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Date: Sun, 29 Apr 2007 22:23:25 -0700 (PDT)
From: Christoph Lameter <clameter@sgi.com>
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To: Maxim Levitsky <maximlevitsky@gmail.com>
cc: linux-kernel@vger.kernel.org, Mel Gorman <mel@skynet.ie>,
       William Lee Irwin III <wli@holomorphy.com>, David Chinner <dgc@sgi.com>,
       Jens Axboe <jens.axboe@oracle.com>,
       Badari Pulavarty <pbadari@gmail.com>
Subject: Re: [00/17] Large Blocksize Support V3
In-Reply-To: <200704281939.28868.maximlevitsky@gmail.com>
Message-ID: <Pine.LNX.4.64.0704292221480.1978@schroedinger.engr.sgi.com>
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On Sat, 28 Apr 2007, Maxim Levitsky wrote:

> 1) Is it possible for block device to assume that it will alway get big 
> requests (and aligned by big blocksize) ?

That is one of the key problems. We hope that Mel Gorman's antifrag work 
will get us there.
 
> 2) Does metadata reading/writing occuress also using same big blocksize ?

It can if the filesystem decides to and sets up the order the mapping.
 
> 3 If so, How __bread/__getblk are affrected? Does returned buffer_head point 
> to whole block ?

Correct.