freebsd stable - Apr 2010 - 7.3: instant panic upon connecting a umass

Hello!

I'm suffering from a fully reproducible panic, that strikes, when I
connect a umass storage device (Blackberry Pearl with a mini-SD card
inserted) to the EHCI USB port.

The system runs a freshly rebuilt 7.3-stable/amd64. The crash is
somewhere inside USB-stack. The stack, as produced by kgdb, can be found at:

    http://aldan.algebra.com/~mi/tmp/usb-crash.txt

The usb4-process -- the current process at the panic-time -- is
associated with:

    usb4: EHCI version 1.0
    usb4: companion controllers, 3 ports each: usb2 usb3
    usb4: <NEC uPD 720100 USB 2.0 controller> on ehci0
    usb4: USB revision 2.0
    uhub4: <NEC EHCI root hub, class 9/0, rev 2.00/1.00, addr 1> on usb4

The system is running has 6Gb of RAM and 2 dual-core Opterons. The
connection was just fine with 7.2-stable from March 5th, although that
kernel was not an SMP one (by mistake).

Please, advise. Thank you,

    -mi

P.S. Is the USB supposed to work in 7.x, or do I have to go to 8.x for
it to work reliably?

On Tue, Apr 06, 2010 at 11:39:19PM -0400, Mikhail T.
wrote:
> P.S. Is the USB supposed to work in 7.x, or do I have to go to 8.x for
> it to work reliably?
The USB stack was completely re-written from the ground up between 7.x
and 8.x.  There's a couple active maintainers of the present USB stack
who should be able to help track this down for you.

Regarding your problem: it likely has nothing to do with SMP, so don't
worry about that aspect of it.

-- 
| Jeremy Chadwick                                   jdc@parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |