linux-ext4 - Re: [RFC 1/2] JBD: slab management support for large block(>8k)

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Message-ID: <Pine.LNX.4.64.0709030051370.31366@schroedinger.engr.sgi.com>
Date:	Mon, 3 Sep 2007 00:55:04 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Christoph Hellwig <hch@...radead.org>
cc:	Mingming Cao <cmm@...ibm.com>, linux-fsdevel@...r.kernel.org,
	adilger@...sterfs.com, sho@...s.nec.co.jp,
	ext4 development <linux-ext4@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC 1/2] JBD: slab management support for large block(>8k)

On Sun, 2 Sep 2007, Christoph Hellwig wrote:

> > We are doing what you describe right now. So the current code is broken?
> Yes.

How about getting rid of the slabs there and use kmalloc? Kmalloc in mm 
(and therfore hopefully 2.6.24) will convert kmallocs > PAGE_SIZE to page 
allocator calls. Not sure what to do about the 1k and 2k requests though.

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