linux-kernel - Re: 9a2d43b: __alloc_bootmem

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Date:	Sun, 24 Aug 2008 01:22:54 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Vegard Nossum" <vegard.nossum@...il.com>
Cc:	"Johannes Weiner" <hannes@...urebad.de>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: 9a2d43b: __alloc_bootmem_core(): zero-sized request

On Sun, Aug 24, 2008 at 12:58 AM, Vegard Nossum <vegard.nossum@...il.com> wrote:
> On Sat, Aug 23, 2008 at 9:12 AM, Johannes Weiner <hannes@...urebad.de> wrote:
>> "Vegard Nossum" <vegard.nossum@...il.com> writes:
>>>
>>> I was trying out
>>>
>>> commit 9a2d43b7566caeeeb414aa628bc2759028897dbb
>>> Date:   Tue Jul 15 21:21:43 2008 +0200
>>>
>>> ..as part of the debugging of a different issue, but I got this:
>>>
>>> __alloc_bootmem_core(): zero-sized request
>
> [...]
>
>>> I saw some bootmem errata lately, can I cherry-pick anything to fix
>>> this?
>>
>> This behaviour hasn't changed after the rewrite.
>
> Yep, the error is somewhere else.
>
> Inserted a printk("nr_kernel_pages = %llu\n", nr_kernel_pages); and
> this is the output:
>
> nr_kernel_pages = 13869392367443771392
>
> ...it looks very, very big. I think this is initialized via
> free_area_init_*() functions, which come from arch code. Does x86
> experts know if any of this changed recently (i.e. after July 15)?
>
> The whole dmesg and config can be seen here:
> http://userweb.kernel.org/~vegard/bugs/20080824-numa/
>

seems something wrong about apic probe...

MPTABLE: OEM ID: Intel    Product ID: Lakeport     Warning!  May not
be a NUMA-Q system!
MPTABLE: Product ID: Lakeport     <6>MPTABLE: APIC at: 0xFEE00000
Processor #0 15:6 APIC version 20 (quad 0, apic 1)
Processor #0 (Bootup-CPU)
Bus #0 is PCI    (node 0)
Bus #1 is PCI    (node 0)
Bus #2 is PCI    (node 0)
Bus #3 is ISA    (node 0)
I/O APIC #2 Version 32 at 0xFEC00000.
Enabling APIC mode:  NUMA-Q.  Using 1 I/O APICs


please check with tip/master to see if it is fixed already...

YH
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