linux-kernel - Re: [PATCH 1/1] MM: virtual address debug

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Message-ID: <485933C7.8050801@gmail.com>
Date:	Wed, 18 Jun 2008 18:11:51 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Ingo Molnar <mingo@...hat.com>, tglx@...utronix.de, hpa@...or.com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Andi Kleen <andi@...stfloor.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Mike Travis <travis@....com>, nickpiggin@...oo.com.au
Subject: Re: [PATCH 1/1] MM: virtual address debug

Ingo Molnar napsal(a):
> No NUMA configuration found
> Faking a node at 0000000000000000-000000003fff0000
> Entering add_active_range(0, 0, 159) 0 entries of 25600 used
> Entering add_active_range(0, 256, 262128) 1 entries of 25600 used
> Bootmem setup node 0 0000000000000000-000000003fff0000
>   NODE_DATA [000000000000a000 - 000000000003dfff]
> PANIC: early exception 06 rip 10:ffffffff80ba7531 error 0 cr2 f06f53
> Pid: 0, comm: swapper Not tainted 2.6.26-rc6 #7709
> 
> Call Trace:
>  [<ffffffff80b9c196>] early_idt_handler+0x56/0x6a
>  [<ffffffff80ba7531>] setup_node_bootmem+0x12a/0x2d4

Hmm, it's at
nid = phys_to_nid(nodedata_phys);
and
VIRTUAL_BUG_ON((addr >> memnode_shift) >= memnodemapsize);
triggers. Apparently memnodemapsize is not available for real numas. Going 
to remove the test and respin the patch with Nick's comment applied.

Thanks.
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