From: Jeremy Maitin-Shepard <jbms@cmu.edu>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: david@lang.hm, LKML <linux-kernel@vger.kernel.org>,
Milton Miller <miltonm@bga.com>,
Ying Huang <ying.huang@intel.com>,
linux-pm <linux-pm@lists.linux-foundation.org>
Subject: Re: Re: Hibernation considerations
Date: Fri, 20 Jul 2007 18:48:24 -0400 [thread overview]
Message-ID: <87zm1qofnr.fsf@jbms.ath.cx> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0707201830470.5241-100000@iolanthe.rowland.org> (Alan Stern's message of "Fri\, 20 Jul 2007 18\:35\:16 -0400 \(EDT\)")
Alan Stern <stern@rowland.harvard.edu> writes:
> On Fri, 20 Jul 2007, Jeremy Maitin-Shepard wrote:
>> >> when doing a suspend-to-ram you get to a point where you just don't use
>> >> any userspace.
>>
>> > What do you mean? How can you prevent user tasks from running? That's
>> > basically what the freezer does, and the whole point of this approach
>> > is to eliminate the freezer. Right?
>>
>> Presumably no tasks at all would be scheduled.
> How would you prevent tasks from being scheduled? How would you
> prevent drivers from deadlocking because in order to put their device
> in a low-power state they need to acquire a lock which is held by a
> user task?
Perhaps this isn't an issue once the device is already quiesced. I'm
just conjecturing.
[snip]
--
Jeremy Maitin-Shepard
next prev parent reply other threads:[~2007-07-20 22:48 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <877ioupxi8.fsf@jbms.ath.cx>
2007-07-20 22:35 ` Re: Hibernation considerations Alan Stern
2007-07-20 22:43 ` david
2007-07-20 22:48 ` Jeremy Maitin-Shepard [this message]
[not found] ` <Pine.LNX.4.64.0707201540260.5166@asgard.lang.hm>
2007-07-21 5:21 ` Nigel Cunningham
2007-07-21 14:10 ` Alan Stern
[not found] <9D7649D18729DE4BB2BD7B494F7FEDC236CF5C@pdsmsx415.ccr.corp.intel.com>
2007-07-24 14:50 ` Alan Stern
[not found] <Pine.LNX.4.44L0.0707231120380.3545-100000@iolanthe.rowland.org>
2007-07-23 21:55 ` Nigel Cunningham
[not found] ` <200707240755.01820.nigel@nigel.suspend2.net>
2007-07-23 22:10 ` Rafael J. Wysocki
[not found] <Pine.LNX.4.64.0707231121220.3828@asgard.lang.hm>
2007-07-23 20:22 ` Alan Stern
2007-07-24 13:26 ` Huang, Ying
[not found] <Pine.LNX.4.44L0.0707231035150.3545-100000@iolanthe.rowland.org>
2007-07-23 19:01 ` david
[not found] <200707231311.56398.nigel@nigel.suspend2.net>
2007-07-23 15:23 ` Alan Stern
[not found] <Pine.LNX.4.44L0.0707221608140.16031-100000@netrider.rowland.org>
2007-07-22 21:54 ` david
[not found] <Pine.LNX.4.44L0.0707221116060.15224-100000@netrider.rowland.org>
2007-07-22 16:27 ` Miklos Szeredi
2007-07-22 20:09 ` Alan Stern
2007-07-22 22:42 ` Nigel Cunningham
[not found] ` <200707230842.22121.nigel@nigel.suspend2.net>
2007-07-22 23:09 ` Rafael J. Wysocki
[not found] ` <200707230109.23071.rjw@sisk.pl>
2007-07-22 23:18 ` Nigel Cunningham
2007-07-23 0:04 ` Paul Mackerras
[not found] ` <18083.61595.217126.824924@cargo.ozlabs.ibm.com>
2007-07-23 3:11 ` Nigel Cunningham
2007-07-23 5:31 ` david
2007-07-23 10:24 ` Miklos Szeredi
2007-07-23 12:08 ` Rafael J. Wysocki
2007-07-23 12:14 ` Miklos Szeredi
[not found] ` <E1ICwoE-0004q8-00@dorka.pomaz.szeredi.hu>
2007-07-23 12:27 ` Rafael J. Wysocki
2007-07-23 12:31 ` Oliver Neukum
[not found] ` <200707231431.30372.oliver@neukum.org>
2007-07-23 13:08 ` Miklos Szeredi
[not found] ` <200707231601.09541.rjw@sisk.pl>
2007-07-23 14:01 ` Miklos Szeredi
2007-07-23 14:01 ` Rafael J. Wysocki
2007-07-23 19:08 ` david
[not found] <Pine.LNX.4.64.0707212000380.6747@asgard.lang.hm>
2007-07-22 16:00 ` Alan Stern
2007-07-22 21:50 ` david
2007-07-23 15:19 ` Alan Stern
[not found] <Pine.LNX.4.44L0.0707210956320.8201-100000@netrider.rowland.org>
2007-07-22 3:43 ` david
[not found] <200707202335.05519.oliver@neukum.org>
2007-07-20 22:25 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.0707201820050.5241-100000@iolanthe.rowland.org>
2007-07-23 14:23 ` Oliver Neukum
2007-08-01 9:34 ` Pavel Machek
[not found] ` <20070801093437.GC4808@ucw.cz>
2007-08-03 3:50 ` david
[not found] <Pine.LNX.4.44L0.0707201608120.2546-100000@iolanthe.rowland.org>
2007-07-20 21:35 ` Oliver Neukum
[not found] <200707202203.27849.oliver@neukum.org>
2007-07-20 20:12 ` Alan Stern
[not found] <Pine.LNX.4.44L0.0707201408060.2546-100000@iolanthe.rowland.org>
2007-07-20 19:08 ` Milton Miller
2007-07-20 20:03 ` Oliver Neukum
[not found] <fe998950b9d5ad317d5c1f5ff4e21ac9@bga.com>
2007-07-20 19:37 ` Alan Stern
[not found] <f29402c6050f9c3ff5d83a59cea2de58%40bga.com>
2007-07-20 19:09 ` Milton Miller
2007-07-20 20:23 ` Jeremy Maitin-Shepard
2007-07-17 20:27 david
[not found] ` <Pine.LNX.4.44L0.0707171416120.3728-100000@iolanthe.rowland.org>
[not found] ` <200707172217.01890.rjw@sisk.pl>
[not found] ` <87odiag45q.fsf@jbms.ath.cx>
[not found] ` <200707151433.34625.rjw@sisk.pl>
[not found] ` <200707172320.16279.rjw@sisk.pl>
2007-07-20 14:01 ` Milton Miller
2007-07-20 14:48 ` Huang, Ying
2007-07-20 15:48 ` david
2007-07-22 2:17 ` Huang, Ying
[not found] ` <1185070634.3517.11.camel@caritas-dev.intel.com>
2007-07-22 2:32 ` david
2007-07-20 21:34 ` Rafael J. Wysocki
[not found] ` <ea7a437ca4038d408ac544bbc3c2434a@bga.com>
[not found] ` <200707192228.05136.rjw@sisk.pl>
2007-07-20 16:08 ` Milton Miller
2007-07-20 16:20 ` Alan Stern
2007-07-20 17:32 ` Milton Miller
2007-07-20 18:17 ` Alan Stern
2007-07-20 20:31 ` david
2007-07-20 21:24 ` Alan Stern
2007-07-20 21:34 ` david
2007-07-20 21:37 ` Jeremy Maitin-Shepard
[not found] ` <Pine.LNX.4.64.0707201428080.5166@asgard.lang.hm>
2007-07-20 22:15 ` Rafael J. Wysocki
2007-07-20 21:02 ` Rafael J. Wysocki
2007-07-21 11:44 ` Miklos Szeredi
[not found] ` <E1ICDNw-0008HC-00@dorka.pomaz.szeredi.hu>
2007-07-21 12:43 ` Nigel Cunningham
[not found] ` <200707212243.35602.nigel@nigel.suspend2.net>
2007-07-21 13:56 ` Alan Stern
2007-07-21 16:13 ` Jeremy Maitin-Shepard
[not found] ` <87lkd9ohtn.fsf@jbms.ath.cx>
2007-07-21 18:12 ` Miklos Szeredi
2007-07-21 19:20 ` Rafael J. Wysocki
2007-07-21 22:21 ` Nigel Cunningham
[not found] ` <200707212120.04645.rjw@sisk.pl>
2007-08-01 9:22 ` Pavel Machek
[not found] ` <20070801092227.GB4808@ucw.cz>
2007-08-02 17:02 ` Rafael J. Wysocki
2007-08-02 17:02 ` Rafael J. Wysocki
2007-07-21 22:16 ` Nigel Cunningham
2007-07-22 15:26 ` Alan Stern
2007-08-01 9:19 ` Pavel Machek
[not found] ` <Pine.LNX.4.64.0707191542430.28721@asgard.lang.hm>
[not found] ` <200707201317.58025.rjw@sisk.pl>
2007-07-20 16:56 ` Milton Miller
[not found] ` <f29402c6050f9c3ff5d83a59cea2de58@bga.com>
2007-07-20 17:31 ` Jeremy Maitin-Shepard
2007-07-20 21:30 ` Rafael J. Wysocki
2007-07-20 19:26 ` david
2007-07-20 21:28 ` Rafael J. Wysocki
2007-07-20 21:33 ` Jeremy Maitin-Shepard
[not found] ` <87ejj2pxoc.fsf@jbms.ath.cx>
2007-07-20 22:19 ` Rafael J. Wysocki
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