Date: Tue, 25 Aug 2015 13:27:44 -0700 From: Bryan Drewery <bdrewery@FreeBSD.org> To: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Cc: Andriy Gapon <avg@FreeBSD.org>, Alexander Motin <mav@FreeBSD.org> Subject: Re: l2arc_feed_thread page fault on r287138 Message-ID: <55DCCFC0.3080307@FreeBSD.org> In-Reply-To: <55DCCDA3.8030605@FreeBSD.org> References: <55DCCDA3.8030605@FreeBSD.org>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --lhUlwXwEe6V91RlxhnP7dlf4OpuvrLn8Q Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 8/25/2015 1:18 PM, Bryan Drewery wrote: >> Fatal trap 12: page fault while in kernel mode >> cpuid =3D 2; apic id =3D 02 >> fault virtual address =3D 0xc4 >> fault code =3D supervisor read data, page not present >> instruction pointer =3D 0x20:0xffffffff80ce6c63 >> stack pointer =3D 0x28:0xfffffe3553e689d0 >> frame pointer =3D 0x28:0xfffffe3553e68a00 >> code segment =3D base 0x0, limit 0xfffff, type 0x1b >> =3D DPL 0, pres 1, long 1, def32 0, gran 1 >> processor eflags =3D interrupt enabled, resume, IOPL =3D 0 >> current process =3D 6 (l2arc_feed_thread) >> [ thread pid 6 tid 100172 ] >> Stopped at uma_dbg_free+0x53: movl 0xc4(%rdi),%esi >> db> bt >> Tracing pid 6 tid 100172 td 0xfffff8012551c9a0 >> uma_dbg_free() at uma_dbg_free+0x53/frame 0xfffffe3553e68a00 >> uma_zfree_arg() at uma_zfree_arg+0xaf/frame 0xfffffe3553e68a60 >> l2arc_feed_thread() at l2arc_feed_thread+0xe0b/frame 0xfffffe3553e68bb= 0 >> fork_exit() at fork_exit+0x84/frame 0xfffffe3553e68bf0 >> fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe3553e68bf0 >> --- trap 0, rip =3D 0, rsp =3D 0, rbp =3D 0 --- >> db> >=20 Also: > Fatal trap 12: page fault while in kernel mode > cpuid =3D 4; apic id =3D 04 > fault virtual address =3D 0xc4 > fault code =3D supervisor read data, page not present > instruction pointer =3D 0x20:0xffffffff80ce6c63 > stack pointer =3D 0x28:0xfffffe3553e689d0 > frame pointer =3D 0x28:0xfffffe3553e68a00 > copanic: Bad list head 0xfffff8012534c9a8 first->prev !=3D head > cpuid =3D 6 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe355= 4716370 > vpanic() at vpanic+0x189/frame 0xfffffe35547163f0 > panic() at panic+0x43/frame 0xfffffe3554716450 > zone_import() at zone_import+0x25f/frame 0xfffffe35547164c0 > uma_zalloc_arg() at uma_zalloc_arg+0x3c6/frame 0xfffffe3554716530 > arc_get_data_buf() at arc_get_data_buf+0x36f/frame 0xfffffe3554716580 > arc_buf_alloc() at arc_buf_alloc+0x14f/frame 0xfffffe35547165c0 > arc_read() at arc_read+0x19e/frame 0xfffffe3554716670 > dbuf_read() at dbuf_read+0x804/frame 0xfffffe3554716710 > dmu_buf_hold_array_by_dnode() at dmu_buf_hold_array_by_dnode+0x1a0/fram= e 0xfffffe3554716780 > dmu_read_uio_dnode() at dmu_read_uio_dnode+0x40/frame 0xfffffe35547167f= 0 > dmu_read_uio_dbuf() at dmu_read_uio_dbuf+0x3b/frame 0xfffffe3554716820 > zfs_freebsd_read() at zfs_freebsd_read+0x464/frame 0xfffffe35547168c0 > VOP_READ_APV() at VOP_READ_APV+0x114/frame 0xfffffe35547168f0 > vn_read() at vn_read+0x247/frame 0xfffffe3554716970 > vn_io_fault() at vn_io_fault+0x10a/frame 0xfffffe35547169f0 > dofileread() at dofileread+0x95/frame 0xfffffe3554716a40 > kern_readv() at kern_readv+0x68/frame 0xfffffe3554716a90 > sys_read() at sys_read+0x63/frame 0xfffffe3554716ae0 > amd64_syscall() at amd64_syscall+0x282/frame 0xfffffe3554716bf0 > Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe3554716bf0 > --- syscall (3, FreeBSD ELF64, sys_read), rip =3D 0x8030ad3ea, rsp =3D = 0x7fffffffdcd8, rbp =3D 0x7fffffffdd10 --- > KDB: enter: panic > [ thread pid 969 tid 100909 ] > Stopped at kdb_enter+0x3e: movq $0,kdb_why --=20 Regards, Bryan Drewery --lhUlwXwEe6V91RlxhnP7dlf4OpuvrLn8Q Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBAgAGBQJV3M/AAAoJEDXXcbtuRpfP9SQIANWm9MCiHjCqn1qif3zwgE+g jdAiZZtQ3i4p4Qj7iq5m4GnMUaULmdclid9WaobOBXfzhiaAbz0ZrYgWaa1F5ljo A/T1EM/R3uro4Dv7WLKCD2yH49VMQjIGW8dJ3MNaObmvjVb2bHDfLBWfJUOgOHTM KkJmsv8EpUJue/ZCRLxDDfLewp43NMV7lQ/DFgytQeuwNlwipHTCZKaePw0yypam 6I5PXleCVYOrvINnJpQ/nxrRTVTfNyYC/urG3OPR6DGvIUMID/RCY6173/AnT0mS ghRb+4m6NLkzznGObEvX15azuKSQIq3q2OiEwIQGqqxxEe5GtY8G7ffe4KsJ46k= =+Kmd -----END PGP SIGNATURE----- --lhUlwXwEe6V91RlxhnP7dlf4OpuvrLn8Q--
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