linux/kernel/power, branch v2.6.26

Merge branches 'release', 'acpica', 'bugzilla-10224', 'bugzilla-9772', 'bugzilla-9916', 'ec', 'eeepc', 'idle', 'misc', 'pm-legacy', 'sysfs-links-2.6.26', 'thermal', 'thinkpad' and 'video' into release

2008-04-30T17:58:00Z

PM/gxfb: add hook to PM console layer that allows disabling of suspend VT switch

2008-04-28T15:58:36Z

Prior to suspend, we allocate and switch to a new VT; after suspend, we switch back to the original VT. This can be slow, and is completely unnecessary if the framebuffer we're using can restore video properly. This adds a hook that allows drivers to select whether or not to do this vt switch, and changes the gxfb driver to call this hook. It also adds a module param to gxfb to allow controlling of the vt switch (defaulting to no switch). (Note: I'm not convinced that console_sem is the best way to protect this, but we should probably have some form of locking..) [akpm@linux-foundation.org: build fix] Signed-off-by: Andres Salomon Cc: Jordan Crouse Cc: "Antonino A. Daplas" Cc: Pavel Machek Cc: "Rafael J. Wysocki" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

PM: Remove legacy PM

2008-04-15T07:19:07Z

AFAICT pm_send_all is a nop when noone uses pm_register... Hmm.. can we just force CONFIG_PM_LEGACY=n, and see what happens? Or maybe this is better idea? It may break build somewhere, but it should be easy to fix... (it builds here, i386 and x86-64). Signed-off-by: Pavel Machek Acked-by: Ralf Baechle Signed-off-by: Rafael J. Wysocki Signed-off-by: Len Brown

Merge branches 'release' and 'doc' into release

2008-03-13T05:59:53Z

documentation: Move power-related files to Documentation/power/

2008-03-12T22:10:51Z

Move 00-INDEX entries to power/00-INDEX (and add entry for pm_qos_interface.txt). Update references to moved filenames. Fix some trailing whitespace. Signed-off-by: Randy Dunlap Signed-off-by: Len Brown

Hibernation: Fix mark_nosave_pages()

2008-03-12T03:15:55Z

There is a problem in the hibernation code that triggers on some NUMA systems on which pfn_valid() returns 'true' for some PFNs that don't belong to any zone. Namely, there is a BUG_ON() in memory_bm_find_bit() that triggers for PFNs not belonging to any zone and passing the pfn_valid() test. On the affected systems it triggers when we mark PFNs reported by the platform as not saveable, because the PFNs in question belong to a region mapped directly using iorepam() (i.e. the ACPI data area) and they pass the pfn_valid() test. Modify memory_bm_find_bit() so that it returns an error if given PFN doesn't belong to any zone instead of crashing the kernel and ignore the result returned by it in mark_nosave_pages(), while marking the "nosave" memory regions. This doesn't affect the hibernation functionality, as we won't touch the PFNs in question anyway. http://bugzilla.kernel.org/show_bug.cgi?id=9966 . Signed-off-by: Rafael J. Wysocki Signed-off-by: Len Brown

freezer vs stopped or traced

2008-03-04T15:59:54Z

This changes the "freezer" code used by suspend/hibernate in its treatment of tasks in TASK_STOPPED (job control stop) and TASK_TRACED (ptrace) states. As I understand it, the intent of the "freezer" is to hold all tasks from doing anything significant. For this purpose, TASK_STOPPED and TASK_TRACED are "frozen enough". It's possible the tasks might resume from ptrace calls (if the tracer were unfrozen) or from signals (including ones that could come via timer interrupts, etc). But this doesn't matter as long as they quickly block again while "freezing" is in effect. Some minor adjustments to the signal.c code make sure that try_to_freeze() very shortly follows all wakeups from both kinds of stop. This lets the freezer code safely leave stopped tasks unmolested. Changing this fixes the longstanding bug of seeing after resuming from suspend/hibernate your shell report "[1] Stopped" and the like for all your jobs stopped by ^Z et al, as if you had freshly fg'd and ^Z'd them. It also removes from the freezer the arcane special case treatment for ptrace'd tasks, which relied on intimate knowledge of ptrace internals. Signed-off-by: Roland McGrath Signed-off-by: Linus Torvalds

PM: Introduce PM_EVENT_HIBERNATE callback state

2008-02-23T18:40:04Z

During the last step of hibernation in the "platform" mode (with the help of ACPI) we use the suspend code, including the devices' ->suspend() methods, to prepare the system for entering the ACPI S4 system sleep state. But at least for some devices the operations performed by the ->suspend() callback in that case must be different from its operations during regular suspend. For this reason, introduce the new PM event type PM_EVENT_HIBERNATE and pass it to the device drivers' ->suspend() methods during the last phase of hibernation, so that they can distinguish this case and handle it as appropriate. Modify the drivers that handle PM_EVENT_SUSPEND in a special way and need to handle PM_EVENT_HIBERNATE in the same way. These changes are necessary to fix a hibernation regression related to the i915 driver (ref. http://lkml.org/lkml/2008/2/22/488). Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Tested-by: Jeff Chua Signed-off-by: Linus Torvalds

Hibernation: Handle DEBUG_PAGEALLOC on x86

2008-02-21T07:15:28Z

Make hibernation work with CONFIG_DEBUG_PAGEALLOC set on x86, by checking if the pages to be copied are marked as present in the kernel mapping and temporarily marking them as present if that's not the case. No functional modifications are introduced if CONFIG_DEBUG_PAGEALLOC is unset. Signed-off-by: Rafael J. Wysocki Signed-off-by: Len Brown

PM: documentation cleanups

2008-02-07T06:27:17Z

Signed-off-by: Pavel Machek Acked-by: Rafael J. Wysocki Signed-off-by: Len Brown