linux-kernel - Re: [Patch] acpi: introduce "acpi

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Message-ID: <4D884250.3040302@redhat.com>
Date:	Tue, 22 Mar 2011 14:31:44 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Vivek Goyal <vgoyal@...hat.com>
CC:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Matthew Garrett <mjg@...hat.com>, linux-kernel@...r.kernel.org,
	Takao Indoh <tindoh@...hat.com>,
	Randy Dunlap <rdunlap@...otime.net>,
	Len Brown <lenb@...nel.org>, linux-doc@...r.kernel.org,
	linux-acpi@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [Patch] acpi: introduce "acpi_addr=" parameter for kdump

于 2011年03月21日 23:56, Vivek Goyal 写道:
>
> Matthew and I were chatting in general about it couple of days back and
> mattew suggested how about if we embrace the idea of booting the kernel
> always in physical mode (both first and second) and keep that extra set
> of pagetables around to make EFI calls. That way kexec/kdump should just
> work and kernel changes also might not be too much.
>
> The potential problem with this is that this might expose various kind
> of BIOS issues with different vendors as vendors might not test the
> physical path.

First I have to say I know a little about EFI.

I am wondering what benefits we will lose if we use physical mode?
comparing it with virtual mode? If very few, this could be a solution.

Thanks.
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