From: Pavel Machek <pavel@ucw.cz>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
suspend-devel@lists.sourceforge.net,
pm list <linux-pm@lists.osdl.org>
Subject: Re: [linux-pm] [RFC][PATCH -mm 1/5] PM: Make freeze_processes SMP-safe
Date: Sat, 2 Dec 2006 11:55:13 +0000 [thread overview]
Message-ID: <20061202115512.GB4030@ucw.cz> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0612011615150.2629-100000@iolanthe.rowland.org>
Hi!
> > We send fake signals to them, so they enter get_signal_to_deliver() and they
> > call try_to_freeze() from there.
>
> Well then, see, you're doing exactly what you said should never happen --
> you are freezing a user thread while it might be holding a lock that the
> unfreezable usb-storage thread needs.
I do not think it is okay to call get_signal_to_deliver with *any*
lock held... Or do you have example when that is broken?
Pavel
--
Thanks for all the (sleeping) penguins.
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next prev parent reply other threads:[~2006-12-02 11:55 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-25 21:10 [RFC][PATCH -mm] PM: Change ordering of suspend and resume code Rafael J. Wysocki
2006-11-25 21:29 ` [RFC][PATCH -mm 1/5] PM: Make freeze_processes SMP-safe Rafael J. Wysocki
2006-11-26 7:47 ` Pavel Machek
2006-11-26 10:02 ` Rafael J. Wysocki
2006-11-26 11:15 ` Rafael J. Wysocki
2006-11-26 13:34 ` Rafael J. Wysocki
2006-11-26 19:48 ` Pavel Machek
2006-11-26 23:09 ` Rafael J. Wysocki
2006-11-26 23:28 ` Pavel Machek
2006-11-27 2:41 ` [linux-pm] " Alan Stern
2006-11-27 20:04 ` Rafael J. Wysocki
2006-11-27 10:50 ` Pavel Machek
2006-11-27 20:02 ` Rafael J. Wysocki
2006-11-29 23:56 ` Pavel Machek
2006-11-28 23:40 ` Rafael J. Wysocki
2006-11-29 23:55 ` Pavel Machek
2006-11-30 0:21 ` Rafael J. Wysocki
2006-11-30 15:07 ` Rafael J. Wysocki
2006-11-30 15:43 ` [linux-pm] " Alan Stern
2006-11-30 16:04 ` Rafael J. Wysocki
2006-11-30 19:23 ` Rafael J. Wysocki
2006-11-30 22:34 ` Alan Stern
2006-11-30 22:57 ` Rafael J. Wysocki
2006-12-01 14:56 ` Alan Stern
2006-12-01 19:57 ` Rafael J. Wysocki
2006-12-01 21:17 ` Alan Stern
2006-12-01 21:19 ` Rafael J. Wysocki
2006-12-01 22:07 ` Alan Stern
2006-12-01 23:38 ` Rafael J. Wysocki
2006-12-02 11:55 ` Pavel Machek [this message]
2006-12-02 15:39 ` Alan Stern
2006-12-03 11:17 ` Rafael J. Wysocki
2006-11-30 21:55 ` [Suspend-devel] " Rafael J. Wysocki
2006-11-26 19:45 ` [linux-pm] " Pavel Machek
2006-11-26 23:37 ` Luca
2006-11-25 21:34 ` [RFC][PATCH -mm 2/5] swsusp: Change code ordering in disk.c Rafael J. Wysocki
2006-11-25 21:38 ` [RFC][PATCH -mm 3/5] swsusp: Change code ordering in user.c Rafael J. Wysocki
2006-11-25 21:45 ` [RFC][PATCH -mm 4/5] swsusp: Add PLATFORM_SNAPSHOT and PLATFORM_RESTORE ioctls Rafael J. Wysocki
2006-11-26 19:51 ` [linux-pm] " Pavel Machek
2006-11-26 23:12 ` Rafael J. Wysocki
2006-11-26 23:29 ` Pavel Machek
2006-11-27 10:37 ` Pavel Machek
2006-11-25 21:49 ` [RFC][PATCH -mm 5/5] PM: Change code ordering in main.c Rafael J. Wysocki
2006-11-26 7:44 ` [RFC][PATCH -mm] PM: Change ordering of suspend and resume code Pavel Machek
2006-11-26 10:08 ` Rafael J. Wysocki
2006-11-26 21:31 ` Pavel Machek
2006-11-26 23:15 ` Rafael J. Wysocki
2006-11-30 14:02 ` Stefan Seyfried
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