> The ukbd-specific detaching only works, because I implemented something in > ukbd.c, > that Hans Petter Selasky [EMAIL PROTECTED] suggested in thread > "usbd.conf: > detach ukbd". > (See the patch files, I posted there) > > When the kernel panics, it does this in usb0 kernel thread. > I figured out that this is only related to connecting/disconnecting > the usb keyboard. It panics without kbdmux loaded and it panics with > unmodified ukbd.c. So I'll have to try to remote debug it, as > my embedded device has no swap space at all and so no core dump device > (256MB flash/256 MD dram).
Hello, I am observing spurious crashes in usb0 under FreeBSD 4.11. Kernel configuration/hardware: HZ=400, NO_SWAPPING, DEVICE_POLLING (with kern.polling.user_frac=90), fxp ethernet, 6x sio, ohci, Pentium MMX 166 MHz When quickly connecting/disconnecting a usb keyboard, after some time I have a panic in process 3 (usb0), either at usbd_ar_pipe+0x7 (when detaching) or at usbd_get_interface_descriptor+0x6 (when attaching). Stack traces are: (a) usbd_ar_pipe+0x7 usbd_ar_pipe(0,...) usbd_abort_pipe(0,...) ukbd_enable_intr() ukbd_term() ukbd_detach() DEVICE_DETACH() device_detach() device_delete_child() usb_discommect_port() uhub_explore() usb_discover() usb_event_thread() (b) usbd_get_interface_descriptor+0x6 usbd_get_interface_descriptor(0) ukbd_attach(c0bf3b80) DEVICE_ATTACH() device_probe_and_attach() usbd_probe_and_attach() usbd_new_device() uhub_explore() usb_discover() usb_event_thread() In situation(a), ipl is at bio, ks_intr_pipe is NULL when calling usbd_abort_pipe(). In situation (b), ipl is at none, USB_ATTACH_START() in USB_ATTACK(ukbd) in ukbd.c seems to make problems. The above stack traces are from ddb. Booting the kernel with -gd and using gdb -k didn't give more information. I almost always get an unusable empty stack trace and different crash addresses. It seems like 'usbd_setup_pipe: failed to start endpoint, IOERROR' always comes before the crash and ipl is mostly at bio, never at usb. When I'm doing these tests, I have an ssh console connected through fxp0 where I run usbd -dv. Any idea? Norbert _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
