From: Ohad Ben-Cohen <ohad@wizery.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Linux-pm mailing list <linux-pm@lists.linux-foundation.org>,
linux-mmc@vger.kernel.org, Ido Yariv <ido@wizery.com>
Subject: Re: subtle pm_runtime_put_sync race and sdio functions
Date: Sun, 19 Dec 2010 12:00:06 +0200 [thread overview]
Message-ID: <AANLkTi=AnsLbL4vfNC++CxVdP5hDMCxifXcQthYExQbH__16243.5068087236$1292752909$gmane$org@mail.gmail.com> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1012181547580.7965-100000@netrider.rowland.org>
On Sat, Dec 18, 2010 at 11:20 PM, Alan Stern <stern@rowland.harvard.edu> wrote:
>> They would also gain deterministic and controllable behavior that we
>> can't guarantee when we rely on a context switch, because obviously
>> the latter yields different results for different platforms and
>> workloads (for the exact same subsystem).
>
> Like I said before, it's a trade-off. There are arguments for both
> sides, and which is better is unclear. Rafael has to make a judgment
> call.
This calls for power measurements and analysis which may demonstrate
whether such a change is beneficial or not (and if yes, how much, and
under which workloads/setups).
Sadly I don't have the equipment to perform those measurements, which
I think are imperative to justify such a patch: IMHO the commit log
must include numbers...
Again, Rafael and Alan, thanks for your time and attention.
Ohad.
next prev parent reply other threads:[~2010-12-19 10:00 UTC|newest]
Thread overview: 180+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-09 23:37 subtle pm_runtime_put_sync race and sdio functions Ohad Ben-Cohen
2010-12-10 0:00 ` Rafael J. Wysocki
2010-12-10 0:00 ` [linux-pm] " Rafael J. Wysocki
2010-12-10 17:24 ` Alan Stern
2010-12-10 17:24 ` [linux-pm] " Alan Stern
2010-12-10 22:01 ` Rafael J. Wysocki
2010-12-10 22:01 ` [linux-pm] " Rafael J. Wysocki
2010-12-10 23:02 ` Ohad Ben-Cohen
2010-12-10 23:02 ` [linux-pm] " Ohad Ben-Cohen
2010-12-10 22:59 ` Ohad Ben-Cohen
2010-12-10 22:59 ` [linux-pm] " Ohad Ben-Cohen
2010-12-11 1:17 ` Ohad Ben-Cohen
2010-12-11 14:53 ` Alan Stern
2010-12-11 1:17 ` Ohad Ben-Cohen
2010-12-11 14:50 ` Alan Stern
2010-12-18 13:29 ` Ohad Ben-Cohen
2010-12-18 13:29 ` [linux-pm] " Ohad Ben-Cohen
2010-12-18 14:16 ` David Vrabel
2010-12-18 15:12 ` Ohad Ben-Cohen
2010-12-18 15:12 ` Ohad Ben-Cohen
2010-12-18 14:16 ` David Vrabel
2010-12-18 15:07 ` [linux-pm] " Rafael J. Wysocki
2010-12-18 16:00 ` Ohad Ben-Cohen
2010-12-18 16:00 ` [linux-pm] " Ohad Ben-Cohen
2010-12-18 16:40 ` Johannes Berg
2010-12-18 19:08 ` Ohad Ben-Cohen
2010-12-18 19:08 ` Ohad Ben-Cohen
2010-12-18 21:30 ` Alan Stern
2010-12-18 21:30 ` Alan Stern
2010-12-18 22:57 ` Rafael J. Wysocki
2010-12-18 22:57 ` [linux-pm] " Rafael J. Wysocki
2010-12-18 21:30 ` Alan Stern
2010-12-18 22:52 ` Rafael J. Wysocki
2010-12-18 22:52 ` [linux-pm] " Rafael J. Wysocki
2010-12-18 19:08 ` Ohad Ben-Cohen
2010-12-18 21:29 ` [linux-pm] " Alan Stern
2010-12-18 21:29 ` Alan Stern
2010-12-18 21:29 ` Alan Stern
2010-12-18 22:50 ` Rafael J. Wysocki
2010-12-18 22:50 ` [linux-pm] " Rafael J. Wysocki
2010-12-18 16:40 ` Johannes Berg
2010-12-18 22:47 ` [linux-pm] " Rafael J. Wysocki
2010-12-18 22:47 ` Rafael J. Wysocki
2010-12-19 7:48 ` Ohad Ben-Cohen
2010-12-19 7:48 ` Ohad Ben-Cohen
2010-12-19 7:48 ` Ohad Ben-Cohen
2010-12-19 10:22 ` Rafael J. Wysocki
2010-12-19 10:22 ` [linux-pm] " Rafael J. Wysocki
2010-12-20 3:37 ` Alan Stern
2010-12-20 3:37 ` Alan Stern
2010-12-20 21:17 ` Rafael J. Wysocki
2010-12-21 0:57 ` Alan Stern
2010-12-21 0:57 ` Alan Stern
2010-12-21 21:31 ` Rafael J. Wysocki
2010-12-22 1:42 ` Alan Stern
2010-12-22 1:42 ` Alan Stern
2010-12-22 12:29 ` Rafael J. Wysocki
2010-12-22 12:29 ` Rafael J. Wysocki
2011-01-26 23:28 ` Kevin Hilman
2011-01-26 23:28 ` Kevin Hilman
2011-01-27 18:13 ` Alan Stern
2011-01-27 18:13 ` [linux-pm] " Alan Stern
2011-01-27 18:13 ` Alan Stern
2011-01-27 19:22 ` Kevin Hilman
2011-01-27 19:22 ` [linux-pm] " Kevin Hilman
2011-01-27 19:22 ` Kevin Hilman
2011-01-27 19:49 ` Alan Stern
2011-01-27 19:49 ` [linux-pm] " Alan Stern
2011-01-27 19:49 ` Alan Stern
2011-01-27 20:15 ` Kevin Hilman
2011-01-27 20:15 ` [linux-pm] " Kevin Hilman
2011-01-27 20:15 ` Kevin Hilman
2011-01-27 22:18 ` Vitaly Wool
2011-01-27 22:18 ` Vitaly Wool
2011-01-27 22:18 ` Vitaly Wool
2011-01-27 23:21 ` Rafael J. Wysocki
2011-01-27 23:21 ` [linux-pm] " Rafael J. Wysocki
2011-01-27 23:49 ` Kevin Hilman
2011-01-27 23:49 ` [linux-pm] " Kevin Hilman
2011-01-27 23:11 ` Rafael J. Wysocki
2011-01-27 23:11 ` [linux-pm] " Rafael J. Wysocki
2011-01-27 18:20 ` Vitaly Wool
2011-01-27 18:20 ` [linux-pm] " Vitaly Wool
2011-01-27 18:20 ` Vitaly Wool
2011-01-27 18:54 ` Kevin Hilman
2011-01-27 18:54 ` [linux-pm] " Kevin Hilman
2010-12-22 12:29 ` Rafael J. Wysocki
2010-12-22 1:42 ` Alan Stern
2010-12-21 21:31 ` Rafael J. Wysocki
2010-12-21 0:57 ` Alan Stern
2010-12-20 21:17 ` Rafael J. Wysocki
2010-12-20 3:37 ` Alan Stern
2010-12-21 22:23 ` Kevin Hilman
2010-12-21 22:23 ` [linux-pm] " Kevin Hilman
2010-12-22 1:48 ` Alan Stern
2010-12-22 1:48 ` Alan Stern
2010-12-22 1:48 ` Alan Stern
2010-12-23 7:51 ` Ohad Ben-Cohen
2010-12-23 7:51 ` [linux-pm] " Ohad Ben-Cohen
2010-12-23 16:03 ` Alan Stern
2010-12-23 16:03 ` [linux-pm] " Alan Stern
2010-12-23 16:03 ` Alan Stern
2010-12-25 7:34 ` Ohad Ben-Cohen
2010-12-25 7:34 ` Ohad Ben-Cohen
2010-12-25 16:21 ` Alan Stern
2010-12-25 16:21 ` Alan Stern
2010-12-25 20:58 ` Ohad Ben-Cohen
2010-12-25 20:58 ` [linux-pm] " Ohad Ben-Cohen
2010-12-25 20:58 ` Ohad Ben-Cohen
2010-12-25 21:50 ` Vitaly Wool
2010-12-25 21:50 ` [linux-pm] " Vitaly Wool
2010-12-26 5:27 ` Ohad Ben-Cohen
2010-12-26 5:27 ` [linux-pm] " Ohad Ben-Cohen
2010-12-25 21:54 ` Vitaly Wool
2010-12-25 21:54 ` Vitaly Wool
2010-12-25 21:54 ` Vitaly Wool
2010-12-26 2:48 ` [linux-pm] " Alan Stern
2010-12-26 2:48 ` Alan Stern
2010-12-26 5:55 ` Ohad Ben-Cohen
2010-12-26 5:55 ` [linux-pm] " Ohad Ben-Cohen
2010-12-26 5:55 ` Ohad Ben-Cohen
2010-12-26 11:45 ` Rafael J. Wysocki
2010-12-26 12:43 ` Ohad Ben-Cohen
2010-12-26 12:43 ` [linux-pm] " Ohad Ben-Cohen
2010-12-26 12:43 ` Ohad Ben-Cohen
2010-12-26 18:35 ` Rafael J. Wysocki
2010-12-28 19:11 ` Ohad Ben-Cohen
2010-12-28 19:11 ` [linux-pm] " Ohad Ben-Cohen
2010-12-28 19:21 ` Rafael J. Wysocki
2010-12-28 19:21 ` [linux-pm] " Rafael J. Wysocki
2010-12-28 19:21 ` Rafael J. Wysocki
2010-12-28 19:34 ` Ohad Ben-Cohen
2010-12-28 20:36 ` Rafael J. Wysocki
2010-12-28 20:36 ` [linux-pm] " Rafael J. Wysocki
2010-12-28 19:34 ` Ohad Ben-Cohen
2010-12-26 18:35 ` Rafael J. Wysocki
2010-12-26 14:53 ` [linux-pm] " Ohad Ben-Cohen
2010-12-26 18:37 ` Rafael J. Wysocki
2010-12-26 18:37 ` [linux-pm] " Rafael J. Wysocki
2010-12-28 19:15 ` Ohad Ben-Cohen
2010-12-28 20:04 ` Rafael J. Wysocki
2010-12-28 20:04 ` [linux-pm] " Rafael J. Wysocki
2010-12-28 20:04 ` Rafael J. Wysocki
2010-12-28 20:41 ` Ohad Ben-Cohen
2010-12-28 20:41 ` [linux-pm] " Ohad Ben-Cohen
2010-12-28 20:41 ` Ohad Ben-Cohen
2010-12-28 19:15 ` Ohad Ben-Cohen
2010-12-26 14:53 ` Ohad Ben-Cohen
2010-12-26 11:45 ` Rafael J. Wysocki
2010-12-26 17:00 ` [linux-pm] " Alan Stern
2010-12-26 17:00 ` Alan Stern
2010-12-28 19:04 ` Ohad Ben-Cohen
2010-12-28 19:04 ` [linux-pm] " Ohad Ben-Cohen
2010-12-28 19:04 ` Ohad Ben-Cohen
2010-12-28 21:46 ` Alan Stern
2010-12-28 21:46 ` [linux-pm] " Alan Stern
2010-12-28 21:46 ` Alan Stern
2010-12-29 6:34 ` Ohad Ben-Cohen
2010-12-30 4:25 ` Alan Stern
2010-12-30 4:25 ` Alan Stern
2010-12-30 4:25 ` Alan Stern
2010-12-29 6:34 ` Ohad Ben-Cohen
2010-12-29 8:01 ` Ohad Ben-Cohen
2010-12-29 8:01 ` [linux-pm] " Ohad Ben-Cohen
2010-12-30 4:30 ` Alan Stern
2010-12-30 4:30 ` [linux-pm] " Alan Stern
2010-12-30 4:30 ` Alan Stern
2010-12-26 17:00 ` Alan Stern
2010-12-26 2:48 ` Alan Stern
2010-12-25 16:21 ` Alan Stern
2010-12-25 7:34 ` Ohad Ben-Cohen
2010-12-18 22:47 ` Rafael J. Wysocki
2010-12-18 15:07 ` Rafael J. Wysocki
2010-12-18 21:20 ` [linux-pm] " Alan Stern
2010-12-18 23:03 ` Rafael J. Wysocki
2010-12-18 23:03 ` Rafael J. Wysocki
2010-12-19 10:00 ` [linux-pm] " Ohad Ben-Cohen
2010-12-19 10:00 ` Ohad Ben-Cohen [this message]
2010-12-18 21:20 ` Alan Stern
2010-12-09 23:37 Ohad Ben-Cohen
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