[vdr] Re: Exit state handling in runvdr

[Jan Ekholm <chakie@infa.abo.fi>]

On Thu, 28 Aug 2003, Klaus Schmidinger wrote:

>Jan Ekholm wrote:
>> Well, I must agree. In the past I've missed a lot of recordings just
>> because VDR died with buffer overflows sometimes during the day. So when
>> the recording was supposed to start it was dead. I used to always check
>> the machine before each recording to see that it was alive and well, but
>> that defeated the whole idea of unattended recordings. I've also never
>>
>> Actually, a ring buffer overflow doesn't exit VDR here, it just sits
>> there. Shouldn't the watchdog restart VDR when it's died or shouldn't VDR
>> itself exit when it has reached a situation (buffer overflow) from which
>> it can't recover without a restart?
>
>When VDR dies because of a segfault or similar events, runvdr should already
>do a restart (at least it does here).
>
>The watchdog makes VDR exit with a restart condition as soon as the main
>program loop is no longer processed, maybe because the program is stuck
>somewhere.

Isn't the ring buffer overflow a restart condition? Or a reason to exit
and unload/reload the DVB drivers? As far as I can see there is nothing
that can be done after the overflows. VDR may react to input, but it's
never displayed anything anymore. Once the overflow comes it's like
instant lobotomy, VDR is alive but not anyway alive. :)

>If you want additional "emergency exists" when buffer overflows or things
>like that happen, you can just implement the necessary call at the right place.
>But be prepared for lots of complaints from people who are already complaining
>about the "emergency exists" VDR does as it is now ;-).

Well, I think I personally rather have one exit too much than not. A
restart isn't so bad, an internal "half crash" where VDR can't really
proceed is worse.

-- 

              Many an ancient lord's last words had been:
         "You can't kill me because I've got magic aaargh...."
                                      -- Terry Pratchett, Interesting Times


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