linux-kernel - Re: linux-next: x86_64 does not boot in Qemu

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Date:	Thu, 01 May 2008 04:35:31 -0700
From:	Mike Travis <travis@....com>
To:	Dmitri Vorobiev <dmitri.vorobiev@...il.com>
CC:	sfr@...b.auug.org.au, Ingo Molnar <mingo@...e.hu>,
	Linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: x86_64 does not boot in Qemu

Hi Dmitri,

There are 3 "fix" patches after this one (sorry about that).

	http://marc.info/?l=linux-kernel&m=120941725114635&w=4
	http://marc.info/?l=linux-kernel&m=120949583029044&w=4
	http://marc.info/?l=linux-kernel&m=120956778620842&w=4

Checking out the "latest" sched/latest it appears though that the
entire patchset has been removed.  I'll wait for Ingo's feedback
on what's up.

I will also try out your example test.

Thanks,
Mike

Dmitri Vorobiev wrote:
> Hi Stephen, Mike, Ingo,
> 
> Starting from
> 
> 
> [dmitri.vorobiev@...er linux-2.6]$ git bisect good
> 66c38e394e8c178c806266bb213f1087cd182701 is first bad commit
> commit 66c38e394e8c178c806266bb213f1087cd182701
> Author: Mike Travis <travis@....com>
> Date:   Mon Apr 28 14:09:07 2008 -0700
> 
>     x86: remove static boot_cpu_pda array v2
> 
>       * Remove the boot_cpu_pda array and pointer table from the data section.
>         Allocate the pointer table and array during init.  do_boot_cpu()
>         will reallocate the pda in node local memory and if the cpu is being
>         brought up before the bootmem array is released (after_bootmem = 0),
>         then it will free the initial pda.  This will happen for all cpus
>         present at system startup.
> 
>         This removes 512k + 32k bytes from the data section.
> 
>     For inclusion into sched-devel/latest tree.
> 
>     Based on:
>         git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
>         +   sched-devel/latest  .../mingo/linux-2.6-sched-devel.git
> 
>     Signed-off-by: Mike Travis <travis@....com>
>     Signed-off-by: Ingo Molnar <mingo@...e.hu>
> 
> <<<<
> 
> the x86_64 kernel stopped booting for me. The symptom is that no output
> whatsoever is produced after the following command:
> 
> 
> qemu-0.9.1/bin/qemu-system-x86_64 image_64.raw \
>         -kernel src/linux-2.6/arch/x86/boot/bzImage \
>         -append "console=ttyS0 root=/dev/hda1 ro" -nographic \
>         -redir tcp:2222::22 -m 512
> 
> <<<<
> 
> Qemu just hangs seemingly doing nothing. Normally, the usual boot log is
> displayed.
> 
> Bisection on linux-next leads to the commit given above. Config attached.
> 
> Thanks,
> Dmitri
> 

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