linux-kernel - Re: Linux 2.6.20-rc7

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Date:	Wed, 31 Jan 2007 16:26:31 -0800
From:	Andrew Morton <akpm@...l.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	PaweÅ Sikora <pluto@...k.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@....de>,
	Pekka Enberg <penberg@...helsinki.fi>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	Martin Peschke <mp3@...ibm.com>, Adrian Bunk <bunk@...sta.de>,
	Nick Piggin <nickpiggin@...oo.com.au>
Subject: Re: Linux 2.6.20-rc7

On Wed, 31 Jan 2007 16:19:06 -0800 (PST)
Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> I should either revert that commit or just check for "free_pages" being 
> negative. The latter, in many ways, is probably better, because generally 
> we simply should never work with negative numbers in the kernel, so when 
> something potentially goes negative, we're probably just better off always 
> testing it explicitly anyway.
> 
> Nick, Andrew, any preferences? 

It would be cleaner to check for negativity, but note that we keep
subtracting stuff from free_pages in the later loop, so we'd need to check
there as well.

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