user/sven/linux.git/kernel/power, branch v3.18.31

PM / sleep: Increase default DPM watchdog timeout to 60

2015-07-05T14:12:49Z

[ Upstream commit fff3b16d2754a061a3549c4307a186423a0128fd ] Many harddisks (mostly WD ones) have firmware problems and take too long, more than 10 seconds, to resume from suspend. And this often exceeds the default DPM watchdog timeout (12 seconds), resulting in a kernel panic out of sudden. Since most distros just take the default as is, we should give a bit more safer value. This patch increases the default value from 12 seconds to one minute, which has been confirmed to be long enough for such problematic disks. Link: https://bugzilla.kernel.org/show_bug.cgi?id=91921 Fixes: 70fea60d888d (PM / Sleep: Detect device suspend/resume lockup and log event) Cc: 3.13+ # 3.13+ Signed-off-by: Takashi Iwai Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin

Revert "PM / hibernate: avoid unsafe pages in e820 reserved regions"

2015-04-24T21:14:04Z

[ Upstream commit f82daee49c09cf6a99c28303d93438a2566e5552 ] Commit 84c91b7ae07c (PM / hibernate: avoid unsafe pages in e820 reserved regions) is reported to make resume from hibernation on Lenovo x230 unreliable, so revert it. We will revisit the issue the commit in question was supposed to fix in the future. Link: https://bugzilla.kernel.org/show_bug.cgi?id=96111 Reported-by: rhn Cc: 3.17+ # 3.17+ Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin

PM / sleep: Fix entering suspend-to-IDLE if no freeze_oops is set

2014-11-08T21:30:05Z

If no freeze_ops is set, trying to enter suspend-to-IDLE will cause a nice oops in platform_suspend_prepare_late(). Add respective checks to platform_suspend_prepare_late() and platform_resume_early() functions. Fixes: a8d46b9e4e48 (ACPI / sleep: Rework the handling of ACPI GPE wakeup ...) Signed-off-by: Dmitry Eremin-Solenikov Signed-off-by: Rafael J. Wysocki

PM / Sleep: fix recovery during resuming from hibernation

2014-10-27T17:42:26Z

If a device's dev_pm_ops::freeze callback fails during the QUIESCE phase, we don't rollback things correctly calling the thaw and complete callbacks. This could leave some devices in a suspended state in case of an error during resuming from hibernation. Signed-off-by: Imre Deak Cc: All applicable Signed-off-by: Rafael J. Wysocki

Merge branch 'freezer'

2014-10-23T21:02:45Z

* freezer: PM / freezer: Clean up code after recent fixes PM: convert do_each_thread to for_each_process_thread OOM, PM: OOM killed task shouldn't escape PM suspend freezer: remove obsolete comments in __thaw_task() freezer: Do not freeze tasks killed by OOM killer

Merge branch 'pm-qos'

2014-10-23T21:02:36Z

* pm-qos: PM / QoS: Add PM_QOS_MEMORY_BANDWIDTH class

PM / freezer: Clean up code after recent fixes

2014-10-22T20:47:32Z

Clean up the code in process.c after recent changes to get rid of unnecessary labels and goto statements. Signed-off-by: Rafael J. Wysocki

PM: convert do_each_thread to for_each_process_thread

2014-10-21T21:44:21Z

as per 0c740d0afc3b (introduce for_each_thread() to replace the buggy while_each_thread()) get rid of do_each_thread { } while_each_thread() construct and replace it by a more error prone for_each_thread. This patch doesn't introduce any user visible change. Suggested-by: Oleg Nesterov Signed-off-by: Michal Hocko Signed-off-by: Rafael J. Wysocki

OOM, PM: OOM killed task shouldn't escape PM suspend

2014-10-21T21:44:21Z

PM freezer relies on having all tasks frozen by the time devices are getting frozen so that no task will touch them while they are getting frozen. But OOM killer is allowed to kill an already frozen task in order to handle OOM situtation. In order to protect from late wake ups OOM killer is disabled after all tasks are frozen. This, however, still keeps a window open when a killed task didn't manage to die by the time freeze_processes finishes. Reduce the race window by checking all tasks after OOM killer has been disabled. This is still not race free completely unfortunately because oom_killer_disable cannot stop an already ongoing OOM killer so a task might still wake up from the fridge and get killed without freeze_processes noticing. Full synchronization of OOM and freezer is, however, too heavy weight for this highly unlikely case. Introduce and check oom_kills counter which gets incremented early when the allocator enters __alloc_pages_may_oom path and only check all the tasks if the counter changes during the freezing attempt. The counter is updated so early to reduce the race window since allocator checked oom_killer_disabled which is set by PM-freezing code. A false positive will push the PM-freezer into a slow path but that is not a big deal. Changes since v1 - push the re-check loop out of freeze_processes into check_frozen_processes and invert the condition to make the code more readable as per Rafael Fixes: f660daac474c6f (oom: thaw threads if oom killed thread is frozen before deferring) Cc: 3.2+ # 3.2+ Signed-off-by: Michal Hocko Signed-off-by: Rafael J. Wysocki

Merge branch 'pm-domains'

2014-10-06T23:18:12Z

* pm-domains: (32 commits) PM / Domains: Rename cpu_data to cpuidle_data PM / Domains: Move dev_pm_domain_attach|detach() to pm_domain.h PM / Domains: Remove legacy API for adding devices through DT PM / Domains: Add genpd attach/detach callbacks PM / Domains: add debugfs listing of struct generic_pm_domain-s ACPI / PM: Convert acpi_dev_pm_detach() into a static function ARM: exynos: Move to generic PM domain DT bindings amba: Add support for attach/detach of PM domains spi: core: Convert to dev_pm_domain_attach|detach() mmc: sdio: Convert to dev_pm_domain_attach|detach() i2c: core: Convert to dev_pm_domain_attach|detach() drivercore / platform: Convert to dev_pm_domain_attach|detach() PM / Domains: Add APIs to attach/detach a PM domain for a device PM / Domains: Add generic OF-based PM domain look-up ACPI / PM: Assign the ->detach() callback when attaching the PM domain PM / Domains: Add a detach callback to the struct dev_pm_domain PM / domains: Spelling s/domian/domain/ PM / domains: Keep declaration of dev_power_governors together PM / domains: Remove default_stop_ok() API drivers: sh: Leave disabling of unused PM domains to genpd ...