From mboxrd@z Thu Jan  1 00:00:00 1970
From: Oliver Neukum <oneukum@suse.com>
Subject: Re: [PATCH 1/1] suspend: delete sys_sync()
Date: Tue, 07 Jul 2015 15:16:48 +0200
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To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Dave Chinner <david@fromorbit.com>, Len Brown <lenb@kernel.org>, Henrique de Moraes Holschuh <hmh@hmh.eng.br>, Alan Stern <stern@rowland.harvard.edu>, One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>, Linux PM list <linux-pm@vger.kernel.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Len Brown <len.brown@intel.com>

On Tue, 2015-07-07 at 14:14 +0200, Rafael J. Wysocki wrote:
> For example, on desktop systems I use user space syncs filesystems
> before
> writing to /sys/power/state, so the additional sys_sync() in the
> kernel doesn't
> seem to serve any purpose.

There is a race you cannot close in user space.

	Regards
		Oliver