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Date:      Wed, 31 Oct 2012 10:57:18 +0100
From:      =?iso-8859-1?Q?R=E9mi_Pauchet?= <remi.pauchet@netasq.com>
To:        Gleb Smirnoff <glebius@FreeBSD.org>
Cc:        freebsd-net@FreeBSD.org
Subject:   Re: panic ixgbevf / SMP under high network load
Message-ID:  <2BF059F5-7A9C-4F13-AC73-87783E98209A@netasq.com>
In-Reply-To: <20121031095349.GL70741@glebius.int.ru>
References:  <B722D1A8-AA5F-4B80-8F84-B3935D72A498@netasq.com> <20121025164031.GA70741@FreeBSD.org> <AE47060F-235A-4F07-B840-06A2D7DCB75D@netasq.com> <20121026103006.GB70741@glebius.int.ru> <7E43156D-C927-4C18-AD3A-200582C81C65@netasq.com> <20121031095349.GL70741@glebius.int.ru>

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Le 31 oct. 2012 =E0 10:53, Gleb Smirnoff a =E9crit :

> On Wed, Oct 31, 2012 at 10:47:59AM +0100, R?mi Pauchet wrote:
> R> Hi,
> R>=20
> R> from a svn checkout r242392:
> R>=20
> R> #0  doadump (textdump=3D1) at =
/usr/svn/head/sys/kern/kern_shutdown.c:266
> R> #1  0xffffffff808d3b72 in kern_reboot (howto=3D260) at =
/usr/svn/head/sys/kern/kern_shutdown.c:449
> R> #2  0xffffffff808d359a in panic (fmt=3D0x0) at =
/usr/svn/head/sys/kern/kern_shutdown.c:637
> R> #3  0xffffffff8033f737 in db_panic (addr=3DVariable "addr" is not =
available.
> R> ) at /usr/svn/head/sys/ddb/db_command.c:482
> R> #4  0xffffffff8033fbe1 in db_command (last_cmdp=3D0xffffffff812eb1e0,=
 cmd_table=3DVariable "cmd_table" is not available.
> R> ) at /usr/svn/head/sys/ddb/db_command.c:449
> R> #5  0xffffffff8033fe30 in db_command_loop () at =
/usr/svn/head/sys/ddb/db_command.c:502
> R> #6  0xffffffff80341f89 in db_trap (type=3DVariable "type" is not =
available.
> R> ) at /usr/svn/head/sys/ddb/db_main.c:231
> R> #7  0xffffffff8090c388 in kdb_trap (type=3D12, code=3D0, =
tf=3D0xffffff80003739c0) at /usr/svn/head/sys/kern/subr_kdb.c:654
> R> #8  0xffffffff80c61dcd in trap_fatal (frame=3D0xffffff80003739c0, =
eva=3DVariable "eva" is not available.
> R> ) at /usr/svn/head/sys/amd64/amd64/trap.c:867
> R> #9  0xffffffff80c61f8a in trap_pfault (frame=3D0xffffff80003739c0, =
usermode=3D0) at /usr/svn/head/sys/amd64/amd64/trap.c:789
> R> #10 0xffffffff80c626ca in trap (frame=3D0xffffff80003739c0) at =
/usr/svn/head/sys/amd64/amd64/trap.c:463
> R> #11 0xffffffff80c4bdb3 in calltrap () at =
/usr/svn/head/sys/amd64/amd64/exception.S:228
> R> #12 0xffffffff805a5fbf in ixv_rxeof (que=3D0xfffffe000220cd00, =
count=3D118) at /usr/svn/head/sys/dev/ixgbe/ixv.c:3438
> R> #13 0xffffffff805aac91 in ixv_handle_que (context=3DVariable =
"context" is not available.
> R> ) at /usr/svn/head/sys/dev/ixgbe/ixv.c:980
> R> #14 0xffffffff80919df3 in taskqueue_run_locked =
(queue=3D0xfffffe000221a900) at =
/usr/svn/head/sys/kern/subr_taskqueue.c:308
> R> #15 0xffffffff8091a89e in taskqueue_thread_loop (arg=3DVariable =
"arg" is not available.
> R> ) at /usr/svn/head/sys/kern/subr_taskqueue.c:497
> R> #16 0xffffffff808a3e45 in fork_exit (callout=3D0xffffffff8091a860 =
<taskqueue_thread_loop>, arg=3D0xfffffe000220cd58,=20
> R>     frame=3D0xffffff8000373c00) at =
/usr/svn/head/sys/kern/kern_fork.c:995
> R> #17 0xffffffff80c4c2de in fork_trampoline () at =
/usr/svn/head/sys/amd64/amd64/exception.S:602
>=20
> This looks like another one.
>=20
> Can you please obtain the following information from kgdb:
>=20
> (kgdb) frame 12
> (kgdb) print *mp


(kgdb) frame 12
#12 0xffffffff805a5fbf in ixv_rxeof (que=3D0xfffffe000220cd00, =
count=3D118) at /usr/svn/head/sys/dev/ixgbe/ixv.c:3438
3438				mp->m_len =3D plen;
(kgdb) p *mp
Cannot access memory at address 0x0


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