linux-kernel - Re: [PATCH] x86: put initial_pg

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Date:	Mon, 09 Mar 2009 08:41:31 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: put initial_pg_tables into .bss -v4

Yinghai Lu wrote:
> Impact: cleanup
> 
> Don't use ram after _end blindly for pagetables. aka init pages is before _end
> put those pg table into .bss
> 
> v2: keep initial page table up to 512M only.
> v4: put initial page tables just before _end
> 
> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> 

I still feel that this is a movement in *EXACTLY* the wrong direction,
as it is deliberately intended to prevent a general allocator for
anything that needs to be dynamic very early on.  I still think that
makes a lot more sense.

	-hpa

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