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Date: Sun, 25 Sep 2011 20:51:07 -0400
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: Directory fsync
Message-ID: <20110926005107.GA12341@infradead.org>
References: <CAF7KpS8h2KDsLVzwAj=5ig-yuuiCwjQSVk0Nfy9UJ0qiyAqeCQ@mail.gmail.com>
	<20110923163354.GA24319@infradead.org> <201109240109.45532@zmi.at>
	<20110926002811.GA3159@dastard>
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To: Dave Chinner <david@fromorbit.com>
Cc: Michael Monnerie <michael.monnerie@is.it-management.at>, Christoph Hellwig <hch@infradead.org>, Zhu Han <schumi.han@gmail.com>, xfs@oss.sgi.com

On Mon, Sep 26, 2011 at 10:28:11AM +1000, Dave Chinner wrote:
> All it means is that the directory fsync() is a no-op that only
> costs CPU time.

Currently it also causes a superflous cache flush, but I have a patch
in my QA queue to fix that and reduce the (already tiny) CPU overhead a
bit more.

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