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Date: Thu, 06 Nov 2008 13:17:17 -0500
From: Sean Thomas Caron <scaron@umich.edu>
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Subject: Occasional kernel panic + reboot on 7.0-RELEASE with fatm driver.
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Hi folks,
I'm using fatm on FreeBSD/sparc64 7.0-RELEASE; it generally works well =20
but every couple of weeks the system will kernel panic and reboot. I =20
switched on kernel dumps on panic and here's what I got (this time):
sonnet.diablonet.net> kgdb kernel.debug /var/crash/vmcore.0
kgdb: kvm_nlist(_stopped_cpus):
kgdb: kvm_nlist(_stoppcbs):
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions=
.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "sparc64-marcel-freebsd".
Unread portion of the kernel message buffer:
panic: trap: fast data access mmu miss
Uptime: 16d13h9m7s
Dumping 1024 MB (2 chunks)
chunk at 0: 536870912 bytes |
#0 0x00000000c0280cd8 in doadump () at /usr/src/sys/kern/kern_shutdown.c:24=
0
240 savectx(&dumppcb);
(kgdb) backtrace
#0 0x00000000c0280cd8 in doadump () at /usr/src/sys/kern/kern_shutdown.c:24=
0
#1 0x00000000c0281608 in boot (howto=3D260)
at /usr/src/sys/kern/kern_shutdown.c:409
#2 0x00000000c0281860 in panic (fmt=3D0xc066c6e0 "trap: %s")
at /usr/src/sys/kern/kern_shutdown.c:563
#3 0x00000000c0541de4 in trap (tf=3D0xe5390e50)
at /usr/src/sys/sparc64/sparc64/trap.c:378
#4 0x00000000c0070fe0 in tl1_trap ()
#5 0x00000000c02dd1d0 in sbsndptr (sb=3D0xfffff800014be6f0, off=3D0, len=3D=
1390,
moff=3D0xe5391064) at /usr/src/sys/kern/uipc_sockbuf.c:939
#6 0x00000000c03edac4 in tcp_output (tp=3D0xfffff800014be6f0)
at /usr/src/sys/netinet/tcp_output.c:802
#7 0x00000000c03edac4 in tcp_output (tp=3D0xfffff800014fce38)
at /usr/src/sys/netinet/tcp_output.c:802
#8 0x00000000c03eaf98 in tcp_do_segment (m=3D0xfffff8005b354000,
th=3D0xfffff8000133283c, so=3D0xfffff800014be570, tp=3D0xfffff800014fce=
38,
drop_hdrlen=3D52, tlen=3D0) at /usr/src/sys/netinet/tcp_input.c:2347
#9 0x00000000c03ec214 in tcp_input (m=3D0xfffff8005b354000, =20
off0=3DVariable "off0" is not available.
)
at /usr/src/sys/netinet/tcp_input.c:845
#10 0x00000000c0381128 in ip_input (m=3D0xfffff8005b354000)
at /usr/src/sys/netinet/ip_input.c:665
#11 0x00000000c0339cd0 in netisr_dispatch (num=3D2, m=3D0xfffff8005b354000)
at /usr/src/sys/net/netisr.c:185
#12 0x00000000c032a930 in atm_input (ifp=3D0xfffff8000103c000, ah=3D0xe53916=
2c,
m=3D0xfffff8005b354000, rxhand=3D0x0) at /usr/src/sys/net/if_atmsubr.c:=
347
#13 0x00000000c013d410 in fatm_intr (p=3D0xfffff80001173c00)
at /usr/src/sys/dev/fatm/if_fatm.c:1573
#14 0x00000000c02615ec in ithread_loop (arg=3D0xfffff800011ce760)
at /usr/src/sys/kern/kern_intr.c:1036
#15 0x00000000c025dd54 in fork_exit (callout=3D0xc0261420 <ithread_loop>,
arg=3D0xfffff800011ce760, frame=3D0xe5391880)
at /usr/src/sys/kern/kern_fork.c:781
#16 0x00000000c00711d0 in fork_trampoline ()
#17 0x00000000c00711d0 in fork_trampoline ()
Previous frame identical to this frame (corrupt stack?)
(kgdb) up 15
#15 0x00000000c025dd54 in fork_exit (callout=3D0xc0261420 <ithread_loop>,
arg=3D0xfffff800011ce760, frame=3D0xe5391880)
at /usr/src/sys/kern/kern_fork.c:781
781 callout(arg, frame);
(kgdb) list
776 * cpu_set_fork_handler intercepts this function call to
777 * have this call a non-return function to stay in =20
kernel mode.
778 * initproc has its own fork handler, but it does return.
779 */
780 KASSERT(callout !=3D NULL, ("NULL callout in fork_exit"));
781 callout(arg, frame);
782
783 /*
784 * Check if a kernel thread misbehaved and returned =20
from its main
785 * function.
(kgdb) down
#14 0x00000000c02615ec in ithread_loop (arg=3D0xfffff800011ce760)
at /usr/src/sys/kern/kern_intr.c:1036
1036 ih->ih_handler(ih->ih_argument);
(kgdb) list
1031 __func__, p->p_pid, (void *)ih->ih_handler,
1032 ih->ih_argument, ih->ih_name, ih->ih_flags);
1033
1034 if (!(ih->ih_flags & IH_MPSAFE))
1035 mtx_lock(&Giant);
1036 ih->ih_handler(ih->ih_argument);
1037 if (!(ih->ih_flags & IH_MPSAFE))
1038 mtx_unlock(&Giant);
1039 }
1040 if (!(ie->ie_flags & IE_SOFT))
(kgdb) down
#13 0x00000000c013d410 in fatm_intr (p=3D0xfffff80001173c00)
at /usr/src/sys/dev/fatm/if_fatm.c:1573
1573 atm_input(ifp, &aph, m0, vc->rxhand);
(kgdb) list
1568 ifp->if_ipackets++;
1569
1570 vc->ipackets++;
1571 vc->ibytes +=3D m0->m_pkthdr.len;
1572
1573 atm_input(ifp, &aph, m0, vc->rxhand);
1574 }
1575
1576 H_SETSTAT(q->q.statp, FATM_STAT_FREE);
1577 H_SYNCSTAT_PREWRITE(sc, q->q.statp);
(kgdb) down
#12 0x00000000c032a930 in atm_input (ifp=3D0xfffff8000103c000, ah=3D0xe53916=
2c,
m=3D0xfffff8005b354000, rxhand=3D0x0) at /usr/src/sys/net/if_atmsubr.c:=
347
347 netisr_dispatch(isr, m);
(kgdb) list
342 else
343 m_freem(m);
344 return;
345 }
346 }
347 netisr_dispatch(isr, m);
348 }
349
350 /*
351 * Perform common duties while attaching to interface list.
(kgdb) down
#11 0x00000000c0339cd0 in netisr_dispatch (num=3D2, m=3D0xfffff8005b354000)
at /usr/src/sys/net/netisr.c:185
185 ni->ni_handler(m);
(kgdb) list
180 * the packet but now do not. Doing so here will
181 * not preserve ordering so instead we fallback to
182 * guaranteeing order only from dispatch points
183 * in the system (see above).
184 */
185 ni->ni_handler(m);
186 } else {
187 isrstat.isrs_deferred++;
188 if (IF_HANDOFF(ni->ni_queue, m, NULL))
189 schednetisr(num);
(kgdb) down
#10 0x00000000c0381128 in ip_input (m=3D0xfffff8005b354000)
at /usr/src/sys/netinet/ip_input.c:665
665 (*inetsw[ip_protox[ip->ip_p]].pr_input)(m, hlen);
(kgdb) list
660 /*
661 * Switch out to protocol's input routine.
662 */
663 ipstat.ips_delivered++;
664
665 (*inetsw[ip_protox[ip->ip_p]].pr_input)(m, hlen);
666 return;
667 bad:
668 m_freem(m);
669 }
(kgdb) down
#9 0x00000000c03ec214 in tcp_input (m=3D0xfffff8005b354000, =20
off0=3DVariable "off0" is not available.
)
at /usr/src/sys/netinet/tcp_input.c:845
845 tcp_do_segment(m, th, so, tp, drop_hdrlen, tlen);
(kgdb) list
840 /*
841 * Segment belongs to a connection in SYN_SENT, =20
ESTABLISHED or later
842 * state. tcp_do_segment() always consumes the mbuf =20
chain, unlocks
843 * the inpcb, and unlocks pcbinfo.
844 */
845 tcp_do_segment(m, th, so, tp, drop_hdrlen, tlen);
846 INP_INFO_UNLOCK_ASSERT(&tcbinfo);
847 return;
848
849 dropwithreset:
(kgdb) down
#8 0x00000000c03eaf98 in tcp_do_segment (m=3D0xfffff8005b354000,
th=3D0xfffff8000133283c, so=3D0xfffff800014be570, tp=3D0xfffff800014fce=
38,
drop_hdrlen=3D52, tlen=3D0) at /usr/src/sys/netinet/tcp_input.c:2347
2347 (void) tcp_output(tp);
(kgdb) list
2342
2343 /*
2344 * Return any desired output.
2345 */
2346 if (needoutput || (tp->t_flags & TF_ACKNOW))
2347 (void) tcp_output(tp);
2348
2349 check_delack:
2350 KASSERT(headlocked =3D=3D 0, ("%s: check_delack: head locked=
",
2351 __func__));
(kgdb) down
#7 0x00000000c03edac4 in tcp_output (tp=3D0xfffff800014fce38)
at /usr/src/sys/netinet/tcp_output.c:802
802 mb =3D sbsndptr(&so->so_snd, off, len, &moff);
(kgdb) list
797
798 /*
799 * Start the m_copy functions from the closest mbuf
800 * to the offset in the socket buffer chain.
801 */
802 mb =3D sbsndptr(&so->so_snd, off, len, &moff);
803
804 if (len <=3D MHLEN - hdrlen - max_linkhdr) {
805 m_copydata(mb, moff, (int)len,
806 mtod(m, caddr_t) + hdrlen);
(kgdb) down
#6 0x00000000c03edac4 in tcp_output (tp=3D0xfffff800014be6f0)
at /usr/src/sys/netinet/tcp_output.c:802
802 mb =3D sbsndptr(&so->so_snd, off, len, &moff);
(kgdb) list
797
798 /*
799 * Start the m_copy functions from the closest mbuf
800 * to the offset in the socket buffer chain.
801 */
802 mb =3D sbsndptr(&so->so_snd, off, len, &moff);
803
804 if (len <=3D MHLEN - hdrlen - max_linkhdr) {
805 m_copydata(mb, moff, (int)len,
806 mtod(m, caddr_t) + hdrlen);
(kgdb) down
#5 0x00000000c02dd1d0 in sbsndptr (sb=3D0xfffff800014be6f0, off=3D0, len=3D=
1390,
moff=3D0xe5391064) at /usr/src/sys/kern/uipc_sockbuf.c:939
939 off > 0 && off >=3D m->m_len;
(kgdb) list
934 *moff =3D off - sb->sb_sndptroff;
935 m =3D ret =3D sb->sb_sndptr ? sb->sb_sndptr : sb->sb_mb;
936
937 /* Advance by len to be as close as possible for the =20
next transmit. */
938 for (off =3D off - sb->sb_sndptroff + len - 1;
939 off > 0 && off >=3D m->m_len;
940 m =3D m->m_next) {
941 sb->sb_sndptroff +=3D m->m_len;
942 off -=3D m->m_len;
943 }
(kgdb) down
#4 0x00000000c0070fe0 in tl1_trap ()
(kgdb) list
944 sb->sb_sndptr =3D m;
945
946 return (ret);
947 }
948
949 /*
950 * Drop a record off the front of a sockbuf and move the next =20
record to the
951 * front.
952 */
953 void
(kgdb) quit
sonnet.diablonet.net>
Please let me know if further information is required and I will =20
furnish, no problem.
Thanks,
-Sean