Bruce Cran wrote: > On Tue, 16 Nov 2010 20:40:00 +0000 > Bruce Cran <br...@cran.org.uk> wrote: > >> One problem with the code that's been committed is that the shutdown >> event handler doesn't get run during a suspend operation so an >> emergency unload still gets done when running "acpiconf -s3". > > Something else I noticed today: I've just got a new disk that supports > NCQ and found the kern.cam.ada.ada_send_ordered sysctl that appears to > enable/disable its use (?).
ada_send_ordered controls periodical non-queued commands insertion to avoid possible infinite commands starvation and timeouts as result. NCQ can't be disabled now. > But the shutdown handler that spins > the disk down only gets initialized if ada_send_ordered is enabled. I > was wondering what the reason for this is? Interesting question. That code came as-is from "da" driver and I can't explain it. I have feeling that it's wrong. -- Alexander Motin _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
