amd64/131209: 7.1-STABLE amd64 crash

[John Baldwin]

The following reply was made to PR amd64/131209; it has been noted by GNATS.

From: John Baldwin <jhb at freebsd.org>
To: Roar Pettersen <roar.pettersen at uib.no>
Cc: freebsd-amd64 at freebsd.org, freebsd-gnats-submit at freebsd.org
Subject: Re: amd64/131209: 7.1-STABLE amd64 crash
Date: Tue, 3 Feb 2009 12:55:29 -0500

 On Tuesday 03 February 2009 12:32:47 pm Roar Pettersen wrote:
 > Hello John !
 > 
 > > Looks to be a bug here.  Can you do 'frame 8' followed by 'l' in kgdb?
 > 
 > (kgdb) frame 8
 > #8  0xffffffff8021d746 in bce_intr (xsc=Variable "xsc" is not available.
 > ) at /usr/src/sys/dev/bce/if_bce.c:5748
 > 5748                    sc->rx_mbuf_ptr[sw_rx_cons_idx] = NULL;
 > 
 > (kgdb) l
 > 5743                    bus_dmamap_unload(sc->rx_mbuf_tag,
 > 5744                        sc->rx_mbuf_map[sw_rx_cons_idx]);
 > 5745
 > 5746                    /* Remove the mbuf from the RX chain. */
 > 5747                    m0 = sc->rx_mbuf_ptr[sw_rx_cons_idx];
 > 5748                    sc->rx_mbuf_ptr[sw_rx_cons_idx] = NULL;
 > 5749                    DBRUN(sc->debug_rx_mbuf_alloc--);
 > 5750                    sc->free_rx_bd++;
 > 5751
 > 5752                    /*
 
 Hmm, it shouldn't be faulting here. :(  Can you do 'p m0' 'p sw_rx_cons_idx' 
 and 'p sc->rx_mbuf_ptr[sw_rx_cons_idx]'?  Also, 'x/i 0xffffffff8021d746'.
 
 -- 
 John Baldwin