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From: Pavel Machek <pavel@ucw.cz>
To: Dave Chinner <david@fromorbit.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
	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>
Subject: Re: [PATCH 1/1] suspend: delete sys_sync()
Date: Mon, 6 Jul 2015 13:11:05 +0200	[thread overview]
Message-ID: <20150706111105.GD381@amd> (raw)
In-Reply-To: <20150706000614.GB3902@dastard>

Hi!

> > Moreover, question is if we really need to carry out the sync on *every*
> > suspend even if it is not pointless overall.  That shouldn't really be
> > necessary if we suspend and resume often enough or if we resume only for
> > a while and then suspend again.  Maybe it should be rate limited somehow
> > at least?
> 
> If you suspend and resume frequently, then the cost of the sync
> shoul dbe negliable because the amount of data dirtied between
> resume/suspend shoul dbe negliable. hence my questions about where
> sync is spending too much time, and whether we've actually fixed
> those problems or not. If sync speed on clean filesystems is a
> problem then we need to fix sync, not work around it.

And yes, that's solution I'd really prefer over adding knobs to
suspend.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

  reply	other threads:[~2015-07-06 11:11 UTC|newest]

Thread overview: 77+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-08  7:08 [PATCH 1/1] suspend: delete sys_sync() Len Brown
2015-05-08 14:34 ` Alan Stern
2015-05-08 14:34   ` Alan Stern
2015-05-08 16:36   ` Len Brown
2015-05-08 19:13     ` One Thousand Gnomes
2015-05-08 19:32       ` Len Brown
2015-05-08 19:52         ` One Thousand Gnomes
2015-05-08 20:39           ` Rafael J. Wysocki
2015-05-08 20:30         ` Rafael J. Wysocki
2015-05-09 19:59           ` Alan Stern
2015-05-09 20:25             ` Henrique de Moraes Holschuh
2015-05-11 20:34               ` Len Brown
2015-05-12  6:11                 ` Oliver Neukum
2015-06-25 17:11                 ` Henrique de Moraes Holschuh
2015-06-30 20:04                   ` Len Brown
2015-07-01 12:21                     ` Henrique de Moraes Holschuh
2015-07-02  3:07                       ` Len Brown
2015-07-03  1:42                         ` Dave Chinner
2015-07-04  1:03                           ` Rafael J. Wysocki
2015-07-04  8:50                             ` Geert Uytterhoeven
2015-07-05 23:25                               ` Rafael J. Wysocki
2015-07-04 14:19                             ` Alan Stern
2015-07-05 23:28                               ` Rafael J. Wysocki
2015-07-06 11:06                                 ` Pavel Machek
2015-07-06 13:59                                   ` Rafael J. Wysocki
2015-07-07 10:25                                     ` Pavel Machek
2015-07-07 12:22                                       ` Rafael J. Wysocki
2015-07-06  0:06                             ` Dave Chinner
2015-07-06 11:11                               ` Pavel Machek [this message]
2015-07-06 13:52                               ` Rafael J. Wysocki
2015-07-07  1:17                                 ` Dave Chinner
2015-07-07 12:14                                   ` Rafael J. Wysocki
2015-07-07 13:16                                     ` Oliver Neukum
2015-07-07 14:32                                       ` Rafael J. Wysocki
2015-07-07 14:38                                         ` Oliver Neukum
2015-07-07 15:03                                           ` Alan Stern
2015-07-07 22:20                                             ` Rafael J. Wysocki
2015-07-08 11:20                                               ` Pavel Machek
2015-07-08 14:40                                                 ` Alan Stern
2015-07-08 22:04                                                   ` Rafael J. Wysocki
2015-07-07 22:11                                           ` Rafael J. Wysocki
2015-07-08  7:51                                             ` Oliver Neukum
2015-07-08 22:03                                               ` Rafael J. Wysocki
2015-07-09  7:32                                                 ` Oliver Neukum
2015-07-09 23:22                                                   ` Rafael J. Wysocki
2015-08-04 19:54                                                     ` Pavel Machek
2015-07-08 11:17                                         ` Pavel Machek
2015-07-07 13:42                                   ` Takashi Iwai
2015-07-06 10:15                             ` Ming Lei
2015-07-06 10:03           ` Pavel Machek
2015-05-11  1:44 ` Dave Chinner
2015-05-11 20:22   ` Len Brown
2015-05-12 22:34     ` Dave Chinner
2015-05-13 23:22   ` NeilBrown
2015-05-14 23:54     ` Dave Chinner
2015-05-15  0:34       ` Rafael J. Wysocki
2015-05-15  0:40         ` Ming Lei
2015-05-15  0:59           ` Rafael J. Wysocki
2015-05-15  5:13             ` Ming Lei
2015-05-15 10:35             ` One Thousand Gnomes
2015-05-18  1:57               ` NeilBrown
     [not found]                 ` <CAJvTdKn_0EZ0ZuqO2e4+ExD8kFWcy78fse4zHr3uFZODOroXEg@mail.gmail.com>
2015-06-19  1:09                   ` Dave Chinner
2015-06-19  2:35                     ` Len Brown
2015-06-19  4:31                       ` Dave Chinner
2015-06-19  6:34                         ` Len Brown
2015-06-19 23:07                           ` Dave Chinner
2015-06-19 23:07                             ` Dave Chinner
2015-06-20  5:26                             ` Len Brown
2015-06-20  5:26                               ` Len Brown
2015-05-15  1:04       ` NeilBrown
2015-05-15 14:20         ` Alan Stern
2015-05-15 14:20           ` Alan Stern
2015-05-15 14:32           ` Alan Stern
2015-05-15 14:32             ` Alan Stern
2015-05-15 14:19       ` Alan Stern
2015-05-15 14:19         ` Alan Stern
2015-07-06 10:07   ` Pavel Machek

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