Date: Tue, 09 Jun 2009 09:58:42 -0500 From: Robert Noland <rnoland@FreeBSD.org> To: Yuri Pankov <yuri.pankov@gmail.com> Cc: freebsd-current@freebsd.org, ps@FreeBSD.org Subject: Re: panic: knlist not locked, but should be Message-ID: <1244559522.60347.1591.camel@balrog.2hip.net> In-Reply-To: <20090609135145.GB1290@darklight.homeunix.org> References: <20090609110540.GA1290@darklight.homeunix.org> <200906090937.37562.jhb@freebsd.org> <20090609135145.GB1290@darklight.homeunix.org>
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On Tue, 2009-06-09 at 17:51 +0400, Yuri Pankov wrote:
> On Tue, Jun 09, 2009 at 09:37:37AM -0400, John Baldwin wrote:
> > On Tuesday 09 June 2009 7:05:40 am Yuri Pankov wrote:
> > > Hi,
> > >=20
> > > I'm getting the following panic when running Firefox+nspluginwrapper
> > > (which crashes a lot, but paniced the box only two times, if it's eve=
n
> > > related). -CURRENT/amd64 20080607.
> > >=20
> > > Unread portion of the kernel message buffer:
> > > panic: knlist not locked, but should be
> > > cpuid =3D 0
> > > KDB: stack backtrace:
> > > db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
> > > panic() at panic+0x182
> > > knote() at knote+0xea
> > > VOP_WRITE_APV() at VOP_WRITE_APV+0x152
> > > vn_rdwr() at vn_rdwr+0x21d
> > > vn_rdwr_inchunks() at vn_rdwr_inchunks+0xc2
> > > elf32_coredump() at elf32_coredump+0x109
> > > sigexit() at sigexit+0x810
> > > postsig() at postsig+0x32f
> > > ast() at ast+0x3ac
> > > doreti_ast() at doreti_ast+0x1f
> >=20
> > Are you using ZFS?
> >=20
> > --=20
> > John Baldwin
>=20
> Yes, sorry for not mentioning it.
>=20
Ok, with guidance from jhb@ I applied the following patch, which
resolves the panic. I do still get a LOR though. He suggested that ps@
is probably the right place for this to go, cc'ed. In my case, I have a
desktop image downloaded to the desktop which is causing issues for
tracker-extract. When tracker-extract explodes it triggers the panic.
Index: contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c (revision
193531)
+++ contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c (working copy)
@@ -573,7 +573,7 @@
vfsp->mnt_flag |=3D MNT_LOCAL;
vfsp->mnt_kern_flag |=3D MNTK_MPSAFE;
vfsp->mnt_kern_flag |=3D MNTK_LOOKUP_SHARED;
- vfsp->mnt_kern_flag |=3D MNTK_SHARED_WRITES;
+// vfsp->mnt_kern_flag |=3D MNTK_SHARED_WRITES;
=20
if (error =3D dsl_prop_get_integer(osname, "readonly", &readonly,
NULL))
goto out;
lock order reversal:
1st 0xffffff00490c0848 filedesc structure (filedesc structure)
@ /usr/src/sys/kern/kern_descrip.c:1088
2nd 0xffffff00523339d0 zfs (zfs) @ /usr/src/sys/kern/vfs_subr.c:4091
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
_witness_debugger() at _witness_debugger+0x2e
witness_checkorder() at witness_checkorder+0x81e
__lockmgr_args() at __lockmgr_args+0xc2a
vop_stdlock() at vop_stdlock+0x39
VOP_LOCK1_APV() at VOP_LOCK1_APV+0xbf
_vn_lock() at _vn_lock+0x47
knlist_remove_kq() at knlist_remove_kq+0x73
knote_fdclose() at knote_fdclose+0x177
kern_close() at kern_close+0xe9
syscall() at syscall+0x1dd
Xfast_syscall() at Xfast_syscall+0xd0
--- syscall (6, FreeBSD ELF64, close), rip =3D 0x800e4242c, rsp =3D
0x7fffffffe548, rbp =3D 0x80107ecd0 ---
robert.
> Yuri
> _______________________________________________
> freebsd-current@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-current
> To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org=
"
--=20
Robert Noland <rnoland@FreeBSD.org>
FreeBSD
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