Date: Sat, 18 Sep 2010 17:54:52 +0100 From: Bruce Cran <bruce@cran.org.uk> To: Alexander Motin <mav@FreeBSD.org> Cc: FreeBSD-Current <freebsd-current@freebsd.org> Subject: Re: One-shot timer broken on Xen Message-ID: <20100918175452.00003b6f@unknown> In-Reply-To: <4C94EC05.4070406@FreeBSD.org> References: <mailpost.1284825917.9241958.10595.mailing.freebsd.current@FreeBSD.cs.nctu.edu.tw> <4C94EC05.4070406@FreeBSD.org>
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On Sat, 18 Sep 2010 19:42:45 +0300 Alexander Motin <mav@FreeBSD.org> wrote: > Bruce Cran wrote: > > I built a new kernel from HEAD on my Xen domU today and found that > > it hung after the following messages: > > > > smist0: <SpeedStep SMI> on cpu0 > > device_attach: smist0 attach returned 6 > > Device configuration finished. > > procfs registered > > Timecounter "TSC" frequency 2000118476 Hz quality 800 > > lapic: Divisor 2, Frequency 50001605 Hz > > > > Setting kern.eventtimer.periodic to 1 allows the system to boot. > > This doesn't tells much. What event timers found by the system there > and what of them was used? Sorry - here's the kern.eventtimer output: kern.eventtimer.choice: LAPIC(400) i8254(100) RTC(0) kern.eventtimer.et.LAPIC.flags: 15 kern.eventtimer.et.LAPIC.frequency: 50001856 kern.eventtimer.et.LAPIC.quality: 400 kern.eventtimer.et.i8254.flags: 1 kern.eventtimer.et.i8254.frequency: 1193182 kern.eventtimer.et.i8254.quality: 100 kern.eventtimer.et.RTC.flags: 17 kern.eventtimer.et.RTC.frequency: 32768 kern.eventtimer.et.RTC.quality: 0 kern.eventtimer.periodic: 1 kern.eventtimer.timer: LAPIC kern.eventtimer.idletick: 0 kern.eventtimer.singlemul: 4 > Looking on kern.eventtimer.periodic support, I assume you are using > HVM? PV kernel wasn't refactored yet, but I think it would be nice. Yes, it's an i386 HVM system. > May be you could give me an access to some Xen machine? I'm going to be decomissioning another Xen machine so I can certainly give you access to that one. -- Bruce Cran
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