From: Andreas Oberritter <obi@linuxtv.org>
To: Devin Heitmueller <devin.heitmueller@gmail.com>
Cc: linux-dvb <linux-dvb@linuxtv.org>
Subject: Re: [linux-dvb] Power management and dvb framework
Date: Sun, 14 Sep 2008 18:03:28 +0200 [thread overview]
Message-ID: <48CD35D0.5010907@linuxtv.org> (raw)
In-Reply-To: <412bdbff0809140550w7c6bdeaag567039de5af590db@mail.gmail.com>
Devin Heitmueller wrote:
> On Sat, Sep 13, 2008 at 11:21 PM, Andreas Oberritter <obi@linuxtv.org> wrote:
>> The sleep callback gets called automatically some seconds after the last
>> user closed the frontend device.
>
> Great. That sounds like the ideal place to bring everything down. Is
> that scheduled via a timer?
No. I just saw that the timeout defaults to 0 seconds now. For each
frontend a kernel thread gets started when open() is called. After the
call to close(), the thread will be stopped after 'dvb_shutdown_timeout'
seconds. It compares the jiffies value to accomplish that. See
dvb_frontend_is_exiting() in dvb_frontend.c.
> And does it still get called if the
> frontend gets reopened before the timer expires?
No, and the old kernel thread will be reused.
Regards,
Andreas
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prev parent reply other threads:[~2008-09-14 16:03 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-13 21:41 [linux-dvb] Power management and dvb framework Devin Heitmueller
2008-09-13 21:53 ` Steven Toth
2008-09-13 22:28 ` Devin Heitmueller
2008-09-14 3:21 ` Andreas Oberritter
2008-09-14 12:50 ` Devin Heitmueller
2008-09-14 16:03 ` Andreas Oberritter [this message]
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