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

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Message-ID: <20070902152801.GA19962@infradead.org>
Date:	Sun, 2 Sep 2007 16:28:01 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Christoph Lameter <clameter@....com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	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, Sep 02, 2007 at 04:40:21AM -0700, Christoph Lameter wrote:
> On Sat, 1 Sep 2007, Christoph Hellwig wrote:
> 
> > On Fri, Aug 31, 2007 at 05:12:18PM -0700, Mingming Cao wrote:
> > > >From clameter:
> > > Teach jbd/jbd2 slab management to support >8k block size. Without this, it refused to mount on >8k ext3.
> > 
> > 
> > But the real fix is to kill this code.  We can't send down slab pages
> > down the block layer without breaking iscsi or aoe.  And this code is
> > only used in so rare cases that all the normal testing won't hit it.
> > Very bad combination.
> 
> We are doing what you describe right now. So the current code is broken?

Yes.
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