linux-kernel - Latest brk patchset

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Message-ID: <49BC413B.5020104@zytor.com>
Date:	Sat, 14 Mar 2009 16:43:55 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Yinghai Lu <yinghai@...nel.org>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Latest brk patchset

Hi guys,

I was reviewing the latest brk patchset, and I have a question:

Why is the brk merged into the .bss, instead of being left in its own
(nobits) segment:

  .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
	__init_end = .;
	__bss_start = .;		/* BSS */
	*(.bss.page_aligned)
	*(.bss)
	. = ALIGN(4);
	__bss_stop = .;

	. = ALIGN(PAGE_SIZE);
	__brk_base = . ;
	. += 64 * 1024 ;	/* 64k slop space */
	*(.brk_reservation)	/* areas brk users have reserved */
	__brk_limit = . ;

  	_end = . ;
  }

It really doesn't make much sense to me, and is more than a bit
confusing given the symbols.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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