linux-kernel - Re: [00/17] Large Blocksize Support V3

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Date:	Thu, 26 Apr 2007 11:07:33 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
cc:	David Chinner <dgc@....com>, Nick Piggin <nickpiggin@...oo.com.au>,
	linux-kernel@...r.kernel.org, Mel Gorman <mel@...net.ie>,
	William Lee Irwin III <wli@...omorphy.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Badari Pulavarty <pbadari@...il.com>,
	Maxim Levitsky <maximlevitsky@...il.com>
Subject: Re: [00/17] Large Blocksize Support V3

On Thu, 26 Apr 2007, Eric W. Biederman wrote:

> Ok.  Now why are high end hardware manufacturers building crippled
> hardware?  Or is there only an 8bit field in SCSI for describing
> scatter gather entries?  Although I would think this would be
> move of a controller ranter than a drive issue.

They do not share your definition of "crippled" and would rather 
say that Linux is crippled OS because it cannot support large physical 
block size I/O.

> The change the fundamental fragmentation avoidance algorithm of the
> OS.  Use only one size of page.  That is a huge problem.

No its no problem at all. Its in some peoples head that have never seen it 
done otherwise. We have another OS here that has dealt with variable sized 
pages for ages and our people have been shaking their heads for years 
about these strong opinious that lead us not dealing with the 
problem.


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