linux-kernel - Re: readahead on directories

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Message-ID: <20100421200243.GU27575@shareable.org>
Date:	Wed, 21 Apr 2010 21:02:43 +0100
From:	Jamie Lokier <jamie@...reable.org>
To:	Evgeniy Polyakov <zbr@...emap.net>
Cc:	Phillip Susi <psusi@....rr.com>, linux-fsdevel@...r.kernel.org,
	Linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: readahead on directories

Evgeniy Polyakov wrote:
> > But if it does, go on, try FIEMAP and blockdev reading, you know you
> > want to :-)
> 
> Well, it requires substantial underlying fs knowledge and is not simple
> and, well, appropriate to do in some cases.

FIEMAP might not be the answer, but what part of it requires fs
knowledge?  It's supposed to be fs-independent.  I agree it's not
always appropriate to use, and I don't know if it would be effective
anyway.

-- Jamie
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