linux-kernel - Re: [PATCH] Fixed a mismatch between the users of radix

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Message-ID: <1281987236.1926.1895.camel@laptop>
Date:	Mon, 16 Aug 2010 21:33:56 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Salman Qazi <sqazi@...gle.com>
Cc:	paulmck@...ibm.com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, adurbin@...gle.com
Subject: Re: [PATCH] Fixed a mismatch between the users of radix_tree and
 the implementation.

On Mon, 2010-08-16 at 11:30 -0700, Salman Qazi wrote:
> For the delete case,
> we no longer shrink the tree back to being just the root containing the
> only remaining object.  For the insert case, we no longer store the
> first object in the root, rather allocating a node structure for it.  The
> reason that this works is that deleting (or inserting) intermediate nodes
> does not make a difference to a reader holding a slot.  

Ah, I through that was what it did. So you basically increase the memory
footprint for tiny files.. have you done any measurements on that?
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