From mboxrd@z Thu Jan  1 00:00:00 1970
From: Cong Wang <amwang@redhat.com>
Subject: Re: [Patch] acpi: introduce "acpi_addr=" parameter for kdump
Date: Tue, 22 Mar 2011 14:31:44 +0800
Message-ID: <4D884250.3040302@redhat.com>
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To: Vivek Goyal <vgoyal@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>, Matthew Garrett <mjg@redhat.com>, linux-kernel@vger.kernel.org, Takao Indoh <tindoh@redhat.com>, Randy Dunlap <rdunlap@xenotime.net>, Len Brown <lenb@kernel.org>, linux-doc@vger.kernel.org, linux-acpi@vger.kernel.org, "H. Peter Anvin" <hpa@zytor.com>
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=E4=BA=8E 2011=E5=B9=B403=E6=9C=8821=E6=97=A5 23:56, Vivek Goyal =E5=86=
=99=E9=81=93:
>
> Matthew and I were chatting in general about it couple of days back a=
nd
> mattew suggested how about if we embrace the idea of booting the kern=
el
> always in physical mode (both first and second) and keep that extra s=
et
> of pagetables around to make EFI calls. That way kexec/kdump should j=
ust
> work and kernel changes also might not be too much.
>
> The potential problem with this is that this might expose various kin=
d
> of BIOS issues with different vendors as vendors might not test the
> physical path.

=46irst 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.