2004, Marc Collin wrote:

> to use qemu fast mode we need to do:
> The kernel must be mapped at 0x90000000 (the default is 0xc0000000). You must
> modify only two lines in the kernel source: In `include/asm/page.h', replace
...
> i changed the value, make bzImage, make modules...
>
> but each time i use the kernel with this hack in grub, the system reboot...
>
> are there any problem with this kernel and qemu fast?

Hi Marc, it seems to me that you are trying to boot the *host* system with
the modified kernel. As I understand the docs, the host kernel shouldn't
need any modifications, the modified kernel should only be running in the
guest system inside qemu-fast's system emulation.