From: Rob Landley <rob@landley.net>
To: Michael-Luke Jones <mlj28@cam.ac.uk>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>,
LKML <linux-kernel@vger.kernel.org>, Pavel Machek <pavel@ucw.cz>,
pm list <linux-pm@lists.linux-foundation.org>
Subject: Re: [RFC][PATCH -mm 3/3] PM: Disable _request_firmware before hibernation/suspend
Date: Tue, 29 May 2007 16:41:41 -0400 [thread overview]
Message-ID: <200705291641.43476.rob@landley.net> (raw)
In-Reply-To: <6BD5252F-96CD-49D9-86C7-18115294D913@cam.ac.uk>
On Sunday 27 May 2007 4:45 pm, Michael-Luke Jones wrote:
> (Slightly OT: A particularly nasty race is when an initramfs
> userspace is present, but firmware loading cannot occur because init
> has not run, so proc hasn't been mounted, so a hotplug event handler
> cannot be registered, despite the fact that the firmware is sitting
> on the ramdisk mounted correctly...)
I believe that the current functionality is that /sbin/hotplug is the default.
I think that if there is one in initramfs, it'll get called as a usermode
helper, even before init has run. (If it needs /proc /sys or /dev, setting
it up properly is its problem, but not an insurmountable one.)
I remember discussion of this a while back, and that it was indeed
intentional. I dunno if anybody's actually tried it.
Rob
WARNING: multiple messages have this Message-ID (diff)
From: Rob Landley <rob@landley.net>
To: Michael-Luke Jones <mlj28@cam.ac.uk>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
pm list <linux-pm@lists.linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
Matthew Garrett <mjg59@srcf.ucam.org>,
Nigel Cunningham <nigel@nigel.suspend2.net>,
Pavel Machek <pavel@ucw.cz>,
Alan Stern <stern@rowland.harvard.edu>,
Oliver Neukum <oliver@neukum.org>
Subject: Re: [RFC][PATCH -mm 3/3] PM: Disable _request_firmware before hibernation/suspend
Date: Tue, 29 May 2007 16:41:41 -0400 [thread overview]
Message-ID: <200705291641.43476.rob@landley.net> (raw)
In-Reply-To: <6BD5252F-96CD-49D9-86C7-18115294D913@cam.ac.uk>
On Sunday 27 May 2007 4:45 pm, Michael-Luke Jones wrote:
> (Slightly OT: A particularly nasty race is when an initramfs
> userspace is present, but firmware loading cannot occur because init
> has not run, so proc hasn't been mounted, so a hotplug event handler
> cannot be registered, despite the fact that the firmware is sitting
> on the ramdisk mounted correctly...)
I believe that the current functionality is that /sbin/hotplug is the default.
I think that if there is one in initramfs, it'll get called as a usermode
helper, even before init has run. (If it needs /proc /sys or /dev, setting
it up properly is its problem, but not an insurmountable one.)
I remember discussion of this a while back, and that it was indeed
intentional. I dunno if anybody's actually tried it.
Rob
next prev parent reply other threads:[~2007-05-29 20:41 UTC|newest]
Thread overview: 161+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-27 20:29 [RFC][PATCH -mm 0/3] PM: Hibernation and suspend notifiers Rafael J. Wysocki
2007-05-27 20:30 ` [RFC][PATCH -mm 1/3] " Rafael J. Wysocki
2007-05-28 9:49 ` Nigel Cunningham
2007-05-28 9:49 ` Nigel Cunningham
2007-05-28 13:12 ` Pavel Machek
2007-05-28 13:12 ` Pavel Machek
2007-05-28 17:26 ` Rafael J. Wysocki
2007-05-28 17:26 ` Rafael J. Wysocki
2007-05-28 15:56 ` Alan Stern
2007-05-28 15:56 ` Alan Stern
2007-05-28 17:29 ` Rafael J. Wysocki
2007-05-28 17:29 ` Rafael J. Wysocki
2007-05-29 22:24 ` Rafael J. Wysocki
2007-05-29 22:24 ` Rafael J. Wysocki
2007-05-30 15:37 ` Pavel Machek
2007-05-30 15:37 ` Pavel Machek
2007-05-30 20:44 ` Rafael J. Wysocki
2007-05-30 21:11 ` Rafael J. Wysocki
2007-05-30 22:24 ` Nigel Cunningham
2007-05-30 22:24 ` Nigel Cunningham
2007-05-31 5:44 ` Rafael J. Wysocki
2007-05-31 14:23 ` Pavel Machek
2007-05-31 14:23 ` Pavel Machek
2007-05-31 20:02 ` Rafael J. Wysocki
2007-05-31 20:02 ` Rafael J. Wysocki
2007-05-31 21:56 ` Nigel Cunningham
2007-05-31 21:56 ` Nigel Cunningham
2007-05-31 5:44 ` Rafael J. Wysocki
2007-05-30 22:29 ` Pavel Machek
2007-05-31 5:42 ` Rafael J. Wysocki
2007-05-31 5:42 ` Rafael J. Wysocki
2007-05-30 22:29 ` Pavel Machek
2007-05-30 21:11 ` Rafael J. Wysocki
2007-05-30 20:44 ` Rafael J. Wysocki
2007-05-27 20:30 ` Rafael J. Wysocki
2007-05-27 20:30 ` [RFC][PATCH -mm 2/3] PM: Disable usermode helper before hibernation/suspend Rafael J. Wysocki
2007-05-27 20:30 ` Rafael J. Wysocki
2007-05-28 13:04 ` Pavel Machek
2007-05-28 13:04 ` Pavel Machek
2007-05-27 20:31 ` [RFC][PATCH -mm 3/3] PM: Disable _request_firmware " Rafael J. Wysocki
2007-05-27 20:31 ` Rafael J. Wysocki
2007-05-27 20:45 ` Michael-Luke Jones
2007-05-27 20:45 ` Michael-Luke Jones
2007-05-27 21:55 ` Rafael J. Wysocki
2007-05-27 21:55 ` Rafael J. Wysocki
2007-05-28 13:01 ` Pavel Machek
2007-05-28 13:01 ` Pavel Machek
2007-05-29 20:41 ` Rob Landley [this message]
2007-05-29 20:41 ` Rob Landley
2007-05-27 20:49 ` Matthew Garrett
2007-05-27 21:45 ` Rafael J. Wysocki
2007-05-27 21:45 ` Rafael J. Wysocki
2007-05-27 22:01 ` Matthew Garrett
2007-05-27 22:01 ` Matthew Garrett
2007-05-28 7:44 ` Rafael J. Wysocki
2007-05-28 7:44 ` Rafael J. Wysocki
2007-05-28 16:09 ` Alan Stern
2007-05-28 16:09 ` Alan Stern
2007-05-28 16:12 ` Matthew Garrett
2007-05-28 16:12 ` Matthew Garrett
2007-05-28 16:43 ` Alan Stern
2007-05-28 16:43 ` Alan Stern
2007-05-28 16:54 ` Matthew Garrett
2007-05-28 16:54 ` Matthew Garrett
2007-05-28 20:03 ` Alan Stern
2007-05-28 20:03 ` Alan Stern
2007-05-28 20:57 ` Pavel Machek
2007-05-28 20:57 ` Pavel Machek
2007-05-28 22:29 ` Alan Stern
2007-05-28 22:29 ` Alan Stern
2007-05-29 20:09 ` David Brownell
2007-05-29 20:09 ` [linux-pm] " David Brownell
2007-05-29 20:48 ` Alan Stern
2007-05-29 20:48 ` Alan Stern
2007-06-04 11:00 ` Pavel Machek
2007-06-04 11:00 ` Pavel Machek
2007-06-05 18:45 ` Alan Stern
2007-06-05 20:26 ` Pavel Machek
2007-06-05 20:26 ` Pavel Machek
2007-06-05 18:45 ` Alan Stern
2007-05-28 8:30 ` Nigel Cunningham
2007-05-28 8:30 ` Nigel Cunningham
2007-05-28 11:22 ` Rafael J. Wysocki
2007-05-28 11:22 ` Rafael J. Wysocki
2007-05-27 21:49 ` Kay Sievers
2007-05-27 21:49 ` Kay Sievers
2007-05-27 22:01 ` Rafael J. Wysocki
2007-05-27 22:01 ` Rafael J. Wysocki
2007-05-27 22:04 ` Matthew Garrett
2007-05-27 22:16 ` Kay Sievers
2007-05-28 7:43 ` Rafael J. Wysocki
2007-05-28 7:43 ` Rafael J. Wysocki
2007-05-28 8:48 ` Michael-Luke Jones
2007-05-28 8:48 ` Michael-Luke Jones
2007-05-28 9:06 ` Kay Sievers
2007-05-28 9:06 ` Kay Sievers
2007-05-28 10:26 ` Michael-Luke Jones
2007-05-28 10:26 ` Michael-Luke Jones
2007-05-28 12:01 ` Kay Sievers
2007-05-28 12:01 ` Kay Sievers
2007-05-28 12:07 ` Michael-Luke Jones
2007-05-28 12:07 ` Michael-Luke Jones
2007-05-28 10:41 ` Michael-Luke Jones
2007-05-28 10:41 ` Michael-Luke Jones
2007-05-29 21:19 ` Rob Landley
2007-05-29 21:19 ` Rob Landley
2007-05-29 22:51 ` Rob Landley
2007-05-29 22:51 ` Rob Landley
2007-05-30 19:50 ` Pavel Machek
2007-05-30 19:50 ` Pavel Machek
2007-05-28 11:15 ` Pavel Machek
2007-05-28 11:15 ` Pavel Machek
2007-05-28 11:24 ` Kay Sievers
2007-05-28 11:24 ` Kay Sievers
2007-05-28 11:28 ` Pavel Machek
2007-05-28 11:28 ` Pavel Machek
2007-05-28 11:38 ` Michael-Luke Jones
2007-05-28 11:38 ` Michael-Luke Jones
2007-05-28 11:45 ` Pavel Machek
2007-05-28 11:45 ` [linux-pm] " Pavel Machek
2007-05-28 11:51 ` Kay Sievers
2007-05-28 11:51 ` Kay Sievers
2007-05-28 12:26 ` Michael-Luke Jones
2007-05-28 12:26 ` Michael-Luke Jones
2007-05-28 12:47 ` Kay Sievers
2007-05-28 12:47 ` Kay Sievers
2007-05-28 13:00 ` Pavel Machek
2007-05-28 13:00 ` Pavel Machek
2007-05-28 13:10 ` Michael-Luke Jones
2007-05-28 13:10 ` Michael-Luke Jones
2007-05-28 11:28 ` Rafael J. Wysocki
2007-05-28 11:28 ` Rafael J. Wysocki
2007-05-27 22:16 ` Kay Sievers
2007-05-27 22:04 ` Matthew Garrett
2007-05-27 20:49 ` Matthew Garrett
2007-05-28 13:07 ` Pavel Machek
2007-05-28 13:07 ` Pavel Machek
2007-05-28 15:55 ` Alan Stern
2007-05-28 15:55 ` Alan Stern
2007-05-28 17:43 ` Rafael J. Wysocki
2007-05-28 17:43 ` Rafael J. Wysocki
2007-05-28 20:51 ` Ray Lee
2007-05-28 20:51 ` Ray Lee
2007-05-28 20:59 ` Pavel Machek
2007-05-28 20:59 ` Pavel Machek
2007-06-02 0:41 ` [RFC][PATCH -mm 0/2] PM: Hibernation and suspend notifiers (rev. 2) Rafael J. Wysocki
2007-06-02 0:43 ` [RFC][PATCH -mm 1/2] PM: Introduce hibernation and suspend notifiers Rafael J. Wysocki
2007-06-03 16:41 ` Pavel Machek
2007-06-03 16:41 ` Pavel Machek
2007-06-03 22:38 ` Rafael J. Wysocki
2007-06-03 22:59 ` Pavel Machek
2007-06-04 7:56 ` Rafael J. Wysocki
2007-06-04 7:56 ` Rafael J. Wysocki
2007-06-03 22:59 ` Pavel Machek
2007-06-03 22:38 ` Rafael J. Wysocki
2007-06-02 0:43 ` Rafael J. Wysocki
2007-06-02 0:44 ` [RFC][PATCH -mm 2/2] PM: Disable usermode helper before hibernation and suspend Rafael J. Wysocki
2007-06-02 0:44 ` Rafael J. Wysocki
2007-06-03 16:42 ` Pavel Machek
2007-06-03 16:42 ` Pavel Machek
2007-06-02 0:41 ` [RFC][PATCH -mm 0/2] PM: Hibernation and suspend notifiers (rev. 2) Rafael J. Wysocki
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