netdev - Re: [PATCH v2] Speed-up pfifo_fast lookup using a private bitmap

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Date:	Sat, 29 Aug 2009 00:19:41 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	krkumar2@...ibm.com
Cc:	jarkao2@...il.com, netdev@...r.kernel.org,
	herbert@...dor.apana.org.au, kaber@...sh.net
Subject: Re: [PATCH v2] Speed-up pfifo_fast lookup using a private bitmap

From: Krishna Kumar <krkumar2@...ibm.com>
Date: Wed, 19 Aug 2009 13:25:59 +0530

> From: Krishna Kumar <krkumar2@...ibm.com>
> 
> Maintain a per-qdisc bitmap for pfifo_fast giving  availability
> of skbs for each band. This allows faster lookup for a skb when
> there are no high priority skbs. Also, it helps in (rare) cases
> when there are no skbs on the list, where an immediate lookup is
> faster than iterating through the three bands.
> 
> Changelog v1 -> v2
> 
> 1. Moved the bitmap from Qdisc to the private area of pfifo_fast
> 2. pfifo_fast_reset sets bitmap to zero
> 3. Undo a line-wrap in initializing a variable
> 4. Fixed some comments
> 5. Readability and checkpatch fixes
> 
> Thanks,
> 
> - KK
> 
> Signed-off-by: Krishna Kumar <krkumar2@...ibm.com>

Applied, thanks.
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