From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jamie Lokier <jamie@shareable.org>
Subject: Re: [PATCH 1/5] [BLOCK] Add 'discard' request handling
Date: Sun, 10 Aug 2008 02:05:42 +0100
Message-ID: <20080810010541.GB20183@shareable.org>
References: <1218192731.12232.110.camel@pmac.infradead.org> <20080808110934.GO20055@kernel.dk> <20080808111829.GP20055@kernel.dk> <1218194997.12232.124.camel@pmac.infradead.org> <20080808114409.GR20055@kernel.dk> <1218197116.12232.135.camel@pmac.infradead.org> <20080808121302.GT20055@kernel.dk> <1218198768.12232.144.camel@pmac.infradead.org> <20080808123730.GU20055@kernel.dk> <1218199792.12232.154.camel@pmac.infradead.org>
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Cc: Jens Axboe <jens.axboe@oracle.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ric Wheeler <ricwheeler@gmail.com>,
	linux-fsdevel@vger.kernel.org, gilad@codefidence.com
To: David Woodhouse <dwmw2@infradead.org>
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David Woodhouse wrote:
> Can we get away with representing discards as 'writes without buffers'?

That seems like a very good idea.  They have the same requirements as
writes w.r.t. barriers and merges/discards.

I can imagine situations where a filesystem wants discards to work
with barrier requests in exactly the same way as writes.

-- Jamie