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

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Date:	Wed, 7 May 2008 20:23:50 +0200
From:	Mikael Pettersson <mikpe@...uu.se>
To:	David Miller <davem@...emloft.net>
Cc:	mikpe@...uu.se, sparclinux@...r.kernel.org,
	linux-kernel@...r.kernel.org, armin76@...too.org
Subject: Re: [BUG] 2.6.26-rc1 hangs during boot on UltraSPARC 5

David Miller writes:
 > 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
 >  }

This solved my boot problem. Thanks.

Tested-by: Mikael Pettersson <mikpe@...uu.se>
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