linux-kernel - Re: Does the kernel page the CFS's red-black tree nodes?

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Message-ID: <87r5k6ulso.fsf@basil.nowhere.org>
Date:	Thu, 17 Jun 2010 10:04:55 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Richard Yao <shiningarcanine@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Does the kernel page the CFS's red-black tree nodes?

Richard Yao <shiningarcanine@...il.com> writes:
>
> With that said, does the kernel page the CFS's red-black tree nodes to
> swap? If it does, it might be a good idea to reimplement the CFS'
> Red-Black trees in B-Trees, which would minimize slow-downs from
> vm-pressure and also have the additional benefit of minimizing cache
> misses caused by tree traversal.

The kernel does not swap itself, but yes in theory btrees might help to 
improve CPU cache locality.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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