El Tue, Jan 20, 2009 at 01:17:11PM +0530 mayank rana ha dit: > I am looking for some particular case here. > Here is the scenario: > 1. I have one ISR which is getting called while I am receiving interrupts. > 2. Now I have one more Kernel Code Function which is as critical as this > ISR Execution. Is there any way to raise the Kernel Code function priority > as ISR level.i.e. ISR is running in the context of Interrupt which is high > priority, while the Kernel Code Function is running in Thread Context > which is obviously having somewhat less priority. Do we have any > mechnsm which allows us to raise the Kernel Code Function priority from > Thread Context to Interrupt Context while executing it.
this is possible with the RT patch: http://rt.wiki.kernel.org git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-rt.git http://www.kernel.org/pub/linux/kernel/projects/rt/ the patch converts interrupts into preemptable kernel threads. you could assign your critical thread a higher priority than the ISRs -- Matthias Kaehlcke Embedded Linux Engineer Barcelona For to be free is not merely to cast off one's chains, but to live in a way that respects and enhances the freedom of others (Nelson Mandela) .''`. using free software / Debian GNU/Linux | http://debian.org : :' : `. `'` gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `- -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecar...@nl.linux.org Please read the FAQ at http://kernelnewbies.org/FAQ
