On Mon, 1 Oct 2007, Andi Kleen wrote:
> On Monday 01 October 2007 20:54:21 Thomas Gleixner wrote:
> > On Mon, 1 Oct 2007, Andi Kleen wrote:
> >
> > > On Wednesday 26 September 2007 20:03:12 David Bahi wrote:
> > > > Thanks to tglx and ghaskins for all the help in tracking down a very
> > > > early nmi_watchdog crash on certain x86_64 machines.
> > >
> > > The patch is totally bogus. irq 0 doesn't say anything about whether
> > > the current CPU still works or not. You always need some local
> > > interrupt. This basically disables the NMI watchdog for the non boot CPUs.
> > >
> > > It's even wrong on i386 -- i wonder how that broken patch
> > > made it in there. I'll remove it there.
> >
> > Right, it's wrong for the broadcast case, but simply removing it will
> > trigger false positives on the CPU which runs the broadcast timer. I
> > fix this proper.
>
> I already did this here by checking for cpu != 0. But it also needs either tracking
> or forbidding migrations of irq 0. I can take care of the patch.
I was thinking about the same fix. On i386 we already have the irq
migration / balancing of irq 0 disabled. That's why we setup IRQ0 with
IRQ_NOBALANCING.
tglx
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
