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Date: Fri, 07 Jan 2011 06:15:15 -0800
From: Phil Karn <karn@ka9q.net>
MIME-Version: 1.0
Subject: Re: TRIM details
References: <4D2686ED.7000304@philkarn.net> <20110107091120.GA6634@citd.de>
	<20110107091720.GA6921@citd.de>
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To: Matthias Schniedermeyer <ms@citd.de>
Cc: xfs@oss.sgi.com

On 1/7/11 1:17 AM, Matthias Schniedermeyer wrote:

> Altough, after thinking about it a little more. Doing a Population count 
> in the controller while the data comes in over the wire can't be that 
> expensive.

Doesn't even have to be a popcount. Just OR every word into a register
as the data flies by and look to see if the result is 0.

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