linux-kernel - Re: [00/41] Large Blocksize Support V7 (adds memmap support)

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Date:	Tue, 18 Sep 2007 21:33:32 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Rene Herman <rene.herman@...il.com>
cc:	Andrea Arcangeli <andrea@...e.de>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Christoph Lameter <clameter@....com>,
	Mel Gorman <mel@...net.ie>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>,
	William Lee Irwin III <wli@...omorphy.com>,
	David Chinner <dgc@....com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Badari Pulavarty <pbadari@...il.com>,
	Maxim Levitsky <maximlevitsky@...il.com>,
	Fengguang Wu <fengguang.wu@...il.com>,
	swin wang <wangswin@...il.com>, totty.lu@...il.com,
	hugh@...itas.com, joern@...ybastard.org
Subject: Re: [00/41] Large Blocksize Support V7 (adds memmap support)



On Wed, 19 Sep 2007, Rene Herman wrote:
> 
> I do feel larger blocksizes continue to make sense in general though. Packet
> writing on CD/DVD is a problem already today since the hardware needs 32K or
> 64K blocks and I'd expect to see more of these and similiar situations when
> flash gets (even) more popular which it sort of inevitably is going to be.

.. that's what scatter-gather exists for.

What's so hard with just realizing that physical memory isn't contiguous?

It's why we have MMU's. It's why we have scatter-gather. 

		Linus
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