netdev - Re: [PATCH] net: gen_estimator: Fix gen_kill

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Date:	Mon, 24 Nov 2008 08:18:45 -0500
From:	jamal <j.hadi123@...il.com>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	David Miller <davem@...emloft.net>,
	Badalian Vyacheslav <slavon@...telecom.ru>,
	Denys Fedoryshchenko <denys@...p.net.lb>,
	jamal <hadi@...erus.ca>, netdev@...r.kernel.org
Subject: Re: [PATCH] net: gen_estimator: Fix gen_kill_estimator() lookups

On Mon, 2008-11-24 at 12:04 +0000, Jarek Poplawski wrote:
> gen_kill_estimator() linear lists lookups are very slow, and e.g. while
> deleting a large number of HTB classes soft lockups were reported. Here
> is another try to fix this problem: this time internally, with rbtree,
> so similarly to Jamal's hashing idea IIRC. (Looking for next hits could
> be still optimized, but it's really fast as it is.)

Certainly a big improvement. Compared to hashing i suggested:
the deletion speed is probably equal or better than using a hash.
I think a hash would have performed better in the case of addition
than the rb tree; but you primarily concerned about deletion, so this
good.

Acked-by: Jamal Hadi Salim <hadi@...erus.ca>

cheers,
jamal

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