[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <19f34abd0808240448w5facaee2gec77662c14b9364f@mail.gmail.com>
Date: Sun, 24 Aug 2008 13:48:47 +0200
From: "Vegard Nossum" <vegard.nossum@...il.com>
To: "Mikael Pettersson" <mikpe@...uu.se>
Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
tglx@...utronix.de
Subject: Re: [BUG] get_rtc_time() triggers NMI watchdog in hpet_rtc_interrupt()
On Sun, Aug 24, 2008 at 12:32 PM, Mikael Pettersson <mikpe@...uu.se> wrote:
> > I also just got this during shutdown:
> >
> > Syncing hardware clock to system time BUG: NMI Watchdog detected
> > LOCKUP on CPU0, ip c011d922, registers:
> > Pid: 4181, comm: hwclock Not tainted (2.6.27-rc3-00464-g1fca254-dirty #42)
[...]
> See my reply in the thread following Ingo's patch
> <http://lkml.org/lkml/2008/8/23/158>. I've only seen the lockup
> while hwclock was setting or flushing the system time, so I suspect
> broken interaction between the hpet rtc emulation and the rtc
> user-space interface.
Oops, I picked the wrong thread :-)
Anyway, I guess it wouldn't be too hard to make a test cast by running
"hwclock" (or the corresponding initscript) in a tight loop? (Sorry, I
am not able to test this myself at the moment). That would make it
easier to test the patch too, I guess. Maybe something like:
$ while true; do /etc/init.d/ntpdate up; /etc/init.d/ntpdate down; done
(At least "ntpdate" is the one that runs hwclock for me on F9.)
I will try this later unless you beat me to it :-)
Thanks,
Vegard
--
"The animistic metaphor of the bug that maliciously sneaked in while
the programmer was not looking is intellectually dishonest as it
disguises that the error is the programmer's own creation."
-- E. W. Dijkstra, EWD1036
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists