linux-kernel - Re: [PATCH] Fix array overflow in CFQ

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Message-ID: <20101021171600.GA6277@gargoyle.fritz.box>
Date:	Thu, 21 Oct 2010 19:16:00 +0200
From:	Andi Kleen <ak@...ux.intel.com>
To:	Jeff Moyer <jmoyer@...hat.com>
Cc:	Vivek Goyal <vgoyal@...hat.com>, Jens Axboe <axboe@...nel.dk>,
	Andi Kleen <andi@...stfloor.org>,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix array overflow in CFQ

> > Agreed.
> >
> > Jens, do you want me to regenerate your patch so that we increase the
> > size of ->busy_queues_avg[CFQ_PRIO_NR] but not ->service_trees[][].
> 
> Just be sure to put a huge comment in there so you don't confuse the
> poor masses trying to make sense of the code.

Right now the code is confusing, with a correctly sized array it would
be completely straight forward.

-Andi
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