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From: david@lang.hm
To: Valdis.Kletnieks@vt.edu
Cc: Oliver Neukum <oneukum@suse.de>,
	"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: Mon, 30 May 2011 11:03:10 -0700 (PDT)	[thread overview]
Message-ID: <alpine.DEB.2.02.1105301102110.5766@asgard.lang.hm> (raw)
In-Reply-To: <148710.1306760150@turing-police.cc.vt.edu>

On Mon, 30 May 2011, Valdis.Kletnieks@vt.edu wrote:

> On Mon, 30 May 2011 09:13:27 +0200, Oliver Neukum said:
>> Am Montag, 30. Mai 2011, 03:53:18 schrieb david@lang.hm:
>
>>> if what you are wanting is the ability to say 'these things must be
>>> written before these other things to keep them from being corrupted, but I
>>> don't care when they get written (or if they get lost in a crash)' then
>>> what you want isn't fsync, it's a barrier.
>>
>> Yes, but where is the problem?
>
> The problem is that *from userspace*, the closest approximation to a barrier
> is fsync().

good point, there really should be some way of doing a barrier from 
userspace.

David Lang

  reply	other threads:[~2011-05-30 18:03 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 [this message]
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
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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