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

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Date:	Wed, 12 Sep 2007 01:26:57 +0200
From:	Andrea Arcangeli <andrea@...e.de>
To:	Christoph Lameter <clameter@....com>
Cc:	Jörn Engel <joern@...fs.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	torvalds@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>,
	Mel Gorman <mel@...net.ie>,
	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
Subject: Re: [00/41] Large Blocksize Support V7 (adds memmap support)

On Tue, Sep 11, 2007 at 01:41:08PM -0700, Christoph Lameter wrote:
> The advantages of this approach over Andreas is basically that the 4k 
> filesystems still can be used as is. 4k is useful for binaries and for 

If you mean that with my approach you can't use a 4k filesystem as is,
that's not correct. I even run the (admittedly premature but
promising) benchmarks on my patch on a 4k blocksized
filesystem... Guess what, you can even still mount a 1k fs on a 2.6
kernel.

The main advantage I can see in your patch is that distributions won't
need to ship a 64k PAGE_SIZE kernel rpm (but your single rpm will be
slower).
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