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Date:	Thu, 28 Apr 2011 23:59:45 +0100
From:	Alasdair G Kergon <agk@...hat.com>
To:	LVM general discussion and development <linux-lvm@...hat.com>,
	Mike Snitzer <snitzer@...hat.com>,
	Christoph Hellwig <hch@...radead.org>, dm-devel@...hat.com,
	linux-ext4@...r.kernel.org, DarkNovaNick@...il.com
Subject: Re: [linux-lvm] do not disable ext4 discards on first discard
	failure? [was: Re: dm snapshot: ignore discards issued to the
	snapshot-origin target]

On Thu, Apr 28, 2011 at 04:28:17PM -0500, Eric Sandeen wrote:
> I still think that concats of floppies, usb disks, and ssds should be rare, so I'm less concerned about that ;)

It's the 'undefined' cases that cause us the trouble though: we do have
to return something and I prefer to work with defined and documented
behaviour, rather than pretending something is 'undefined' or
'unimportant' and later finding people relied on its actual behaviour.

Alasdair

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