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From: Pavel Machek <pavel@ucw.cz>
To: Diego Woitasen <diego@woitasen.com.ar>
Cc: tglx@linutronix.de, linux-kernel@vger.kernel.org,
	Ingo Molnar <mingo@elte.hu>
Subject: Re: BUG: High resolution timer/dynticks bug
Date: Wed, 5 Mar 2008 09:27:31 +0100	[thread overview]
Message-ID: <20080305082731.GA24004@atrey.karlin.mff.cuni.cz> (raw)
In-Reply-To: <20080304230032.GA2967@motherbox.xtech.com.ar>

Hi!
> > > Hi!
> > > 	I have problems when enable dynticks or hrtimers in kernel >=
> > > 	2.6.24. It's easy to reproduce for me, when I enable either,
> > > 	boots the machine, browse the web with Firefox or unplug the
> > > 	power cable (i'm using a notebook) and the kernel freezes. I
> > > 	could get a error message using NMI watchdog and netconsole.
> > > 
> > > 	Please, tell me if you need more information or testing.
> > 
> > 
> > 
> > > NMI Watchdog detected LOCKUP on CPU 0
> > 
> > Just turn off NMI watchdog?
> > 
> > Pulling the power cable causes the SMM trap, which takes _long_ to
> > execute, potentially tickling NMI watchdog?
> 
> The system freezes silently without NMI watchdog :)

Ok... next hint:

> > > CPU 0 
> > > Modules linked in: netconsole configfs fan ebtable_broute bridge llc ebtable_nat ebtable_filter ebtables dm_snapshot dm_mirror dm_mod powernow_k8 loop arc4 snd_hda_intel ecb crypto_blkcipher cryptomgr snd_pcm_oss snd_pcm snd_mixer_oss b43 mac80211 cfg80211 crc32 snd_seq_dummy snd_seq_oss firmware_class snd_seq_midi_event ieee80211softmac snd_seq ieee80211 ieee80211_crypt snd_timer snd_seq_device i2c_nforce2 sdhci rng_core ohci1394 snd i2c_core battery ac thermal processor forcedeth mmc_core psmouse ssb ieee1394 button soundcore snd_page_alloc ehci_hcd ohci_hcd usbcore
> > > Pid: 0, comm: swapper Not tainted 2.6.25-rc3-porti-00081-g7704a8b #18
> > > RIP: 0010:[<ffffffff80220799>]  [<ffffffff80220799>] hpet_readl+0x9/0x10

Is RIP always here? If so, can you pinpoint which part of hpet_readl
causes the problem?

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

  reply	other threads:[~2008-03-05  8:27 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-03  1:07 Diego Woitasen
2008-03-04 11:09 ` Pavel Machek
2008-03-04 11:14   ` Jiri Kosina
2008-03-04 15:06     ` Pavel Machek
2008-03-04 23:00   ` Diego Woitasen
2008-03-05  8:27     ` Pavel Machek [this message]
2008-03-06 22:50       ` Diego Woitasen
2008-03-07 10:33         ` Thomas Gleixner
2008-03-09  1:30           ` Diego Woitasen
2008-03-09 15:42             ` Thomas Gleixner
2008-03-09 19:00               ` Diego Woitasen
2008-03-09 19:42                 ` Thomas Gleixner
2008-03-09 21:57                   ` Diego Woitasen
2008-03-05 23:21 ` Ed Tomlinson

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