linux-kernel - Re: [RFC] ext4: Don't send extra barrier during fsync if there are no dirty pages.

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Message-ID: <4C5818A1.9070102@redhat.com>
Date:	Tue, 03 Aug 2010 16:24:49 +0300
From:	Avi Kivity <avi@...hat.com>
To:	tytso@....edu, Christoph Hellwig <hch@...radead.org>,
	Ric Wheeler <rwheeler@...hat.com>,
	Mingming Cao <cmm@...ibm.com>, djwong@...ibm.com,
	linux-ext4 <linux-ext4@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Keith Mannthey <kmannth@...ibm.com>,
	Mingming Cao <mcao@...ibm.com>
Subject: Re: [RFC] ext4: Don't send extra barrier during fsync if there are
 no dirty pages.

  On 06/30/2010 03:48 PM, tytso@....edu wrote:
>
> I wonder if it's worthwhile to think about a new system call which
> allows users to provide an array of fd's which are collectively should
> be fsync'ed out at the same time.  Otherwise, we end up issuing
> multiple barrier operations in cases where the application needs to
> do:
>
> 	fsync(control_fd);
> 	fsync(data_fd);
>

The system call exists, it's called io_submit().

-- 
error compiling committee.c: too many arguments to function

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