[LAD] irq priorities howto posted

Jörn Nettingsmeier nettings at folkwang-hochschule.de
Tue Nov 3 17:16:38 UTC 2009

hi *!

thanks to contributions from a number of ffado folks) (notably stefan
richter, kernel firewire developer, the irq priorities howto in the
ffado wiki at
should be in a usable shape.
it's split in two parts: the first one shows how to tweak IRQ priorities
manually (because it's useful to know, if a bit tedious), and the second
shows how to offload the grunt work to rui's rtirq script.

however, the general hairiness of messing with kernel thread priorities
on an rt kernel demands some more eyeballs on this.
i'd welcome user reports and suggestions/corrections from people with
in-depth kernel knowledge.

no need to cross-post your contributions (unless you want to discuss
them widely), i will collate all suggestions and integrate them into the
wiki. of course, if you are willing to take the trouble to sign up on
the ffado homepage (http://ffado.org/?q=user/register), you are welcome
to work on the wiki directly.

this information currently resides on ffado.org, because irq tuning is a
hot topic for users of firewire audio devices. however, the plan is to
move the relevant information upstream into the kernel rt wiki once it'
has seen some more review.

i'm not currently on the rt users list - if anyone is, feel free to
forward this message. i'd appreciate cc:s to my private address in that



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