Re: [patch] increase spinlock-debug looping timeouts (write_lockand NMI)

From: Andrew Morton
Date: Thu Jun 22 2006 - 01:57:14 EST


On Wed, 21 Jun 2006 22:45:49 -0700 (PDT)
Dave Olson <olson@xxxxxxxxxxxx> wrote:

> On Tue, 20 Jun 2006, Andrew Morton wrote:
> | > Intended to be more or less stock fc4 but with CONFIG_PCI_MSI=y and
> | > 2.6.17-based patch so the 8131 MSI quirk isn't enabled.
> | >
> | > >From the config file:
> | > CONFIG_DEBUG_SPINLOCK=y
> | > CONFIG_DEBUG_SPINLOCK_SLEEP=y
> |
> | OK, I goofed again.
> |
> | It would be super-interesting to know whether CONFIG_DEBUG_SPINLOCK=n
> | improves things.
>
> It does. No stalls, hangs, or nmi's in several hours of running the
> test that previously failed on almost every run (with long stalls, system
> hangs, or NMI watchdogs), on the same hardware.
>
> I made no other changes to the kernel config than turning both of
> the above off.
>

Well isn't that interesting, thanks. We have our 2.6.17.x patch.

Now we need to work out why.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/