linux-kernel - Re: [PATCH -v3] x86: do not free zero sized per cpu areas

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Message-ID: <4BA408EE.5000001@zytor.com>
Date:	Fri, 19 Mar 2010 16:29:50 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org,
	Ian Campbell <ian.campbell@...rix.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH -v3] x86: do not free zero sized per cpu areas

On 03/19/2010 04:24 PM, Yinghai Lu wrote:
> 
> confused, do you mean like this
> if (start < end), find_overlapped_early will stop the loop.
> 

No.

What I mean is that free_early_partial(), when start == end, is a
legitimate operation that doesn't free anything -- the range is zero
bytes long.  Just return.

When start > end, there is an explicit error we should warn about.

	-hpa
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