[linux-audio-user] Which kernel for low latency

[Glenn McCord]

martijn wrote:

>Once upon a Wed, Jan 21 2004, Glenn McCord hit keys in the following order:
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>>I modified modprobe.conf but it's ignored. When I restart the machine 
>>the line I added disappears anyway when it does an update-modules. 
>>modprobe.conf has a comment saying I should modify modules.conf instead 
>>but that doesn't do any good either.
>>    
>>
>
>Ahhh, got confused again, what is it with me and january. modules.conf is
>indeed the place to add the option. modprobe.conf is the one thats used by
>modprobe but it's the output from generate-modprobe.conf, hence my confusion.
>
>The command "modprobe realtime allcaps=1" is another way to supply the option.
>

Okay, it's all good now. I'd compiled the kernel again (from scratch) 
and forgot to put in the security options in.

thanks.

>
>  
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>>replace
>>#define CAP_INIT_EFF_SET    to_cap_t(~0 & ~CAP_TO_MASK(CAP_SETPCAP))
>>with
>>#define CAP_INIT_EFF_SET    to_cap_t(~0)
>>
>>Below this line, there should be another line that should looks like:
>>#define CAP_INIT_INH_SET    to_cap_t(0)
>>so replace it with
>>#define CAP_INIT_INH_SET    to_cap_t(~0)
>>    
>>
>
>Weird, i did the same thing, but it didn't work for me, if i remember
>correctly. But then again, maybe my problem was that it compiled but didn't
>actually give me any realtime priority. Like you describe i had continues
>x-runs in the beginning. Now the only time i get x-runs is when an idle program
>gets pulled back in focus, or when there's a lot of network activity.
>
>
>martijn.
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