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Subject: [Bug 219935] Kernel panic in getnewvnode (possibly ZFS related)
Date: Fri, 25 Aug 2017 12:33:43 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D219935

--- Comment #5 from Raimo Niskanen <raimo+freebsd@erix.ericsson.se> ---
(kgdb) p *vp->v_bufobj.bo_ops=20
$1 =3D {
  bop_name =3D 0xffffffff80fe28f1 "buf_ops_bio",=20
  bop_write =3D 0xffffffff809dc460 <bufwrite>,=20
  bop_strategy =3D 0xffffffff809dc690 <bufstrategy>,=20
  bop_sync =3D 0xffffffff809dc6d0 <bufsync>,=20
  bop_bdflush =3D 0xffffffff809dc710 <bufbdflush>
}

(kgdb) x/10a vp->v_bufobj.bo_ops=20
0xffffffff814b7380 <buf_ops_bio>:       0xffffffff80fe28f1 <sun_noname+849>=
=20=20=20=20
0xffffffff809dc460 <bufwrite>
0xffffffff814b7390 <buf_ops_bio+16>:    0xffffffff809dc690 <bufstrategy>=20=
=20=20=20=20=20=20
0xffffffff809dc6d0 <bufsync>
0xffffffff814b73a0 <buf_ops_bio+32>:    0xffffffff809dc710 <bufbdflush> 0x1
0xffffffff814b73b0 <sysctl___vfs_vmiodirenable>:        0xffffffff8169cd80
<sysctl__vfs_children>       0xffffffff814afa58
<sysctl___vfs_acl_nfs4_old_semantics>
0xffffffff814b73c0 <sysctl___vfs_vmiodirenable+16>:     0xc00400027ffffc90=
=20=20=20=20=20
0xffffffff814b73a8 <vmiodirenable>

(kgdb) p v_nmntvnodes
No symbol "v_nmntvnodes" in current context.
(kgdb) p v_cache_dst.tqh_first=20
No symbol "v_cache_dst" in current context.

Something seems to be missing there...  Tabbing suggests that these symbols=
 are
recognized, but apparently not known.  What trick have I missed?

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