linux-kernel - Re: [BUG] 2.6.26-rc1 hangs during boot on UltraSPARC 5

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Date:	Thu, 08 May 2008 12:33:29 +0200
From:	Raúl Porcel <armin76@...too.org>
To:	David Miller <davem@...emloft.net>
CC:	mikpe@...uu.se, sparclinux@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [BUG] 2.6.26-rc1 hangs during boot on UltraSPARC 5

David Miller wrote:
> From: Mikael Pettersson <mikpe@...uu.se>
> Date: Tue, 6 May 2008 21:38:24 +0200
> 
>> I removed "| CON_BOOT" and got what looks like the same oops
>> Raúl Porcel reported earlier today (which he for some reason
>> sent only to the lists, not to you or me); his oops was:
> 
> I can reproduce this problem here in my t1000.
> 
> It looks like some kind of initrd regression.
> 
> Looking at the crashes, the kernel seems to be trying
> to dereference a physical address when peeking at the
> initrd instead of using a virtual one.  That's a big
> clue.
> 
> This patch should fix it:
> 
> commit d45100f7b69e3d9cd0cd5e956b6ac2c78d460d07
> Author: David S. Miller <davem@...emloft.net>
> Date:   Tue May 6 15:19:54 2008 -0700
> 
>     sparc64: Fix initrd regression.
>     
>     We die because we forget to convert initrd_start and
>     initrd_end to virtual addresses.
>     
>     Reported by Mikael Pettersson
>     
>     Signed-off-by: David S. Miller <davem@...emloft.net>
> 
> diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
> index db8e7fb..ec3e2c7 100644
> --- a/arch/sparc64/mm/init.c
> +++ b/arch/sparc64/mm/init.c
> @@ -771,6 +771,9 @@ static void __init find_ramdisk(unsigned long phys_base)
>  		initrd_end = ramdisk_image + sparc_ramdisk_size;
>  
>  		lmb_reserve(initrd_start, initrd_end);
> +
> +		initrd_start += PAGE_OFFSET;
> +		initrd_end += PAGE_OFFSET;
>  	}
>  #endif
>  }
> 

That fixed it for me as well, thanks!
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