From: Oliver Neukum <oneukum@suse.de>
To: david@lang.hm
Cc: "D. Jansen" <d.g.jansen@googlemail.com>,
Theodore Tso <tytso@mit.edu>,
akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
Dave Chinner <david@fromorbit.com>,
njs@pobox.com, bart@samwel.tk
Subject: Re: [rfc] Ignore Fsync Calls in Laptop_Mode
Date: Tue, 31 May 2011 08:48:14 +0200 [thread overview]
Message-ID: <201105310848.15148.oneukum@suse.de> (raw)
In-Reply-To: <alpine.DEB.2.02.1105301142030.5766@asgard.lang.hm>
Am Montag, 30. Mai 2011, 20:45:42 schrieb david@lang.hm:
> > The big problem is that so far only fsync existed and lots of software
> > seemingly abuses it as an expensive write barrier. And it would really
> > be lovely to have the choice to stop that on an opt-in basis in laptop
> > mode.
>
> is the benifit of not spinning up the disk really worth the risk of
> loosing data?
That is a policy question.
> and should this really be a global across-the-board option?
Possibly not. However this is a secondary question.
> the problem is that most users don't know what their system is running, or
> what effect disaling fsync would have. those that do can probably use
> LD_PRELOAD to override fsync calls.
Not without a loss of ordering, as we have discussed.
Regards
Oliver
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next prev parent reply other threads:[~2011-05-31 6:46 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-19 13:34 [rfc] Ignore Fsync Calls in Laptop_Mode Dennis Jansen
2011-05-19 13:43 ` Alan Cox
[not found] ` <BANLkTikFRwPY_qOQpPmCmNUJbBUsGcuGUw@mail.gmail.com>
[not found] ` <20110519153928.40521b93@lxorguk.ukuu.org.uk>
2011-05-19 15:01 ` D. Jansen
2011-05-19 15:02 ` D. Jansen
2011-05-20 15:34 ` Valdis.Kletnieks
2011-05-20 3:39 ` Dave Chinner
2011-05-20 6:01 ` D. Jansen
2011-05-22 0:48 ` Dave Chinner
2011-05-23 8:12 ` Oliver Neukum
2011-05-23 13:05 ` D. Jansen
2011-05-25 0:00 ` Dave Chinner
2011-05-25 6:50 ` Oliver Neukum
2011-05-26 7:01 ` D. Jansen
2011-05-26 10:49 ` Theodore Tso
[not found] ` <BANLkTimNjt4=9v33Z9Nr12xa6GmyJ-Ue5A@mail.gmail.com>
2011-05-26 13:31 ` Ted Ts'o
2011-05-26 16:05 ` D. Jansen
2011-05-26 16:21 ` Ted Ts'o
2011-05-27 7:12 ` D. Jansen
2011-05-27 14:17 ` Theodore Tso
2011-05-27 17:51 ` david
2011-05-29 10:45 ` D. Jansen
2011-05-30 1:53 ` david
2011-05-30 7:13 ` Oliver Neukum
2011-05-30 12:55 ` Valdis.Kletnieks
2011-05-30 18:03 ` david
2011-05-30 13:55 ` D. Jansen
2011-05-30 18:02 ` david
2011-05-30 18:28 ` D. Jansen
2011-05-30 18:43 ` Valdis.Kletnieks
2011-05-30 19:54 ` D. Jansen
2011-05-30 18:45 ` david
2011-05-30 19:49 ` D. Jansen
2011-05-30 20:53 ` david
2011-05-30 21:24 ` D. Jansen
2011-05-30 22:41 ` david
2011-05-31 2:03 ` Ted Ts'o
2011-05-31 2:26 ` david
2011-05-31 13:47 ` D. Jansen
2011-05-31 18:23 ` david
2011-05-31 18:37 ` D. Jansen
2011-05-31 18:54 ` david
2011-05-31 19:04 ` D. Jansen
2011-06-02 7:42 ` D. Jansen
2011-05-31 8:22 ` Valdis.Kletnieks
2011-05-30 22:10 ` Jesper Juhl
2011-05-31 6:48 ` Oliver Neukum [this message]
2011-05-26 19:31 ` Matthew Garrett
2011-05-27 7:22 ` D. Jansen
2011-05-20 15:28 ` Valdis.Kletnieks
2011-05-20 16:40 ` D. Jansen
2011-05-20 22:03 ` torbenh
2011-05-21 8:23 ` D. Jansen
2011-05-23 8:22 ` Jesper Juhl
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