From: Oleg Nesterov <oleg@redhat.com>
To: Tejun Heo <tj@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
"Arve Hjønnevåg" <arve@android.com>,
linux-pm@lists.linux-foundation.org,
linux-kernel@vger.kernel.org,
"Alan Stern" <stern@rowland.harvard.edu>,
"Len Brown" <len.brown@intel.com>, "Pavel Machek" <pavel@ucw.cz>,
"Randy Dunlap" <rdunlap@xenotime.net>,
"Jesse Barnes" <jbarnes@virtuousgeek.org>,
"Magnus Damm" <damm@igel.co.jp>,
"Nigel Cunningham" <nigel@tuxonice.net>,
"Cornelia Huck" <cornelia.huck@de.ibm.com>,
"Ming Lei" <tom.leiming@gmail.com>,
"Wu Fengguang" <fengguang.wu@intel.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Maxim Levitsky" <maximlevitsky@gmail.com>,
linux-doc@vger.kernel.org
Subject: Re: [PATCH 1/8] PM: Add suspend block api.
Date: Fri, 30 Apr 2010 19:26:18 +0200 [thread overview]
Message-ID: <20100430172618.GA9043@redhat.com> (raw)
In-Reply-To: <4BDA5B8B.50004@kernel.org>
On 04/30, Tejun Heo wrote:
>
> On 04/29/2010 11:16 PM, Rafael J. Wysocki wrote:
> >>> Also, we already have one PM workqueue. It is used for runtime PM, but I guess
> >>> it may be used just as well for the opportunistic suspend. It is freezable,
> >>> but would it hurt?
> >>
> > Freezable workqueues have to be singlethread or else there will be unfixable
> > races, so you can safely assume things will stay as they are in this respect.
>
> Rafael, can you elaborate a bit more on this? Just in case I missed
> something while doing cmwq as it currently doesn't have such limit.
Currently _cpu_down() can't flush and/or stop the frozen cwq->thread.
IIRC this is fixable, but needs the nasty complications. We should
thaw + stop the frozen cwq->thread, then move the pending works to
another CPU.
Oleg.
next prev parent reply other threads:[~2010-04-30 17:30 UTC|newest]
Thread overview: 259+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-28 4:31 [PATCH 0/9] Suspend block api (version 5) Arve Hjønnevåg
2010-04-28 4:31 ` [PATCH 1/8] PM: Add suspend block api Arve Hjønnevåg
2010-04-28 4:31 ` Arve Hjønnevåg
2010-04-28 4:31 ` [PATCH 2/8] PM: suspend_block: Add driver to access suspend blockers from user-space Arve Hjønnevåg
2010-04-28 4:31 ` Arve Hjønnevåg
2010-04-28 4:31 ` [PATCH 3/8] PM: suspend_block: Abort task freezing if a suspend_blocker is active Arve Hjønnevåg
2010-04-28 4:31 ` Arve Hjønnevåg
2010-04-28 4:31 ` [PATCH 4/8] PM: suspend_block: Add debugfs file Arve Hjønnevåg
2010-04-28 4:31 ` Arve Hjønnevåg
2010-04-28 4:31 ` [PATCH 5/8] PM: suspend_block: Add suspend_blocker stats Arve Hjønnevåg
2010-04-28 4:31 ` Arve Hjønnevåg
2010-04-28 4:31 ` [PATCH 6/8] PM: Add suspend blocking work Arve Hjønnevåg
2010-04-28 4:31 ` Arve Hjønnevåg
2010-04-28 4:31 ` [PATCH 7/8] Input: Block suspend while event queue is not empty Arve Hjønnevåg
2010-04-28 4:31 ` Arve Hjønnevåg
2010-04-28 4:31 ` [PATCH 8/8] power_supply: Block suspend while power supply change notifications are pending Arve Hjønnevåg
2010-04-28 4:31 ` Arve Hjønnevåg
2010-04-28 6:06 ` [PATCH 6/8] PM: Add suspend blocking work Pavel Machek
2010-04-28 6:06 ` Pavel Machek
2010-04-28 6:44 ` Tejun Heo
2010-04-28 6:44 ` Tejun Heo
2010-04-28 7:02 ` Arve Hjønnevåg
2010-04-28 7:18 ` Tejun Heo
2010-04-28 7:18 ` Tejun Heo
2010-04-28 7:02 ` Arve Hjønnevåg
2010-04-28 19:40 ` Oleg Nesterov
2010-04-28 20:22 ` Tejun Heo
2010-04-28 20:22 ` Tejun Heo
2010-04-28 21:08 ` Rafael J. Wysocki
2010-04-28 21:08 ` Rafael J. Wysocki
2010-04-29 18:58 ` Oleg Nesterov
2010-04-29 18:58 ` Oleg Nesterov
2010-04-29 19:44 ` [PATCH 0/2] workqueue fixlets (Was: PM: Add suspend blocking work.) Oleg Nesterov
2010-04-29 19:44 ` Oleg Nesterov
2010-04-29 19:45 ` [PATCH 1/2] workqueues: flush_delayed_work: keep the original workqueue for re-queueing Oleg Nesterov
2010-04-29 19:45 ` Oleg Nesterov
2010-04-30 5:15 ` Tejun Heo
2010-04-30 5:15 ` Tejun Heo
2010-04-29 19:45 ` [PATCH 2/2] workqueues: export keventd_wq Oleg Nesterov
2010-04-29 19:45 ` Oleg Nesterov
2010-04-30 5:16 ` Tejun Heo
2010-04-30 5:16 ` Tejun Heo
2010-04-30 5:39 ` Arve Hjønnevåg
2010-04-30 5:39 ` Arve Hjønnevåg
2010-04-30 5:52 ` Tejun Heo
2010-04-30 5:52 ` Tejun Heo
2010-04-30 18:05 ` Oleg Nesterov
2010-04-30 18:05 ` Oleg Nesterov
2010-04-30 18:11 ` Tejun Heo
2010-04-30 18:11 ` Tejun Heo
2010-04-29 21:08 ` [PATCH 6/8] PM: Add suspend blocking work Rafael J. Wysocki
2010-04-29 21:08 ` Rafael J. Wysocki
2010-04-28 21:09 ` Rafael J. Wysocki
2010-04-28 21:09 ` Rafael J. Wysocki
2010-04-28 22:09 ` Arve Hjønnevåg
2010-04-28 22:19 ` Rafael J. Wysocki
2010-04-29 3:47 ` Arve Hjønnevåg
2010-04-29 3:47 ` Arve Hjønnevåg
2010-04-29 21:09 ` Rafael J. Wysocki
2010-04-29 21:09 ` Rafael J. Wysocki
2010-04-28 22:19 ` Rafael J. Wysocki
2010-04-28 22:09 ` Arve Hjønnevåg
2010-04-28 19:40 ` Oleg Nesterov
2010-04-28 5:07 ` [PATCH 3/8] PM: suspend_block: Abort task freezing if a suspend_blocker is active Pavel Machek
2010-04-28 5:07 ` Pavel Machek
2010-04-28 20:58 ` [PATCH 2/8] PM: suspend_block: Add driver to access suspend blockers from user-space Rafael J. Wysocki
2010-04-28 22:31 ` Arve Hjønnevåg
2010-04-28 22:31 ` Arve Hjønnevåg
2010-04-28 23:05 ` Rafael J. Wysocki
2010-04-28 23:38 ` Arve Hjønnevåg
2010-04-28 23:38 ` Arve Hjønnevåg
2010-04-29 21:11 ` Rafael J. Wysocki
2010-04-29 21:11 ` Rafael J. Wysocki
2010-04-29 23:41 ` Arve Hjønnevåg
2010-04-29 23:41 ` Arve Hjønnevåg
2010-04-28 23:05 ` Rafael J. Wysocki
2010-04-28 20:58 ` Rafael J. Wysocki
2010-04-28 6:07 ` [PATCH 1/8] PM: Add suspend block api Pavel Machek
2010-04-28 6:07 ` Pavel Machek
2010-04-28 19:13 ` Alan Stern
2010-04-28 21:13 ` Rafael J. Wysocki
2010-04-28 21:13 ` Rafael J. Wysocki
2010-04-28 23:35 ` Arve Hjønnevåg
2010-04-29 15:41 ` Alan Stern
2010-04-29 15:41 ` Alan Stern
2010-04-29 23:39 ` Arve Hjønnevåg
2010-04-29 23:39 ` Arve Hjønnevåg
2010-04-30 14:41 ` Alan Stern
2010-04-30 14:41 ` Alan Stern
2010-04-28 23:35 ` Arve Hjønnevåg
2010-04-28 19:13 ` Alan Stern
2010-04-28 20:50 ` Rafael J. Wysocki
2010-04-29 3:37 ` Arve Hjønnevåg
2010-04-29 3:37 ` Arve Hjønnevåg
2010-04-29 21:16 ` Rafael J. Wysocki
2010-04-29 21:16 ` Rafael J. Wysocki
2010-04-30 4:24 ` Tejun Heo
2010-04-30 4:24 ` Tejun Heo
2010-04-30 17:26 ` Oleg Nesterov [this message]
2010-05-20 8:30 ` Tejun Heo
2010-05-20 22:27 ` Rafael J. Wysocki
2010-05-21 6:35 ` Tejun Heo
2010-05-21 6:35 ` Tejun Heo
2010-05-20 22:27 ` Rafael J. Wysocki
2010-05-20 8:30 ` Tejun Heo
2010-04-30 17:26 ` Oleg Nesterov
2010-04-28 20:50 ` Rafael J. Wysocki
2010-05-06 15:18 ` Alan Stern
2010-05-06 15:18 ` Alan Stern
2010-05-06 19:28 ` Rafael J. Wysocki
2010-05-06 19:40 ` Alan Stern
2010-05-06 19:40 ` Alan Stern
2010-05-06 23:48 ` Arve Hjønnevåg
2010-05-06 23:48 ` Arve Hjønnevåg
2010-05-07 14:22 ` Alan Stern
2010-05-07 14:22 ` Alan Stern
2010-05-06 19:28 ` Rafael J. Wysocki
-- strict thread matches above, loose matches on Subject: below --
2010-05-14 4:11 [PATCH 0/8] Suspend block api (version 7) Arve Hjønnevåg
2010-05-14 4:11 ` [PATCH 1/8] PM: Add suspend block api Arve Hjønnevåg
2010-05-14 4:11 ` Arve Hjønnevåg
2010-05-14 6:13 ` Paul Walmsley
2010-05-14 6:27 ` Paul Walmsley
2010-05-14 7:14 ` Arve Hjønnevåg
2010-05-18 2:17 ` Paul Walmsley
2010-05-18 3:06 ` Arve Hjønnevåg
2010-05-18 3:34 ` Paul Walmsley
2010-05-18 3:51 ` Arve Hjønnevåg
2010-05-19 15:55 ` Paul Walmsley
2010-05-20 0:35 ` Arve Hjønnevåg
2010-05-18 13:11 ` Pavel Machek
2010-05-18 13:11 ` Pavel Machek
2010-05-20 9:11 ` Florian Mickler
2010-05-20 9:11 ` Florian Mickler
2010-05-20 9:26 ` Florian Mickler
2010-05-20 9:26 ` Florian Mickler
2010-05-20 22:18 ` Rafael J. Wysocki
2010-05-20 22:18 ` Rafael J. Wysocki
2010-05-21 6:04 ` Florian Mickler
2010-05-21 6:04 ` Florian Mickler
2010-05-27 15:41 ` Pavel Machek
2010-05-27 15:41 ` Pavel Machek
2010-05-05 20:28 [linux-pm] " mark gross
2010-05-05 21:12 ` Alan Stern
2010-05-05 21:37 ` Brian Swetland
2010-05-05 21:37 ` [linux-pm] " Brian Swetland
2010-05-05 23:47 ` Tony Lindgren
2010-05-05 23:47 ` [linux-pm] " Tony Lindgren
2010-05-05 23:56 ` Brian Swetland
2010-05-06 0:05 ` Tony Lindgren
2010-05-06 4:16 ` Arve Hjønnevåg
2010-05-06 17:04 ` Tony Lindgren
2010-05-06 17:04 ` [linux-pm] " Tony Lindgren
2010-05-07 0:10 ` Arve Hjønnevåg
2010-05-07 0:10 ` [linux-pm] " Arve Hjønnevåg
2010-05-07 15:54 ` Tony Lindgren
2010-05-28 6:43 ` [linux-pm] " Pavel Machek
2010-05-28 7:01 ` Arve Hjønnevåg
2010-05-28 6:43 ` Pavel Machek
2010-05-06 4:16 ` Arve Hjønnevåg
2010-05-06 0:05 ` Tony Lindgren
2010-05-05 23:56 ` Brian Swetland
2010-05-06 13:40 ` [linux-pm] " Matthew Garrett
2010-05-06 17:01 ` Tony Lindgren
2010-05-06 17:01 ` [linux-pm] " Tony Lindgren
2010-05-06 17:09 ` Matthew Garrett
2010-05-06 17:14 ` Tony Lindgren
2010-05-06 17:22 ` Matthew Garrett
2010-05-06 17:22 ` [linux-pm] " Matthew Garrett
2010-05-06 17:38 ` Tony Lindgren
2010-05-06 17:38 ` [linux-pm] " Tony Lindgren
2010-05-06 17:43 ` Matthew Garrett
2010-05-06 18:33 ` Tony Lindgren
2010-05-06 18:44 ` Matthew Garrett
2010-05-07 2:05 ` Tony Lindgren
2010-05-07 17:12 ` Matthew Garrett
2010-05-07 17:12 ` [linux-pm] " Matthew Garrett
2010-05-07 17:35 ` Tony Lindgren
2010-05-07 17:50 ` Matthew Garrett
2010-05-07 18:01 ` Tony Lindgren
2010-05-07 18:28 ` Matthew Garrett
2010-05-07 18:28 ` [linux-pm] " Matthew Garrett
2010-05-07 18:43 ` Tony Lindgren
2010-05-07 18:46 ` Matthew Garrett
2010-05-07 18:46 ` [linux-pm] " Matthew Garrett
2010-05-07 19:06 ` Daniel Walker
2010-05-07 19:06 ` [linux-pm] " Daniel Walker
2010-05-07 19:28 ` Tony Lindgren
2010-05-07 19:33 ` Matthew Garrett
2010-05-07 19:33 ` [linux-pm] " Matthew Garrett
2010-05-07 19:55 ` Tony Lindgren
2010-05-07 19:55 ` [linux-pm] " Tony Lindgren
2010-05-07 20:28 ` Matthew Garrett
2010-05-07 20:53 ` Tony Lindgren
2010-05-07 21:03 ` Matthew Garrett
2010-05-07 21:25 ` Tony Lindgren
2010-05-07 21:32 ` Arve Hjønnevåg
2010-05-07 21:39 ` [linux-pm] " Matthew Garrett
2010-05-07 21:42 ` Tony Lindgren
2010-05-07 21:42 ` [linux-pm] " Tony Lindgren
2010-05-07 21:48 ` Matthew Garrett
2010-05-07 21:48 ` [linux-pm] " Matthew Garrett
2010-05-07 22:00 ` Tony Lindgren
2010-05-07 22:28 ` Matthew Garrett
2010-05-07 22:00 ` Tony Lindgren
2010-05-07 21:39 ` Matthew Garrett
2010-05-07 21:25 ` Tony Lindgren
2010-05-07 21:30 ` Daniel Walker
2010-05-07 21:30 ` [linux-pm] " Daniel Walker
2010-05-07 21:35 ` Arve Hjønnevåg
2010-05-07 21:35 ` [linux-pm] " Arve Hjønnevåg
2010-05-07 21:43 ` Daniel Walker
2010-05-07 21:38 ` Matthew Garrett
2010-05-07 21:03 ` Matthew Garrett
2010-05-07 20:53 ` Tony Lindgren
2010-05-07 20:28 ` Matthew Garrett
2010-05-07 19:28 ` Tony Lindgren
2010-05-07 18:01 ` Tony Lindgren
2010-05-07 17:50 ` Matthew Garrett
2010-05-07 17:35 ` Tony Lindgren
2010-05-07 2:05 ` Tony Lindgren
2010-05-06 18:44 ` Matthew Garrett
2010-05-06 18:47 ` [linux-pm] " Alan Stern
2010-05-07 2:20 ` Tony Lindgren
2010-05-06 18:47 ` Alan Stern
2010-05-06 18:33 ` Tony Lindgren
2010-05-06 17:43 ` Matthew Garrett
2010-05-28 13:29 ` [linux-pm] " Pavel Machek
2010-05-28 13:42 ` Brian Swetland
2010-05-28 13:29 ` Pavel Machek
2010-05-06 17:35 ` [linux-pm] " Daniel Walker
2010-05-06 18:36 ` Tony Lindgren
2010-05-06 18:36 ` [linux-pm] " Tony Lindgren
2010-05-06 19:11 ` Daniel Walker
2010-05-07 2:00 ` Tony Lindgren
2010-05-07 17:20 ` Daniel Walker
2010-05-07 17:36 ` Matthew Garrett
2010-05-07 17:36 ` [linux-pm] " Matthew Garrett
2010-05-07 17:40 ` Daniel Walker
2010-05-07 17:51 ` Matthew Garrett
2010-05-07 18:00 ` Daniel Walker
2010-05-07 18:00 ` [linux-pm] " Daniel Walker
2010-05-07 18:17 ` Tony Lindgren
2010-05-07 17:51 ` Matthew Garrett
2010-05-07 17:40 ` Daniel Walker
2010-05-07 17:50 ` Tony Lindgren
2010-05-07 17:20 ` Daniel Walker
2010-05-07 2:00 ` Tony Lindgren
2010-05-06 19:11 ` Daniel Walker
2010-05-06 17:35 ` Daniel Walker
2010-05-07 3:45 ` mgross
2010-05-06 17:14 ` Tony Lindgren
2010-05-07 3:45 ` mgross
2010-05-07 3:45 ` [linux-pm] " mgross
2010-05-07 4:10 ` Arve Hjønnevåg
2010-05-06 17:09 ` Matthew Garrett
2010-05-06 13:40 ` Matthew Garrett
2010-05-05 21:12 ` Alan Stern
2010-05-04 16:03 [linux-pm] " mark gross
2010-05-04 17:16 ` Alan Stern
2010-05-05 1:50 ` mark gross
2010-05-05 13:31 ` Matthew Garrett
2010-05-05 20:09 ` mark gross
2010-05-05 20:09 ` [linux-pm] " mark gross
2010-05-05 20:21 ` Matthew Garrett
2010-05-05 13:31 ` Matthew Garrett
2010-05-05 15:44 ` Alan Stern
2010-05-05 15:44 ` [linux-pm] " Alan Stern
2010-05-05 20:28 ` mark gross
2010-05-05 1:50 ` mark gross
2010-05-04 17:16 ` Alan Stern
2010-04-30 22:36 [PATCH 0/8] Suspend block api (version 6) Arve Hjønnevåg
2010-04-30 22:36 ` [PATCH 1/8] PM: Add suspend block api Arve Hjønnevåg
2010-05-02 6:56 ` Pavel Machek
2010-05-02 20:10 ` Rafael J. Wysocki
2010-05-02 20:10 ` Rafael J. Wysocki
2010-05-02 20:52 ` Pavel Machek
2010-05-02 20:52 ` Pavel Machek
2010-05-02 21:29 ` Rafael J. Wysocki
2010-05-02 21:29 ` Rafael J. Wysocki
2010-05-03 19:01 ` Pavel Machek
2010-05-03 19:01 ` Pavel Machek
2010-05-03 21:38 ` Rafael J. Wysocki
2010-05-03 21:38 ` Rafael J. Wysocki
2010-05-03 22:11 ` Alan Stern
2010-05-03 22:11 ` Alan Stern
2010-05-03 22:24 ` Arve Hjønnevåg
2010-05-03 22:24 ` Arve Hjønnevåg
2010-05-02 6:56 ` Pavel Machek
2010-05-02 7:01 ` Pavel Machek
2010-05-02 7:01 ` Pavel Machek
2010-05-04 5:12 ` [linux-pm] " mark gross
2010-05-04 13:59 ` Alan Stern
2010-05-04 16:03 ` mark gross
2010-05-04 13:59 ` Alan Stern
2010-05-04 20:40 ` Arve Hjønnevåg
2010-05-04 5:12 ` mark gross
2010-05-13 19:01 ` Paul Walmsley
2010-05-14 20:05 ` Paul Walmsley
2010-04-30 22:36 ` Arve Hjønnevåg
2009-04-16 6:00 Sam Shang
2009-04-15 1:41 [RFC][PATCH 0/8] Suspend " Arve Hjønnevåg
2009-04-15 1:41 ` [PATCH 1/8] PM: Add suspend " Arve Hjønnevåg
2009-04-15 15:29 ` Alan Stern
2009-04-15 19:08 ` mark gross
2009-04-16 0:40 ` Arve Hjønnevåg
2009-04-16 0:34 ` Arve Hjønnevåg
2009-04-15 22:31 ` mark gross
2009-04-16 1:45 ` Arve Hjønnevåg
2009-04-16 17:49 ` mark gross
2009-04-20 9:29 ` Pavel Machek
2009-04-21 4:44 ` Arve Hjønnevåg
2009-04-24 20:59 ` Pavel Machek
2009-04-29 21:24 ` Rafael J. Wysocki
2009-04-29 22:52 ` Arve Hjønnevåg
2009-04-29 22:34 ` Rafael J. Wysocki
2009-04-29 23:45 ` Arve Hjønnevåg
2009-04-30 0:49 ` Arve Hjønnevåg
2009-04-26 9:42 ` Pavel Machek
2009-05-02 12:17 ` Rafael J. Wysocki
2009-05-02 12:14 ` Rafael J. Wysocki
2009-05-02 20:51 ` Pavel Machek
2009-05-05 3:48 ` Arve Hjønnevåg
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