http://bugzilla.kernel.org/show_bug.cgi?id=13533
Bjorn Helgaas <bjorn.helg...@hp.com> changed:
What |Removed |Added
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CC| |bjorn.helg...@hp.com
--- Comment #14 from Bjorn Helgaas <bjorn.helg...@hp.com> 2009-06-23 21:57:39
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Here's the actual deadlock for future reference:
<user removes battery, platform generates system-level notify>
acpi_bus_notify
blocking_notifier_call_chain
acpi_dock_notifier_call
acpi_os_hotplug_execute(acpi_dock_deferred_cb, ...)
__acpi_os_execute(..., acpi_dock_deferred_cb, ...)
schedule_work(<acpi_dock_deferred_cb>)
queue_work(keventd_wq, <acpi_dock_deferred_cb>)
<acpi_dock_deferred_cb queued for execution in keventd_wq>
worker_thread(keventd_wq)
acpi_os_execute_hp_deferred
acpi_dock_deferred_cb
dock_notify
hotplug_dock_devices
dock_remove_acpi_device
acpi_bus_trim
acpi_bus_remove
device_release_driver
acpi_device_remove
acpi_battery_remove
sysfs_remove_battery
power_supply_unregister
flush_scheduled_work
flush_workqueue(keventd_wq)
Now we're waiting for keventd_wq to be flushed, but it won't be
considered flushed until acpi_os_execute_hp_deferred() completes.
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