On Friday 06 April 2012 18:19:10 Terence Telkamp wrote: > One thing I forgot to mention is that I have a machine in the kernel > debugger after the panic, so I can capture more information if any would > be helpful. > > -----Original Message----- > From: owner-freebsd-...@freebsd.org [mailto:owner-freebsd-...@freebsd.org] > On Behalf Of Terence Telkamp Sent: Friday, April 06, 2012 11:17 AM > To: freebsd-usb@freebsd.org > Subject: Impact of changes made to umass.c at r232358 > > I am seeing a kernel panic in FreeBSD 8.1, which is reproduced after > physically attaching and detaching a USB device several times. The kernel > debugger shows that the panic happens in camisr where the cam_sim and its > associated mutex are clearly destroyed. sim->refcount is 0, sim->softc is > 1 (UMASS_GONE), and the sim->mtx is destroyed (mtx_lock = 6). > > This looks very similar to FreeBSD PR kern/153514, which is unfortunately > unresolved. > > http://www.freebsd.org/cgi/query-pr.cgi?pr=153514 > > > Is it possible that the changes made to umass.c at r232358 might fix this > issue? >
Hi, I need to see the backtrace. The revision you mention fixes a detach panic issue. Current issues are happening inside CAM layer, and that is outside of USB. If you search this list for usbconfig and umass, you will find some e-mails describing how you can stress test umass attach/detach. --HPS _______________________________________________ freebsd-usb@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "freebsd-usb-unsubscr...@freebsd.org"
