linux-kernel - Re: [PATCH] x86_64: reserve crashkernel bootmem before reserve dma32 bootmem

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Date:	Mon, 14 Jul 2008 09:27:22 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <yhlu.kernel@...il.com>
Cc:	Joe Jin <joe.jin@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Andi Kleen <andi@...stfloor.org>,
	greg.marsden@...cle.com, tao.ma@...cle.com,
	linux-kernel@...r.kernel.org, stable@...nel.org,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: Re: [PATCH] x86_64: reserve crashkernel bootmem before reserve
	dma32 bootmem

* Yinghai Lu <yhlu.kernel@...il.com> wrote:

> On Thu, Jul 10, 2008 at 10:32 AM, Yinghai Lu <yhlu.kernel@...il.com> wrote:
> > On Thu, Jul 10, 2008 at 5:34 AM, Joe Jin <joe.jin@...cle.com> wrote:
> >> Before reserve_crashkernel, dma32_reserve_bootmem would reserve 128M memory.
> >> this cuased crashkernel end address must less than 64M or start address must
> >> more than 192M except crashkernel memory reserved before dma32 memory reserved.
> >>
> >> This patch against 2.6.26-rc9
> >>
> >> Signed-off-by: Joe Jin <joe.jin@...cle.com>
> >> ---
> >>  setup_64.c |    4 ++--
> >>  1 file changed, 2 insertions(+), 2 deletions(-)
> >>
> >> --- linux-2.6.26-rc9/arch/x86/kernel/setup_64.c.orig    2008-07-10 16:34:12.000000000 +0800
> >> +++ linux-2.6.26-rc9/arch/x86/kernel/setup_64.c 2008-07-10 16:35:00.000000000 +0800
> >> @@ -444,8 +444,6 @@ void __init setup_arch(char **cmdline_p)
> >>        contig_initmem_init(0, end_pfn);
> >>  #endif
> >>
> >> -       dma32_reserve_bootmem();
> >> -
> >>  #ifdef CONFIG_ACPI_SLEEP
> >>        /*
> >>         * Reserve low memory region for sleep support.
> >> @@ -486,6 +484,8 @@ void __init setup_arch(char **cmdline_p)
> >>  #endif
> >>        reserve_crashkernel();
> >>
> >> +       dma32_reserve_bootmem();
> >> +
> >>        reserve_ibft_region();
> >>
> >>        paging_init();
> >
> > Acked-by: Yinghai Lu <yhlu.kernel@...il.com>
> >
> 
> Ingo,
> 
> it seems you missed this patch..., it should get into 
> 2.6.26..stable..too

no, i didnt miss it - but it was too late for v2.6.26 and it was in a 
common x86 codepath and the code in -tip there is very different. The 
fix is a proper candidate for v2.6.26.1 though - stable team Cc:-ed.

Acked-by: Ingo Molnar <mingo@...e.hu>

	Ingo
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