From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Sat, 18 Dec 2004 00:08:41 -0800
From: Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH 10/10] alternate 4-level page tables patches
Message-Id: <20041218000841.1a2e83f3.akpm@osdl.org>
In-Reply-To: <20041218073100.GA338@wotan.suse.de>
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To: Andi Kleen <ak@suse.de>
Cc: nickpiggin@yahoo.com.au, linux-mm@kvack.org, hugh@veritas.com, torvalds@osdl.org
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Andi Kleen <ak@suse.de> wrote:
>
>  Enable unit-at-a-time by default. At least with 3.3-hammer and 3.4 
>  it seems to work just fine. Has been tested with 3.3-hammer over
>  several suse releases.

iirc, we turned this off because the compiler would go nuts inlining things
and would consume too much stack:

	a()
	{
		int a1;
	}

	b()
	{
		int b1;
	}

	c()
	{
		a();
		b();
	}

Here, c() will allocate eight bytes for locals.

If gcc ever fixes up the unionisation-of-local-storage thing then we'll be
OK.

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