On Wed, Mar 03, 2010 at 09:09:56AM +0100, Ruben de Groot wrote: > > > I'm going to get this kern.timecounter sysctl from the system booted with > > > a 7.x livecd > > > this evening. But really, I think this is a regression. Even if this > > > system is the only > > > one known to be affected (which I sincerely doubt). > > > > You can force a timecounter choice by setting it in /boot/loader.conf. > > I would recommend choosing ACPI-safe on your system to see if that > > improves things: > > > > kern.timecounter.hardware=ACPI-safe > > Thanks, that solved my issue. Allthough for correctness I must add that this > line > must be put in /etc/sysctl.conf; it does nothing in loader.conf. > Also the sysctl can be run in multiuser and immediately fixed the problem.
Ah, I thought it was a loader tunable, not a sysctl tunable. My apologies! Yes, sysctl.conf is the correct place for this. > One question remains: why did this suddenly become a problem in FreeBSD 8 and > not > in FreeBSD 7. That would be a question for the people who decided upon the timecounter priorities in FreeBSD, since they're hard-coded (meaning: why HPET is chosen above ACPI-safe). This may have changed between RELENG_7 and RELENG_8; I simply don't know. It would be easy to verify on your system of course (just boot a FreeBSD 7 LiveCD and provide the output from sysctl kern.timecounter). -- | Jeremy Chadwick [email protected] | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB | _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[email protected]"
