From: Pavel Machek <pavel@ucw.cz>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: David Brownell <david-b@pacbell.net>,
Andrew Morton <akpm@osdl.org>,
Nigel Cunningham <ncunningham@cyclades.com>,
linux-pm@lists.osdl.org, linux-usb-devel@lists.sourceforge.net
Subject: Re: [patch/rft 2.6.17-rc2] swsusp resume must not device_suspend()
Date: Thu, 27 Apr 2006 08:08:27 +0000 [thread overview]
Message-ID: <20060427080826.GB2376@ucw.cz> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0604251010460.5330-100000@iolanthe.rowland.org>
[-- Attachment #1: Type: text/plain, Size: 853 bytes --]
Hi!
> The right way to solve this is to make sure that the resuming kernel can
> correctly determine whether the power session (way back from the original
> sw-suspend) is still intact. It's expected that in many cases it won't
> be, because most systems won't provide suspend current while the machine
> is off. We have to guarantee that the boot kernel's actions won't end up
> fooling the resuming kernel into thinking that the power sessions are
> intact when in fact they aren't. (Furthermore, in an ideal world, we
> would also make sure that the boot kernel won't destroy any power sessions
> that still _are_ intact. Right now we have no way to do this, because the
> drivers in the boot kernel don't know that it _is_ a boot kernel.)
You don't know if it is boot or resume until you read the disk, sorry.
Pavel
--
Thanks, Sharp!
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next prev parent reply other threads:[~2006-04-27 8:08 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-24 21:29 [patch/rft 2.6.17-rc2] swsusp resume must not device_suspend() David Brownell
2006-04-24 21:47 ` [linux-pm] " Rafael J. Wysocki
2006-04-24 22:47 ` David Brownell
2006-04-25 10:34 ` Nigel Cunningham
2006-04-25 14:41 ` Alan Stern
2006-04-25 17:37 ` [linux-pm] " David Brownell
2006-04-25 20:45 ` Alan Stern
2006-04-26 0:30 ` David Brownell
2006-04-27 8:20 ` Pavel Machek
2006-04-27 8:16 ` Pavel Machek
2006-04-27 8:08 ` Pavel Machek [this message]
2006-04-27 14:34 ` [linux-pm] " Alan Stern
2006-04-27 16:55 ` Patrick Mochel
2006-04-27 17:41 ` Alan Stern
2006-04-27 19:21 ` David Brownell
2006-04-27 20:35 ` Nigel Cunningham
2006-04-27 20:58 ` Pavel Machek
2006-04-25 16:56 ` David Brownell
2006-04-24 22:31 ` [linux-pm] " Nigel Cunningham
2006-04-25 8:32 ` Rafael J. Wysocki
2006-04-25 16:11 ` David Brownell
2006-04-25 18:56 ` Rafael J. Wysocki
2006-04-25 20:28 ` Nigel Cunningham
2006-04-25 20:53 ` [linux-pm] " Rafael J. Wysocki
2006-04-25 21:03 ` Nigel Cunningham
2006-04-25 22:06 ` Rafael J. Wysocki
2006-04-25 22:18 ` Nigel Cunningham
2006-04-25 22:34 ` Rafael J. Wysocki
2006-04-25 23:55 ` David Brownell
2006-04-26 1:16 ` Nigel Cunningham
2006-04-26 3:32 ` [linux-pm] " David Brownell
2006-04-26 3:44 ` Nigel Cunningham
2006-04-26 14:24 ` Alan Stern
2006-04-26 19:47 ` [linux-pm] " Nigel Cunningham
2006-04-25 21:04 ` David Brownell
2006-04-25 21:41 ` Pavel Machek
2006-04-25 23:13 ` [linux-pm] " David Brownell
2006-04-26 9:07 ` Pavel Machek
2006-04-25 21:55 ` Rafael J. Wysocki
2006-04-25 22:56 ` David Brownell
2006-04-26 11:26 ` Rafael J. Wysocki
2006-04-26 14:38 ` [linux-pm] " Alan Stern
2006-04-26 15:26 ` Rafael J. Wysocki
2006-04-26 15:38 ` Alan Stern
2006-04-26 16:09 ` Rafael J. Wysocki
2006-04-26 19:06 ` Alan Stern
2006-04-26 20:37 ` Rafael J. Wysocki
2006-04-26 21:31 ` David Brownell
2006-04-26 22:24 ` Rafael J. Wysocki
2006-04-27 19:44 ` David Brownell
2006-04-25 15:56 ` David Brownell
2006-04-27 10:54 ` Pavel Machek
2006-04-25 13:50 ` [linux-usb-devel] " Alan Stern
2006-04-25 15:49 ` David Brownell
2006-04-27 1:22 ` Patrick Mochel
2006-04-27 19:41 ` [linux-pm] " David Brownell
2006-05-02 16:12 ` Patrick Mochel
2006-05-26 3:06 ` David Brownell
2006-05-26 19:50 ` Rafael J. Wysocki
2006-05-26 23:16 ` Pavel Machek
2006-05-27 0:19 ` [linux-usb-devel] " David Brownell
2006-05-27 16:38 ` Pavel Machek
2006-06-05 15:31 ` David Brownell
2006-06-05 16:36 ` [patch/rft 2.6.17-rc5-git 0/6] PM_EVENT_PRETHAW David Brownell
2006-06-05 16:36 ` [patch/rft 2.6.17-rc5-git 1/6] fix broken/dubious driver suspend() methods David Brownell
[not found] ` <20060530191140.GA4017@ucw.cz>
2006-06-07 0:53 ` David Brownell
2006-06-05 16:37 ` [patch/rft 2.6.17-rc5-git 2/6] add PM_EVENT_PRETHAW David Brownell
2006-05-30 19:17 ` Pavel Machek
2006-06-07 1:02 ` David Brownell
2006-06-05 16:38 ` [patch/rft 2.6.17-rc5-git 3/6] PM_EVENT_PRETHAW, handle in IDE and PCI David Brownell
2006-05-30 19:21 ` Pavel Machek
2006-06-07 0:51 ` David Brownell
2006-06-05 16:38 ` [patch/rft 2.6.17-rc5-git 4/6] PM_EVENT_PRETHAW for various graphics cards David Brownell
2006-05-30 19:30 ` Pavel Machek
2006-06-07 1:24 ` David Brownell
2006-06-07 18:57 ` PM docs and API? bsmith
2006-06-07 22:58 ` David Brownell
2006-06-05 16:38 ` [patch/rft 2.6.17-rc5-git 5/6] PM_EVENT_PRETHAW, handle for USB David Brownell
2006-06-05 16:38 ` [patch/rft 2.6.17-rc5-git 6/6] PM_EVENT_PRETHAW, issue from PM core David Brownell
2006-05-30 19:28 ` Pavel Machek
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