linux-kernel - Re: [PATCH -mm v2 01/11] mm: track free size between VMAs in VMA rbtree

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Message-ID: <1340699831.21991.34.camel@twins>
Date:	Tue, 26 Jun 2012 10:37:11 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Rik van Riel <riel@...hat.com>
Cc:	Rik van Riel <riel@...riel.com>, linux-mm@...ck.org,
	akpm@...ux-foundation.org, aarcange@...hat.com, minchan@...il.com,
	kosaki.motohiro@...il.com, andi@...stfloor.org, hannes@...xchg.org,
	mel@....ul.ie, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -mm v2 01/11] mm: track free size between VMAs in VMA
 rbtree

On Mon, 2012-06-25 at 17:52 -0400, Rik van Riel wrote:
> > The thing you propose, the double search, once for len, and once for len
> > +align-1 doesn't guarantee you'll find a hole. All holes of len might be
> > mis-aligned but the len+align-1 search might overlook a hole of suitable
> > size and alignment, you'd have to search the entire range: [len, len
> > +align-1], and that's somewhat silly.
> 
> This may still be good enough. 

OK, as long as this is clearly mentioned in a comment near there.

It just annoys me that I cannot come up with anything better :-)
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