On 1 October 2011 17:25, Alexander Motin <[email protected]> wrote: > Use of critical section in cpu_idle() from the beginning was based on > number of assumptions about filter interrupt handler's limitations.
[snip] > So, if you really need to use callout() in interrupt filter, we could > disable interrupts before calling cpu_idleclock(), as you have told. But > that is only a partial solution and you should be ready for the second > half of the problems. Depending on your needs I am not sure it will > satisfy you. I'm not using callouts from a swi in ath(4), at least not yet. I haven't yet gone over all the drivers in sys/dev/ to see if any of them are actually doing this. I was just making an observation. I may have to go digging into how Linux manages to do this without having the occasional interrupt latency issue that FreeBSD/MIPS is. For all I know, Linux has the same issue on the mips32 platforms that I'm currently testing on. Adrian _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[email protected]"
