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

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Message-ID: <Pine.LNX.4.64.0709171458541.29993@schroedinger.engr.sgi.com>
Date:	Mon, 17 Sep 2007 15:00:42 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Nick Piggin <nickpiggin@...oo.com.au>
cc:	Mel Gorman <mel@...net.ie>,
	Goswin von Brederlow <brederlo@...ormatik.uni-tuebingen.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Joern Engel <joern@...fs.org>, andrea@...e.de,
	torvalds@...ux-foundation.org, 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
Subject: Re: [00/41] Large Blocksize Support V7 (adds memmap support)

On Sun, 16 Sep 2007, Nick Piggin wrote:

> I don't know how it would prevent fragmentation from building up
> anyway. It's commonly the case that potentially unmovable objects
> are allowed to fill up all of ram (dentries, inodes, etc).

Not in 2.6.23 with ZONE_MOVABLE. Unmovable objects are not allocated from 
ZONE_MOVABLE and thus the memory that can be allocated for them is 
limited.



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