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Date: Sat, 14 Mar 2009 21:43:57 -0700
From: Yinghai Lu <yinghai@kernel.org>
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To: "H. Peter Anvin" <hpa@zytor.com>
CC: Jeremy Fitzhardinge <jeremy@goop.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Latest brk patchset
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H. Peter Anvin wrote:
> On this subject, what is the point of the 64 K "slop space", and if it
> is necessary, why not just put it as a RESERVE_BRK() somewhere (*with* a
>  significant comment as to its necessity) instead of putting it as a
> hack in the linker script?
> 

32bit already have that

+INIT_MAP_SIZE = (PAGE_TABLE_SIZE + ALLOCATOR_SLOP) * PAGE_SIZE_asm
+RESERVE_BRK(pagetables, INIT_MAP_SIZE)

in head_32.S

so need to update vmlinux_32.lds.S

YH