hi Alan:
2015-05-27 22:40 GMT+08:00 Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>:
> On Wed, 27 May 2015, yoma sophian wrote:
>
>> After reading the kernel power document, freezing-of-tasks.txt , can I
>> get the below conclusion:
>> if I put my thread in freezable, it will get frozen automatically
>> whenever the system goes in to suspend or hibernate.
>
> It's not entirely automatic. Your thread has to call try_to_freeze()
> at appropriate spots. Of course, if your thread is a work queue then
> the workqueue core will do that for you.
after tracing more kernel based your guide, may I get below conclusion:
if I try to create a thread that will do the IO
1. create the thread, with set_freezable, and call try_to_freeze() at
appropriate spots.
2. hook my thread on system_freezable_wq
such as calling queue_delayed_work(system_freezable_wq, &mythread, intv)
or mod_delayed_work((system_freezable_wq, &mythread, intv)
is hub_thread the 1st kind?
if Yes, where it try_to_freeze?
And why not make hub_thread as above #2 kind?
appreciate your kind help,
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