From: Johannes Berg <johannes@sipsolutions.net>
To: Pavel Machek <pavel@ucw.cz>
Cc: linux-pm <linux-pm@lists.osdl.org>
Subject: Re: [PATCH] pm_ops: add irq enable/disable hooks
Date: Fri, 06 Apr 2007 23:59:27 +0200 [thread overview]
Message-ID: <1175896767.8459.6.camel@johannes.berg> (raw)
In-Reply-To: <20070406191903.GD2583@elf.ucw.cz>
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On Fri, 2007-04-06 at 21:19 +0200, Pavel Machek wrote:
> And why do _you_ need it? Unfortunately I do not know what the
> decrementer is...?
The decrementer is a sort of timer that counts down and once it
overflows raises an exception in the CPU. Like a timer interrupt, but
not coming from anything external. We need to be able to make sure we
don't get a decrementer exception at some spots.
Also, we need to call some platform function things at that point to
prepare the system for suspend, and it needs to be done with interrupts
enabled but after all devices are suspended.
johannes
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next prev parent reply other threads:[~2007-04-06 21:59 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-05 21:54 [PATCH] pm_ops: add irq enable/disable hooks Johannes Berg
2007-04-05 23:30 ` Rafael J. Wysocki
2007-04-05 23:28 ` Johannes Berg
2007-04-06 0:02 ` Rafael J. Wysocki
2007-04-06 0:09 ` Johannes Berg
2007-04-06 0:17 ` Rafael J. Wysocki
2007-04-06 8:48 ` Johannes Berg
2007-04-06 9:41 ` Rafael J. Wysocki
2007-04-06 9:44 ` Johannes Berg
2007-04-06 10:02 ` Rafael J. Wysocki
2007-04-06 10:00 ` Johannes Berg
2007-04-06 19:19 ` Pavel Machek
2007-04-06 21:59 ` Johannes Berg [this message]
2007-04-10 11:36 ` Pavel Machek
2007-04-10 11:45 ` Johannes Berg
2007-04-10 12:00 ` Pavel Machek
2007-04-10 13:42 ` Johannes Berg
2007-04-11 11:22 ` Benjamin Herrenschmidt
2007-04-11 14:07 ` Alan Stern
2007-04-11 16:39 ` Johannes Berg
2007-04-11 21:40 ` Benjamin Herrenschmidt
2007-04-11 11:15 ` Johannes Berg
2007-04-06 19:16 ` Pavel Machek
2007-04-11 15:54 ` [PATCH v2] pm_ops: add system quiesce/activate hooks Johannes Berg
2007-04-11 20:47 ` Dmitry Krivoschekov
2007-04-12 8:39 ` Johannes Berg
2007-04-12 8:42 ` Benjamin Herrenschmidt
2007-04-12 10:16 ` Pavel Machek
2007-04-12 10:45 ` Rafael J. Wysocki
2007-04-12 10:47 ` Johannes Berg
2007-04-13 21:00 ` Pavel Machek
2007-04-13 21:11 ` Paul Mackerras
2007-04-13 21:11 ` Johannes Berg
2007-04-13 21:43 ` Pavel Machek
2007-04-13 21:15 ` Benjamin Herrenschmidt
2007-04-12 11:23 ` Benjamin Herrenschmidt
2007-04-12 15:03 ` Rafael J. Wysocki
2007-04-12 16:32 ` David Brownell
2007-04-13 6:52 ` Johannes Berg
2007-04-13 7:59 ` [PATCH v3] " Johannes Berg
2007-04-12 17:36 ` [PATCH v2] " Dmitry Krivoschekov
2007-04-12 20:51 ` Benjamin Herrenschmidt
2007-04-13 6:54 ` Johannes Berg
2007-04-13 8:04 ` David Brownell
2007-04-13 8:59 ` Johannes Berg
2007-04-13 9:07 ` Benjamin Herrenschmidt
2007-04-13 11:47 ` Rafael J. Wysocki
2007-04-13 12:58 ` Johannes Berg
2007-04-13 13:26 ` [PATCH v4] " Johannes Berg
2007-04-13 20:43 ` Rafael J. Wysocki
2007-04-13 20:58 ` Pavel Machek
2007-04-13 21:06 ` Johannes Berg
2007-04-13 21:12 ` Pavel Machek
2007-04-13 21:18 ` Johannes Berg
2007-04-13 21:33 ` Pavel Machek
2007-04-13 21:45 ` Johannes Berg
2007-04-13 21:52 ` Pavel Machek
2007-04-13 21:59 ` Johannes Berg
2007-04-13 22:18 ` Rafael J. Wysocki
2007-04-13 22:20 ` Johannes Berg
2007-04-13 22:49 ` Rafael J. Wysocki
2007-04-13 22:55 ` Johannes Berg
2007-04-13 22:09 ` Rafael J. Wysocki
2007-04-13 22:13 ` Johannes Berg
2007-04-13 22:16 ` Pavel Machek
2007-04-14 16:55 ` Paul Mackerras
2007-04-13 22:25 ` Benjamin Herrenschmidt
2007-04-13 22:39 ` Pavel Machek
2007-04-13 23:19 ` Benjamin Herrenschmidt
2007-04-14 9:14 ` Rafael J. Wysocki
2007-04-14 9:19 ` Johannes Berg
2007-04-15 0:19 ` Benjamin Herrenschmidt
2007-04-16 7:32 ` Pavel Machek
2007-04-16 8:37 ` Johannes Berg
2007-04-16 12:47 ` Pavel Machek
2007-04-17 4:58 ` Paul Mackerras
2007-04-18 7:50 ` Benjamin Herrenschmidt
2007-04-13 22:47 ` Rafael J. Wysocki
2007-04-13 21:18 ` Benjamin Herrenschmidt
2007-04-13 21:56 ` Pavel Machek
2007-04-13 22:01 ` Johannes Berg
2007-04-13 22:24 ` Benjamin Herrenschmidt
2007-04-13 21:15 ` Benjamin Herrenschmidt
2007-04-13 21:50 ` Pavel Machek
2007-04-13 22:23 ` Benjamin Herrenschmidt
2007-04-14 22:10 ` David Brownell
2007-04-13 21:05 ` [PATCH v2] " Pavel Machek
2007-04-12 8:44 ` Benjamin Herrenschmidt
2007-04-17 17:18 ` [PATCH] s2ram: add arch irq disable/enable hooks Johannes Berg
2007-04-18 11:27 ` Pavel Machek
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