linux-kernel - Re: WARNING: at mm/bootmem.c:535 alloc_arch_preferred

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Date:	Wed, 1 Jul 2009 10:40:44 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Christian Kujau <lists@...dbynature.de>,
	LKML <linux-kernel@...r.kernel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	xen-devel@...ts.xensource.com
Subject: Re: WARNING: at mm/bootmem.c:535 alloc_arch_preferred_bootmem


* Pekka Enberg <penberg@...helsinki.fi> wrote:

> Hi Jeremy,
> 
> On Tue, 2009-06-30 at 13:59 -0700, Jeremy Fitzhardinge wrote:
> > > >From dc231c59194a973b80e6932bb4c162f2076635cb Mon Sep 17 00:00:00 2001
> > > From: Pekka Enberg <penberg@...helsinki.fi>
> > > Date: Tue, 30 Jun 2009 11:35:19 +0300
> > > Subject: [PATCH] xen: Use kcalloc() in xen_init_IRQ()
> > >
> > > The init_IRQ() function is now called with slab allocator initialized.
> > > Therefore, we must not use the bootmem allocator in xen_init_IRQ().
> > > Fixes the following boot-time warning:
> > >
> > >   [    0.000000] Linux version 2.6.30 (dummy@sid) (gcc version 4.4.0 (Debian 4.4.0-8) ) #1 Tue Jun 23 02:13:42 CEST 2009
> > >   [    0.000000] Command line: root=/dev/xvda1 console=hvc0 init=/sbin/init
> > >   [    0.000000] KERNEL supported cpus:
> > >   [    0.000000]   Intel GenuineIntel
> > >   [    0.000000]   AMD AuthenticAMD
> > >   [    0.000000]   Centaur CentaurHauls
> > >   [    0.000000] BIOS-provided physical RAM map:
> > >   [    0.000000]  Xen: 0000000000000000 - 00000000000a0000 (usable)
> > >   [    0.000000]  Xen: 00000000000a0000 - 0000000000100000 (reserved)
> > >   [    0.000000]  Xen: 0000000000100000 - 0000000008000000 (usable)
> > >   [    0.000000] DMI not present or invalid.
> > >   [    0.000000] last_pfn = 0x8000 max_arch_pfn = 0x400000000
> > >   [    0.000000] initial memory mapped : 0 - 20000000
> > >
> > > Reported-by: Christian Kujau <lists@...dbynature.de>
> > > Signed-off-by: Pekka Enberg <penberg@...helsinki.fi>
> > 
> > Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
> 
> Thanks! Who should pick this patch up, btw? I think it ought to go 
> to the xen subsystem tree (wherever that is).

Generally those fixes go via tip:x86/urgent - please send the patch 
with a full changelog, the signoff and acked-by lines, etc.

Thanks,

	Ingo
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