[mpeg2] Re: Fix for kernel-freezes

[Marcel van der Boom <marcel@hsdev.com>]

I'm with you.

Good to see that development is still active in the Dutch corner

Marcel


Bram Stolk wrote:

>hi,
>
>When using the kfir module, you will have noticed
>that the kernel freezes regularly for a few seconds or so.
>Most noticably during module load, and during device closing.
>
>(Try e.g. switching virtual consoles when loading kfir.o:
> it will not work, as ALL system services are halted during 
> this time)
>
>This is because the kernel module issues mdelay operations.
>These are evil operations, and should always be avoided if
>possible.
>
>What's worse... it turns out that most of these delays
>are not necessary, at least in my setup.
>
>For instance, when redefining 'Sleep' to return without
>delay, has had *no* impact on the functionality of my BMK
>mpeg encoder card.
>
>To improve the responsiveness of the system, I advice you to
>redefine Sleep() in kfir.o as:
>static inline void Sleep(int i)
>{
>        return;
>}
>
>Next, I propose a carefull examination of all remaining
>mdelay() ops, and see if the can be removed, or else lowered.
>This can be a labourous task, so if we divide the workload
>among the members of this mailinglist, we can probably 
>empirically designate those mdelays that are actually needed.
>
>So... who's with me?
>
>  Bram
>
>
>
>

-- 
Marcel van der Boom
HS-Development BV
Kwartiersedijk 14B
Fijnaart, The Netherlands
Tel. : 0168-468822
Fax. : 0168-468823
Email: marcel@hsdev.com