From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: mjg59@srcf.ucam.org, Miklos Szeredi <miklos@szeredi.hu>,
linux-kernel@vger.kernel.org, pavel@ucw.cz,
johannes@sipsolutions.net, linux-pm@lists.linux-foundation.org
Subject: Re: Re: [PATCH] Remove process freezer from suspend to RAM pathway
Date: Fri, 06 Jul 2007 18:59:13 +1000 [thread overview]
Message-ID: <1183712354.3388.126.camel@localhost.localdomain> (raw)
In-Reply-To: <200707060913.24131.rjw@sisk.pl>
On Fri, 2007-07-06 at 09:13 +0200, Rafael J. Wysocki wrote:
>
> The only reason (I know of) why we don't handle uninterruptible tasks in the
> freezer is that we're afraid of the suspend process deadlocking with an
> uninterruptible task holding a lock, but AFAICS the probability of such an
> event is extremely small.
What would deadlock specifically ? One of the drivers trying to acquire
that lock ? It would be a driver bug then.
> Also, the powermac suspend will deadlock in such cases, so the fact that
> it doesn't deadlock means that they don't occur very often (if at all).
Ben.
next prev parent reply other threads:[~2007-07-06 8:59 UTC|newest]
Thread overview: 143+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.44L0.0707051713440.2753-100000@iolanthe.rowland.org>
2007-07-05 21:26 ` Re: [PATCH] Remove process freezer from suspend to RAM pathway Miklos Szeredi
2007-07-05 21:37 ` Oliver Neukum
[not found] ` <200707052337.27066.oliver@neukum.org>
2007-07-06 7:13 ` Rafael J. Wysocki
[not found] ` <200707060913.24131.rjw@sisk.pl>
2007-07-06 8:59 ` Benjamin Herrenschmidt [this message]
2007-07-06 9:31 ` Oliver Neukum
[not found] ` <200707061131.08475.oliver@neukum.org>
2007-07-06 9:53 ` Rafael J. Wysocki
2007-07-07 2:44 ` Benjamin Herrenschmidt
2007-07-07 20:48 ` Rafael J. Wysocki
[not found] ` <200707072248.06970.rjw@sisk.pl>
2007-07-08 0:50 ` Benjamin Herrenschmidt
[not found] ` <200707061153.05091.rjw@sisk.pl>
2007-07-07 2:46 ` Benjamin Herrenschmidt
[not found] <Pine.LNX.4.44L0.0707051014180.3728-100000@iolanthe.rowland.org>
2007-07-05 22:59 ` Benjamin Herrenschmidt
2007-07-06 7:20 ` Rafael J. Wysocki
2007-07-06 15:13 ` Alan Stern
2007-07-07 7:56 ` Pavel Machek
[not found] ` <Pine.LNX.4.44L0.0707061111050.3737-100000@iolanthe.rowland.org>
2007-07-08 7:19 ` Paul Mackerras
[not found] <Pine.LNX.4.44L0.0707051704580.2557-100000@iolanthe.rowland.org>
2007-07-05 21:15 ` Oliver Neukum
[not found] ` <200707052315.38770.oliver@neukum.org>
2007-07-05 21:31 ` Miklos Szeredi
[not found] <E1I6YXX-0001yE-00@dorka.pomaz.szeredi.hu>
2007-07-05 21:15 ` Alan Stern
[not found] <18059.6726.218205.104212@cargo.ozlabs.ibm.com>
2007-07-04 15:12 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.0707041104140.25704-100000@netrider.rowland.org>
2007-07-05 0:35 ` Paul Mackerras
2007-07-05 14:42 ` Alan Stern
[not found] <18059.7151.841436.329553@cargo.ozlabs.ibm.com>
2007-07-04 15:04 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.0707041057230.25704-100000@netrider.rowland.org>
2007-07-05 0:28 ` Paul Mackerras
2007-07-03 19:32 Oliver Neukum
2007-07-03 20:02 ` Alan Stern
2007-07-03 20:19 ` Miklos Szeredi
2007-07-03 20:45 ` Oliver Neukum
[not found] ` <E1I5oq4-0004sc-00@dorka.pomaz.szeredi.hu>
2007-07-03 21:20 ` Rafael J. Wysocki
[not found] <8CIbE-3y1-1@gated-at.bofh.it>
[not found] ` <8CJKt-62G-35@gated-at.bofh.it>
[not found] ` <8CKZS-7Ur-3@gated-at.bofh.it>
[not found] ` <8CLjc-8iq-29@gated-at.bofh.it>
[not found] ` <8CO7m-4k4-11@gated-at.bofh.it>
2007-07-03 12:03 ` Bodo Eggert
[not found] <20070703042916.GA17240@srcf.ucam.org>
[not found] ` <200707031608.06348.nigel@nigel.suspend2.net>
[not found] ` <1183447184.10386.102.camel@localhost.localdomain>
2007-07-03 7:44 ` Oliver Neukum
[not found] ` <200707030944.18702.oliver@neukum.org>
2007-07-03 10:47 ` Miklos Szeredi
[not found] ` <E1I5fug-0003ZS-00@dorka.pomaz.szeredi.hu>
2007-07-03 11:07 ` Oliver Neukum
[not found] ` <200707031307.41366.oliver@neukum.org>
2007-07-03 11:22 ` Miklos Szeredi
[not found] ` <E1I5gSu-0003f4-00@dorka.pomaz.szeredi.hu>
2007-07-03 11:27 ` Oliver Neukum
[not found] ` <200707031327.56577.oliver@neukum.org>
2007-07-03 11:45 ` Benjamin Herrenschmidt
[not found] ` <1183463113.10386.114.camel@localhost.localdomain>
2007-07-03 11:50 ` Oliver Neukum
2007-07-05 0:02 ` Pavel Machek
2007-07-03 11:44 ` Benjamin Herrenschmidt
2007-07-03 11:55 ` Oliver Neukum
[not found] ` <200707031355.51028.oliver@neukum.org>
2007-07-03 23:40 ` Paul Mackerras
[not found] ` <18058.56956.595143.15424@cargo.ozlabs.ibm.com>
2007-07-04 7:02 ` Miklos Szeredi
2007-07-04 8:02 ` Paul Mackerras
2007-07-04 8:26 ` Miklos Szeredi
[not found] ` <E1I60CR-00066n-00@dorka.pomaz.szeredi.hu>
2007-07-04 10:26 ` Rafael J. Wysocki
2007-07-03 12:58 ` Rafael J. Wysocki
2007-07-03 15:46 ` Miklos Szeredi
2007-07-03 11:23 ` Paul Mackerras
2007-07-03 11:40 ` Benjamin Herrenschmidt
2007-07-03 11:46 ` Oliver Neukum
2007-07-03 13:07 ` Rafael J. Wysocki
[not found] ` <18058.12724.163599.707035@cargo.ozlabs.ibm.com>
2007-07-03 11:42 ` Oliver Neukum
2007-07-03 23:11 ` Paul Mackerras
[not found] ` <18058.55215.185633.434117@cargo.ozlabs.ibm.com>
2007-07-04 8:11 ` Oliver Neukum
[not found] ` <200707041011.33279.oliver@neukum.org>
2007-07-04 8:27 ` Paul Mackerras
[not found] ` <18059.23015.860618.268754@cargo.ozlabs.ibm.com>
2007-07-04 8:39 ` Oliver Neukum
[not found] ` <200707041039.30015.oliver@neukum.org>
2007-07-04 9:21 ` Paul Mackerras
[not found] ` <18059.26259.765791.62319@cargo.ozlabs.ibm.com>
2007-07-04 10:08 ` Oliver Neukum
[not found] ` <200707041208.40735.oliver@neukum.org>
2007-07-04 10:46 ` Paul Mackerras
2007-07-04 10:53 ` Oliver Neukum
2007-07-04 10:59 ` Paul Mackerras
[not found] ` <18059.32169.906914.258802@cargo.ozlabs.ibm.com>
2007-07-04 11:02 ` Oliver Neukum
2007-07-04 14:44 ` Alan Stern
2007-07-03 15:58 ` Alan Stern
2007-07-04 4:02 ` Paul Mackerras
[not found] ` <200707031456.40890.rjw@sisk.pl>
2007-07-03 14:21 ` Johannes Berg
[not found] ` <1183472474.3722.13.camel@johannes.berg>
2007-07-03 14:50 ` Alan Stern
2007-07-03 14:59 ` Johannes Berg
[not found] ` <1183474748.3722.33.camel@johannes.berg>
2007-07-03 15:22 ` Rafael J. Wysocki
2007-07-03 17:38 ` Miklos Szeredi
2007-07-03 20:54 ` Rafael J. Wysocki
2007-07-03 20:21 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.0707031609070.7671-100000@iolanthe.rowland.org>
2007-07-04 4:59 ` Paul Mackerras
2007-07-04 14:57 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.0707041045150.25704-100000@netrider.rowland.org>
2007-07-05 0:23 ` Paul Mackerras
2007-07-05 6:58 ` Oliver Neukum
[not found] ` <200707050858.03638.oliver@neukum.org>
2007-07-05 8:17 ` Miklos Szeredi
[not found] ` <E1I6MWb-0008Tq-00@dorka.pomaz.szeredi.hu>
2007-07-05 8:24 ` Oliver Neukum
[not found] ` <200707051024.23528.oliver@neukum.org>
2007-07-05 8:41 ` Miklos Szeredi
[not found] ` <E1I6Mtu-000058-00@dorka.pomaz.szeredi.hu>
2007-07-05 8:48 ` Oliver Neukum
[not found] ` <200707051048.46202.oliver@neukum.org>
2007-07-05 8:58 ` Miklos Szeredi
[not found] ` <E1I6NAH-00008t-00@dorka.pomaz.szeredi.hu>
2007-07-05 10:02 ` Oliver Neukum
[not found] ` <200707051202.59375.oliver@neukum.org>
2007-07-05 10:14 ` Miklos Szeredi
2007-07-05 11:40 ` Rafael J. Wysocki
[not found] ` <200707051340.41901.rjw@sisk.pl>
2007-07-05 11:54 ` Miklos Szeredi
2007-07-05 13:23 ` Rafael J. Wysocki
[not found] ` <200707051523.44826.rjw@sisk.pl>
2007-07-05 13:28 ` Oliver Neukum
[not found] ` <200707051528.34754.oliver@neukum.org>
2007-07-05 13:46 ` Matthew Garrett
2007-07-05 14:02 ` Rafael J. Wysocki
[not found] ` <20070705134632.GA22177@srcf.ucam.org>
2007-07-05 14:09 ` Rafael J. Wysocki
[not found] ` <200707051609.25887.rjw@sisk.pl>
2007-07-05 14:23 ` Matthew Garrett
[not found] ` <20070705142318.GA22598@srcf.ucam.org>
2007-07-05 14:46 ` Ray Lee
2007-07-05 14:59 ` Rafael J. Wysocki
[not found] ` <2c0942db0707050746v2b8cdc9ew2c4656736b52895d@mail.gmail.com>
2007-07-05 15:00 ` Matthew Garrett
2007-07-05 16:06 ` Jeremy Maitin-Shepard
2007-07-06 5:45 ` Daniel Pittman
2007-07-05 22:38 ` Benjamin Herrenschmidt
2007-07-06 7:04 ` Rafael J. Wysocki
2007-07-06 7:30 ` Oliver Neukum
2007-07-05 9:18 ` Pavel Machek
[not found] ` <20070705091801.GB3084@elf.ucw.cz>
2007-07-05 9:31 ` Miklos Szeredi
[not found] ` <E1I6NgZ-0000F6-00@dorka.pomaz.szeredi.hu>
2007-07-05 11:54 ` Pavel Machek
2007-07-05 11:58 ` Rafael J. Wysocki
[not found] ` <20070705115400.GF3984@ucw.cz>
2007-07-05 12:07 ` Miklos Szeredi
2007-07-05 13:28 ` Rafael J. Wysocki
2007-07-05 19:38 ` Oliver Neukum
[not found] ` <200707052138.56920.oliver@neukum.org>
2007-07-05 19:44 ` Miklos Szeredi
[not found] ` <E1I6XFM-0001ek-00@dorka.pomaz.szeredi.hu>
2007-07-05 20:19 ` Rafael J. Wysocki
2007-07-05 20:34 ` Oliver Neukum
2007-07-05 20:46 ` Miklos Szeredi
2007-07-05 20:49 ` Oliver Neukum
[not found] ` <200707052249.45495.oliver@neukum.org>
2007-07-05 20:53 ` Oliver Neukum
2007-07-05 21:06 ` Alan Stern
2007-07-05 21:07 ` Miklos Szeredi
[not found] ` <200707052220.00555.rjw@sisk.pl>
2007-07-05 20:38 ` Miklos Szeredi
2007-07-05 21:01 ` Rafael J. Wysocki
2007-07-05 23:05 ` Benjamin Herrenschmidt
2007-07-06 3:59 ` Jeremy Maitin-Shepard
2007-07-06 7:32 ` Oliver Neukum
2007-07-07 12:17 ` Pavel Machek
2007-07-07 20:42 ` Miklos Szeredi
[not found] ` <200707051358.26963.rjw@sisk.pl>
2007-07-05 12:24 ` Miklos Szeredi
2007-07-05 13:31 ` Rafael J. Wysocki
[not found] ` <200707051531.37532.rjw@sisk.pl>
2007-07-05 13:50 ` Miklos Szeredi
[not found] ` <E1I6RjE-0000pP-00@dorka.pomaz.szeredi.hu>
2007-07-05 14:14 ` Rafael J. Wysocki
[not found] ` <200707051614.19300.rjw@sisk.pl>
2007-07-05 14:14 ` Miklos Szeredi
2007-07-05 22:04 ` Pavel Machek
[not found] ` <20070705220444.GD3881@elf.ucw.cz>
2007-07-06 7:07 ` Miklos Szeredi
2007-07-07 12:19 ` Pavel Machek
2007-07-06 7:16 ` Rafael J. Wysocki
2007-07-05 14:23 ` Alan Stern
2007-07-04 3:55 ` Paul Mackerras
2007-07-03 14:51 ` Rafael J. Wysocki
2007-07-03 14:48 ` Johannes Berg
[not found] ` <1183497290.3388.4.camel@localhost.localdomain>
[not found] ` <200707032332.49694.rjw@sisk.pl>
2007-07-04 3:29 ` Paul Mackerras
[not found] ` <18059.5165.861038.392332@cargo.ozlabs.ibm.com>
2007-07-04 10:33 ` Rafael J. Wysocki
2007-07-04 10:48 ` Paul Mackerras
[not found] ` <18059.31464.183382.358931@cargo.ozlabs.ibm.com>
2007-07-04 11:10 ` Rafael J. Wysocki
[not found] ` <200707041310.11336.rjw@sisk.pl>
2007-07-04 11:24 ` Paul Mackerras
2007-07-04 14:30 ` Rafael J. Wysocki
[not found] ` <200707041630.30048.rjw@sisk.pl>
2007-07-05 0:15 ` Paul Mackerras
[not found] ` <18060.14341.341604.666867@cargo.ozlabs.ibm.com>
2007-07-05 11:54 ` Rafael J. Wysocki
2007-07-07 12:09 ` Pavel Machek
2007-07-04 11:25 ` Paul Mackerras
[not found] ` <200707031454.42078.nigel@nigel.suspend2.net>
[not found] ` <1183441706.10386.73.camel@localhost.localdomain>
[not found] ` <20070705000301.GE2719@elf.ucw.cz>
2007-07-05 0:46 ` Paul Mackerras
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