On Tuesday 16 June 2009 11:03:34 am pluknet wrote: > 2009/6/16 John Baldwin <j...@freebsd.org>: > As for allpcpu, I often see the picture, when one CPU runs the "irq17: > bce1 aacu0" thread > and another one runs arcconf. I wonder if that might be a source of > bad locking or races, or.. > The arcconf utility uses ioctl that goes into aac/aacu(4) internals.
I wondered about that. I would ask emaste@ as he has worked with arcconf. I do think he has mentioned problems with arcconf locking up aac(4) controllers in the past. > > Perhaps DDB in 6.2 doesn't know to > > look in stoppcbs[]. Hmm, looks like 6.2 only does that if you are using > > KDB_STOP_NMI. Are you using that kernel option? If not, you probably want > > to. > > No, I'm not. Will that add an additional visible overhead on a running system? No, it actually allows the kernel to more reliably stop other CPUs during a panic, etc. It's enabled in GENERIC as 'STOP_NMI' in 7.0 and later. -- John Baldwin _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
