linux-kernel - Re: [Xen-devel] Re: [PATCH 8 of 13] Add a bootparameter to reserve high linear address space for hypervisors

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Date:	Wed, 02 Aug 2006 14:33:45 +1000
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Andi Kleen <ak@...e.de>
Cc:	Andrew Morton <akpm@...l.org>,
	Xen-devel <xen-devel@...ts.xensource.com>,
	Ian Pratt <ian.pratt@...source.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Chris Wright <chrisw@...s-sol.org>,
	virtualization@...ts.osdl.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Christoph Lameter <clameter@....com>
Subject: Re: [Xen-devel] Re: [PATCH 8 of 13] Add a bootparameter to reserve
	high linear address space for hypervisors

On Wed, 2006-08-02 at 06:21 +0200, Andi Kleen wrote:
> > 	I think you misunderstand the purpose of parse_early_param?  It is
> > designed to be called directly by the arch at some point (it is
> > idempotent, so the second call in init/main.c does nothing if the arch
> > has called it).  ie. in i386, it replaces parse_cmdline_early().
> 
> Ah I didn't realize that. But why is there a second call in init/main.c?  
> Looks like a big hack to me. Someone was too lazy to add it to all architectures?

Yes.  Someone == me.  I didn't want to hack it into all archs, I wanted
archs to actually use it, and you can see that's not a trivial patch...

Once all archs use it, we can probably clean up setup_arch() not to take
the char** and simply use the global saved_command_line directly.  At
this rate, that'll be around 2012 8)

Rusty.
-- 
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