Date: Fri, 17 Sep 2004 14:45:32 +0900 From: Sangwoo Shim <ssw@neo.redjade.org> To: FUJIMOTO Kou <fujimoto@j.dendai.ac.jp> Cc: current@freebsd.org Subject: Re: BETA4 kernel panic on boot with USB devices Message-ID: <20040917054532.GA56420@neo.redjade.org> In-Reply-To: <4146C15B.3090402@j.dendai.ac.jp> References: <4146C15B.3090402@j.dendai.ac.jp>
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On Tue, Sep 14, 2004 at 07:00:59PM +0900, FUJIMOTO Kou wrote:
> Hi,
>
> I found 5.3-BETA4 kernel hangs on boot sequence.
[snip]
> after this message, kernel panic occurs.
I've seen this, too. (though I'm using 6.0-CURRENT of today.)
odin:~ $ uname -a
FreeBSD odin 6.0-CURRENT FreeBSD 6.0-CURRENT #1: Fri Sep 17 13:32:39 KST 2004 root@odin:/usr/obj/usr/src/sys/ODIN i386
odin:~ $
I'm using usb keyboard with 2-port usb hub.
(HHK lite2, maybe same as FUJIMOTO-san's. ;-))
The following is the tr output in the DDB. (hand-writen)
instruction ptr. 0x8:0xc04c6b73
kobj_delete()
device_delete_child()
usb_disconnect_port()
uhub_detach()
device_detach()
device_delete_child()
usb_disconnect_port()
uhub_explore()
usb_discover()
usb_event_thread()
fork_exit()
fork_trampoline()
Grepped output of instruction pointer.
odin:/usr/obj/usr/src/sys/ODIN $ nm kernel.debug | grep c04c6b
c04c6b68 T kobj_delete
odin:/usr/obj/usr/src/sys/ODIN $
kgdb output.
(kgdb) l *0xc04c6b73
0xc04c6b73 is in kobj_delete (/usr/src/sys/kern/subr_kobj.c:323).
318 }
319
320 void
321 kobj_delete(kobj_t obj, struct malloc_type *mtype)
322 {
323 kobj_class_t cls = obj->ops->cls;
324 int refs;
325
326 /*
327 * Consider freeing the compiled method table for the class
(kgdb) fr 24
#24 0xc04c23dc in device_delete_child (dev=0x0, child=0xc1ffba00)
at /usr/src/sys/kern/subr_bus.c:1489
1489 kobj_delete((kobj_t) child, M_BUS);
(kgdb) p *child
$3 = {ops = 0x0, link = {tqe_next = 0x0, tqe_prev = 0xc1ffbd98}, devlink = {
tqe_next = 0x0, tqe_prev = 0xc1ffbd8c}, parent = 0xc1ffbd80, children = {
tqh_first = 0x0, tqh_last = 0xc1ffba18}, driver = 0x0, devclass = 0x0,
unit = -1, nameunit = 0x0, desc = 0x0, busy = 0, state = DS_NOTPRESENT,
devflags = 0, flags = 53, order = 0 '\0', pad = 0 '\0', ivars = 0xc1d2fdc0,
softc = 0x0, sysctl_ctx = {tqh_first = 0xc1a40870, tqh_last = 0xc1a72784},
sysctl_tree = 0x0}
This panic is 100% reproducible if I unplug the keyboard.
Or, boot with the keyboard plugged. (As FUJIMOTO-san said,
USB keyboard and mouse are detached and reattached in boot sequence.)
Regards,
Sangwoo
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