linux-kernel - Re: [RFC][PATCH] Replace a function call chain of kmsg_dump(KMSG_DUMP

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Message-ID: <20110716162805.GA13127@srcf.ucam.org>
Date:	Sat, 16 Jul 2011 17:28:06 +0100
From:	Matthew Garrett <mjg@...hat.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Seiji Aguchi <seiji.aguchi@....com>,
	"kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Vivek Goyal <vgoyal@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Americo Wang <xiyou.wangcong@...il.com>,
	"tony.luck@...el.com" <tony.luck@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jarod Wilson <jwilson@...hat.com>,
	"hpa@...or.com" <hpa@...or.com>,
	"dle-develop@...ts.sourceforge.net" 
	<dle-develop@...ts.sourceforge.net>,
	Satoru Moriya <satoru.moriya@....com>
Subject: Re: [RFC][PATCH] Replace a function call chain of
 kmsg_dump(KMSG_DUMP_KEXEC) with static function calls

On Sat, Jul 16, 2011 at 09:16:06AM -0700, Eric W. Biederman wrote:

> What is going on with EFI support?  We are still making efi calls in
> virtual mode, and we don't have the one unified identity mapped physical
> page table that hpa and I think others were working a while back.  Even
> if because of bugs we need to transition EFI to virtual mode we can
> still set physical to virtual so we don't have to deal with the nonsense.

No, we can't. It doesn't work.

> Can we please make our EFI support ask the minimal from EFI before
> adding lots more to it?

No.

> Am I wrong in thinking that the core motivation behind this patch is
> that our EFI support sucks and thus kdump on EFI does not work on some
> platforms?

Yes, you are.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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