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

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Message-Id: <20070427215634.325606a9.akpm@linux-foundation.org>
Date:	Fri, 27 Apr 2007 21:56:34 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	David Chinner <dgc@....com>
Cc:	Christoph Lameter <clameter@....com>, 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>,
	Nick Piggin <nickpiggin@...oo.com.au>
Subject: Re: [00/17] Large Blocksize Support V3

On Sat, 28 Apr 2007 13:17:40 +1000 David Chinner <dgc@....com> wrote:

> > Fix up your lameo HBA for reads.
> 
> Where did that come from? You spend 20 lines described the inefficiencies
> of the readahead in the page cache and it should be fixed but then you
> turn around and say fix the HBA? 

My (repeated) point is that if we populate pagecache with physically-contiguous 4k
pages in this manner then bio+block will be able to create much larger SG lists.
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