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From: Paul Jackson <pj@sgi.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: ying.huang@intel.com, mingo@elte.hu, tglx@linutronix.de,
	yhlu.kernel@gmail.com, 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 13:05:03 -0500	[thread overview]
Message-ID: <20080616130503.1a3a72dc.pj@sgi.com> (raw)
In-Reply-To: <4856A6F9.3090605@zytor.com>

hpa wrote:
> We *are* going to have similar hacks.  That's not a question.

I agree ;)  That's not the question.  I have no religious objection
to hacks.  I just try to keep their population in check.  In some
cases (PC BIOS and EFI come to mind ;) I am less successful than
in other cases.

> *Not* perpetuating may ... cause odd behaviours that only are
> noticeable when you, say, boot from one OS into another.

So I take it you are saying that the future permutations and, in this
case with nested boots, combinations are sufficiently diverse and
unpredictable that as a practical matter we should perpeturate this
(gentle) hack.

I'm fine with that.

Huang - would you agree to this safety reservation of the ebda area
even on EFI enabled systems?

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@sgi.com> 1.940.382.4214

  reply	other threads:[~2008-06-16 18:05 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
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 [this message]
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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