From: "H. Peter Anvin" <hpa@zytor.com>
To: Paul Jackson <pj@sgi.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>,
ying.huang@intel.com, mingo@elte.hu, tglx@linutronix.de,
steiner@sgi.com, travis@sgi.com, linux-kernel@vger.kernel.org,
andi@firstfloor.org, akpm@linux-foundation.org
Subject: Re: [PATCH 4/8] x86 boot: allow overlapping ebda and efi memmap memory ranges
Date: Mon, 16 Jun 2008 11:18:12 -0700 [thread overview]
Message-ID: <4856AE64.7020906@zytor.com> (raw)
In-Reply-To: <20080616130938.527283f7.pj@sgi.com>
Paul Jackson wrote:
> Yinghai wrote:
>> like to see to make reserve_ebda_region() more smart like the old
>> way when andi introduced ebda_size... instead of reserve 0x9000 to
>> 0x100000 all the way.
>
> Looking back at some older kernels, that code seems to have setup an
> ebda region only if there was a non-zero real mode pointer at 0x40E.
>
> This is rather different than always setting up such a region.
>
Well, sort of. Only some very old systems will not have had one.
0x40E contains the pointer to the EBDA; this basically tests for the
existence of an EBDA at all.
-hpa
next prev parent reply other threads:[~2008-06-16 18:45 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-16 6:29 [PATCH 1/8] x86 boot: x86_64 build reserve_bootmem_generic fix Paul Jackson
2008-06-16 6:29 ` [PATCH 2/8] x86 boot: e820 code indentation fix Paul Jackson
2008-06-16 6:29 ` [PATCH 3/8] x86 boot: x86_64 efi compiler warning fix Paul Jackson
2008-06-16 6:30 ` [PATCH 4/8] x86 boot: allow overlapping ebda and efi memmap memory ranges Paul Jackson
2008-06-16 6:54 ` Yinghai Lu
2008-06-16 7:32 ` Paul Jackson
2008-06-16 7:34 ` Yinghai Lu
2008-06-16 8:31 ` Paul Jackson
2008-06-16 7:07 ` Huang, Ying
2008-06-16 8:24 ` Paul Jackson
2008-06-16 8:53 ` Huang, Ying
2008-06-16 9:09 ` Paul Jackson
2008-06-16 9:14 ` Huang, Ying
2008-06-16 15:48 ` H. Peter Anvin
2008-06-16 16:38 ` Paul Jackson
2008-06-16 17:05 ` H. Peter Anvin
2008-06-16 17:37 ` Paul Jackson
2008-06-16 17:41 ` Yinghai Lu
2008-06-16 18:09 ` Paul Jackson
2008-06-16 18:18 ` H. Peter Anvin [this message]
2008-06-16 18:53 ` Alan Cox
2008-06-16 19:58 ` H. Peter Anvin
2008-06-16 17:46 ` H. Peter Anvin
2008-06-16 18:05 ` Paul Jackson
2008-06-17 1:00 ` Huang, Ying
2008-06-16 6:30 ` [PATCH 5/8] x86 boot: remap efi systab runtime from phys to virt Paul Jackson
2008-06-16 7:02 ` Huang, Ying
2008-06-16 8:06 ` Paul Jackson
2008-06-16 8:27 ` Huang, Ying
2008-06-16 8:26 ` Paul Jackson
2008-06-16 6:30 ` [PATCH 6/8] x86 boot: virtualize the efi runtime function callback addresses Paul Jackson
2008-06-16 6:30 ` [PATCH 7/8] x86 boot: show pfn addresses in hex not decimal in some kernel info printks Paul Jackson
2008-06-16 7:05 ` Yinghai Lu
2008-06-16 8:09 ` Paul Jackson
2008-06-16 6:30 ` [PATCH 8/8] x86 boot: more consistently use type int for node ids Paul Jackson
2008-06-16 6:50 ` [PATCH 1/8] x86 boot: x86_64 build reserve_bootmem_generic fix Yinghai Lu
2008-06-16 8:40 ` Paul Jackson
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