From: Philippe Gerum <rpm@xenomai.org>
To: Stelian Pop <stelian@domain.hid>
Cc: Jan Kiszka <jan.kiszka@domain.hid>, Xenomai-core@domain.hid
Subject: Re: [Xenomai-core] [PATCH] fix hw-timer setup/cleanup for i386
Date: Sat, 13 Oct 2007 18:35:21 +0200 [thread overview]
Message-ID: <1192293321.6804.4.camel@domain.hid> (raw)
In-Reply-To: <20071013161211.GB24909@domain.hid>
On Sat, 2007-10-13 at 18:12 +0200, Stelian Pop wrote:
> On Sat, Oct 13, 2007 at 04:42:27PM +0200, Jan Kiszka wrote:
>
> > Where do you get ENODEV? On nucleus startup? Please provide
> > /proc/timer_list output of the working and non-working setups.
>
> It turns out that I had the Linux NMI watchdog enabled (nmi_watchdog=1
> on the command line) and this was causing the -ENODEV problems. Once
> removed, I'm able to boot and successfully run all configurations: UP,
> UP + APIC, UP + APIC + IO_APIC, SMP. And the latencies are back to normal.
>
The clock event layer turns off the APIC timer when the NMI watchdog is
set to use the IO-APIC. Unfortunately, using nmi_watchdog=2 may just not
work at all on broken hardware with recent kernels (like the one I have
just in front of me...).
> Maybe we should detect that the NMI watchdog is enabled and issue a
> warning message, this would save others a few hours and many kernel
> builds...
There is work in progress on the NMI issue, but this message will likely
appear until we've fixed this properly.
>
> This is with your timer cleanup patch, of course.
>
> > PS: For unknown reasons your mails don't make it to my web.de address,
> > only to the list. Do you get any error messages?
>
> I did get one saying:
> <jan.kiszka@domain.hid>: host mx-ha02.web.de[217.72.192.188] refused to talk to me:
> 554 Transaction failed. For explanation visit
> http://freemail.web.de/reject/?ip=88.191.70.230
>
> I didn't investigate yet what's happenning.
>
--
Philippe.
next prev parent reply other threads:[~2007-10-13 16:35 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-11 20:47 [Xenomai-core] [PATCH] fix hw-timer setup/cleanup for i386 Jan Kiszka
2007-10-12 8:58 ` Stelian Pop
2007-10-12 9:14 ` Jan Kiszka
2007-10-12 11:00 ` Stelian Pop
2007-10-12 11:15 ` Jan Kiszka
2007-10-12 13:19 ` Stelian Pop
2007-10-12 13:39 ` Jan Kiszka
2007-10-12 13:41 ` Philippe Gerum
2007-10-12 14:26 ` Stelian Pop
2007-10-12 19:53 ` Jan Kiszka
2007-10-12 20:22 ` Stelian Pop
2007-10-12 21:51 ` Stelian Pop
2007-10-12 21:58 ` Philippe Gerum
2007-10-13 14:28 ` Stelian Pop
2007-10-13 14:42 ` Jan Kiszka
2007-10-13 16:12 ` Stelian Pop
2007-10-13 16:35 ` Philippe Gerum [this message]
2007-10-13 16:38 ` Jan Kiszka
2007-10-13 20:55 ` Stelian Pop
2007-10-13 14:32 ` Stelian Pop
2007-10-12 9:00 ` Jan Kiszka
2007-10-12 9:16 ` Philippe Gerum
2007-10-12 9:47 ` Jan Kiszka
2007-10-12 12:48 ` Philippe Gerum
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