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

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Message-ID: <20080714120510.GB5334@kroah.com>
Date:	Mon, 14 Jul 2008 05:05:10 -0700
From:	Greg KH <greg@...ah.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Yinghai Lu <yhlu.kernel@...il.com>,
	Greg Kroah-Hartman <gregkh@...e.de>, greg.marsden@...cle.com,
	Joe Jin <joe.jin@...cle.com>, linux-kernel@...r.kernel.org,
	stable@...nel.org, Andi Kleen <andi@...stfloor.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>, tao.ma@...cle.com
Subject: Re: [stable] [PATCH] x86_64: reserve crashkernel bootmem before
	reserve dma32 bootmem

On Mon, Jul 14, 2008 at 09:27:22AM +0200, Ingo Molnar wrote:
> * 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>

Hm, Yinghai, can you resend this to stable@...nel.org so I can actually
apply it?  :)

thanks,

greg k-h
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