linux-kernel - Re: [PATCH 1/2] x86 boot: add E820_RESVD

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Message-Id: <1214880322.16612.3.camel@caritas-dev.intel.com>
Date:	Tue, 01 Jul 2008 10:45:22 +0800
From:	"Huang, Ying" <ying.huang@...el.com>
To:	Yinghai Lu <yhlu.kernel@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	andi@...stfloor.org, mingo@...hat.com, tglx@...utronix.de,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] x86 boot: add E820_RESVD_KERN

On Mon, 2008-06-30 at 16:20 -0700, Yinghai Lu wrote:
> On Mon, Jun 30, 2008 at 3:53 PM, Yinghai Lu <yhlu.kernel@...il.com> wrote:
> > On Mon, Jun 30, 2008 at 12:16 PM, Ingo Molnar <mingo@...e.hu> wrote:
> >>
> >> * Yinghai Lu <yhlu.kernel@...il.com> wrote:
> >>
> >>> > For find_e820_area, this is safe enough. But what about conflict
> >>> > between setup_data and ebda or ramdisk?
> >>>
> >>> can you have setup_data and ebda at the same time?
> >>>
> >>> setup_data and ramdisk should be ok, because bootloader is supposed to
> >>> make them not to be conflicts.
> >>
> >> the more sanity checks we do before relying on some crutial data, the
> >> better. It's easier to panic or sanitize data in some structured way and
> >> complain about it in the syslog than to let things get corrupted. Boot
> >> loaders are ... not unknown to be have bugs too, at times.
> >
> > to address Ying's concern, we could let reserve_setup_data
> > call reserve_early in addition to e820_update_range...
> >
> > reserve_early will panic if RAMDISK overlap efi setup_data...
> >
> 
> Ying,
> please check the attached patch
> 

Tested-by: Huang, Ying <ying.huang@...el.com>

Best Regards
Huang Ying

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