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Date:   Fri, 2 Mar 2018 10:05:46 +0100
From:   Pavel Machek <pavel@ucw.cz>
To:     Ganesh Mahendran <opensource.ganesh@gmail.com>
Cc:     rjw@rjwysocki.net, len.brown@intel.com, gregkh@linuxfoundation.org,
        linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] PM / wakeup: use seq_open() to show wakeup stats
Message-ID: <20180302090546.GB30267@amd>
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On Fri 2018-03-02 13:01:00, Ganesh Mahendran wrote:
> single_open() interface requires that the whole output must
> fit into a single buffer. This will lead to timeout when
> system memory is not in a good situation.
>=20
> This patch use seq_open() to show wakeup stats. This method
> need only one page, so timeout will not be observed.

Can the rcu_read_unlock be delayed arbitrarily by userland code?

Is that ok with RCU?
								Pavel
							=09
--=20
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo=
g.html

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