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Date: Thu, 26 Apr 2007 17:07:27 +1000
From: Nick Piggin <nickpiggin@yahoo.com.au>
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To: David Chinner <dgc@sgi.com>
CC: Christoph Lameter <clameter@sgi.com>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       linux-kernel@vger.kernel.org, Mel Gorman <mel@skynet.ie>,
       William Lee Irwin III <wli@holomorphy.com>,
       Jens Axboe <jens.axboe@oracle.com>,
       Badari Pulavarty <pbadari@gmail.com>,
       Maxim Levitsky <maximlevitsky@gmail.com>
Subject: Re: [00/17] Large Blocksize Support V3
References: <20070424222105.883597089@sgi.com> <m1hcr3oi0m.fsf@ebiederm.dsl.xmission.com> <46303A98.9000605@yahoo.com.au> <Pine.LNX.4.64.0704252337390.30340@schroedinger.engr.sgi.com> <46304C74.9040304@yahoo.com.au> <20070426070454.GF32602149@melbourne.sgi.com>
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David Chinner wrote:
> On Thu, Apr 26, 2007 at 04:53:40PM +1000, Nick Piggin wrote:
> 
>>Christoph Lameter wrote:
>>
>>>On Thu, 26 Apr 2007, Nick Piggin wrote:
>>>
>>>>I am working now and again on some code to do this, it is a big job but
>>>>I think it is the right way to do it. But it would take a long time to
>>>>get stable and supported by filesystems...
>>>
>>>Ummm... We already have a radix tree for this???? What more is needed? You 
>>>just need to go through all filesystems and make them use extends.
>>
>>I'm talking about block size > page size in the buffer layer.
> 
> 
> Nick, what's the buffer layer? Are you talking about operations
> based on bufferheads?

Yeah. Our pgoff_t->sector_t translation.

-- 
SUSE Labs, Novell Inc.