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

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Message-ID: <20110716202753.GA16161@srcf.ucam.org>
Date:	Sat, 16 Jul 2011 21:27:53 +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 01:11:47PM -0700, Eric W. Biederman wrote:

> Without some real understanding of what is going on I'm not inclined
> to meet any of this half way and summarily reject every change to
> the kexec on panic code path.

There are platforms that simply refuse to correctly function with a 1:1 
physical/virtual mapping. But that's not the point here - this patch 
simply hardcodes saving dmesg to an EFI variable rather than using 
kmsg_dump and pstore in order to avoid handling the locking, and does 
nothing whatsoever to change the amount of EFI code involved.

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