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Re: [Xen-devel] Re: [PATCH 8 of 13] Add a bootparameter to reserve high

To: Andi Kleen <ak@xxxxxxx>
Subject: Re: [Xen-devel] Re: [PATCH 8 of 13] Add a bootparameter to reserve high linear address space for hypervisors
From: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Date: Wed, 02 Aug 2006 14:33:45 +1000
Cc: Andrew Morton <akpm@xxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxx, Linux Kernel <linux-kernel@xxxxxxxxxxxxxxx>, Chris Wright <chrisw@xxxxxxxxxxxx>, Ian Pratt <ian.pratt@xxxxxxxxxxxxx>, "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>, Christoph Lameter <clameter@xxxxxxx>
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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)

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