[linux-pm] [PATCH 09/13] PM: wakelock: Abort task freezing if a wake lock is held.

[Arve Hjønnevåg]

On Thu, Feb 5, 2009 at 2:02 AM, Pavel Machek <pavel at ucw.cz> wrote:
> ...so I guess I'll wait for extended description.
    PM: wakelock: Abort task freezing if a wakelock is locked.

    If a wakelock is locked, suspend will fail anyway. Since try_to_freeze_tasks
    can take up to 20 seconds to complete or fail, aborting as soon as someone
    locks a wakelock (e.g. from an interrupt handler) improves the worst case
    wakeup latency.

    On an older kernel where task freezing could fail for processes attached
    to a debugger, this fixed a problem where the device sometimes hung for
    20 seconds before the screen turned on.


-- 
Arve Hjønnevåg