On Mon, Jul 09, 2001 at 02:39:46PM +0300, Ville Nummela wrote:
> Ville Nummela <ville.nummela@mail.necsom.com> writes:
>
> > Jeff Garzik <jgarzik@mandrakesoft.com> writes:
> > > As I hacked around to fix this, I noticed Andrea's ksoftirq patch
> > > already fixed this. So, I decided to look over his patch instead.
> > I tried that patch too, but with not so good results: The code LOOKS good to
> > mee too, but for some reason it still seems to stuck in looping the tasklet
> > code only. btw. I'm trying this on PPC, it might have something to do with
> > that.. :)
>
> Stupid is stupid does.. I had used Adreas patch for a wrong kernel version,
> and therefore the patch hadn't quite succeeded. The right patch works well
> on the PPC too :-)
btw, I tell to you too, if you have an SMP you also need to fix this plain
scheduler cpu affinity bug or you can deadlock at boot when ksoftirqd
kicks in:
ftp://ftp.us.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4/2.4.7pre3aa1/00_cpus_allowed-1
attached here too:
--- 2.4.4pre3aa/kernel/sched.c.~1~ Sat Apr 14 15:49:11 2001
+++ 2.4.4pre3aa/kernel/sched.c Sun Apr 15 18:31:14 2001
@@ -765,6 +765,8 @@
goto repeat_schedule;
still_running:
+ if (!(prev->cpus_allowed & (1UL << this_cpu)))
+ goto still_running_back;
c = goodness(prev, this_cpu, prev->active_mm);
next = prev;
goto still_running_back;
Andrea
-
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This archive was generated by hypermail 2b29 : Sun Jul 15 2001 - 21:00:09 EST