Date: Sat, 20 Nov 2010 15:40:09 +0800 From: Adrian Chadd <adrian@freebsd.org> To: Colin Percival <cperciva@freebsd.org> Cc: "freebsd-xen@freebsd.org" <freebsd-xen@freebsd.org> Subject: Re: system stalls when wallclock/TOD nudged Message-ID: <AANLkTikoFuUDcwF8AojoWCXdwnobbkyrj7343phmt2ap@mail.gmail.com> In-Reply-To: <4CE77AE7.3010106@freebsd.org> References: <4CE68CD7.10804@freebsd.org> <1290191413.1758.16.camel@localhost> <4CE77AE7.3010106@freebsd.org>
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I bet if you did some slicing of -head versions, you'll find an earlier version that doesn't do that. :-) ADrian On 20 November 2010 15:38, Colin Percival <cperciva@freebsd.org> wrote: > On 11/19/10 10:30, Larry Maloney wrote: >> Does your motherboard have a hardware watchdog timer? > > Not one which is accessible from within a DomU. :-) > > It seems that this bug is related somehow to the idle thread sleeping -- = when > I comment out the call to idle_block from cpu_idle_hlt in i386/machdep.c = the > stalling goes away. > >> On Fri, 2010-11-19 at 06:42 -0800, Colin Percival wrote: >>> I'm seeing a weird bug here, and I'm wondering if anyone else has exper= ienced >>> this and/or has any clue how to fix it. >>> >>> During the boot process, in the middle of running rc.d scripts, my Free= BSD/Xen >>> instance stalls. =A0It does nothing until I send a shutdown signal, at = which point >>>> [XEN] hypervisor wallclock nudged; nudging TOD. >>> and a couple buffered lines of rc.d script output are printed. =A0From = there the >>> rc.shutdown script starts running, but it too stalls after a short time= ; then I >>> see >>>> [XEN] hypervisor wallclock nudged; nudging TOD. >>>> Nov 19 14:08:33 init: timeout expired for /bin/sh on /etc/rc.shutdown:= Interrupted system call; going to single user mode >>> printed, suggesting that the shutdown watchdog timer at least managed t= o not get >>> stuck even though everything else did. > > -- > Colin Percival > Security Officer, FreeBSD | freebsd.org | The power to serve > Founder / author, Tarsnap | tarsnap.com | Online backups for the truly pa= ranoid > _______________________________________________ > freebsd-xen@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-xen > To unsubscribe, send any mail to "freebsd-xen-unsubscribe@freebsd.org" >
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