Date: Mon, 25 Jan 2010 19:07:00 +1100 From: Peter Jeremy <peterjeremy@acm.org> To: FreeBSD-stable@freebsd.org Cc: bzeeb+freebsd+lor@zabbadoz.net Subject: New zfs/bufwait LOR Message-ID: <20100125080659.GN31243@server.vk2pj.dyndns.org> In-Reply-To: <201001242023.o0OKNj5p044592@server.vk2pj.dyndns.org>
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--37nyS7qXrnu4wN2o Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable I had the following crop up recently in 8-STABLE/amd64 from end of November. It's been reported as kern/143184. lock order reversal: 1st 0xffffff002f7fb270 zfs (zfs) @ /usr/src/sys/kern/vfs_vnops.c:533 2nd 0xffffff80803a26e0 bufwait (bufwait) @ /usr/src/sys/vm/vm_pager.c:311 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a _witness_debugger() at _witness_debugger+0x2c witness_checkorder() at witness_checkorder+0x66f __lockmgr_args() at __lockmgr_args+0x475 initpbuf() at initpbuf+0xb9 getpbuf() at getpbuf+0xdc swap_pager_getpages() at swap_pager_getpages+0x1aa vm_fault() at vm_fault+0x5f7 trap_pfault() at trap_pfault+0x128 trap() at trap+0x379 calltrap() at calltrap+0x8 --- trap 0xc, rip =3D 0xffffffff8049497b, rsp =3D 0xffffff809a427830, rbp = =3D 0xffffff809a4278b0 --- copyout() at copyout+0x3b dmu_read_uio() at dmu_read_uio+0x98 zfs_freebsd_read() at zfs_freebsd_read+0x56f VOP_READ_APV() at VOP_READ_APV+0x44 vn_read() at vn_read+0x149 dofileread() at dofileread+0xa1 kern_readv() at kern_readv+0x60 read() at read+0x55 syscall() at syscall+0x1ac Xfast_syscall() at Xfast_syscall+0xe1 --- syscall (3, FreeBSD ELF64, read), rip =3D 0x8008ce86c, rsp =3D 0x7fffff= feb718, rbp =3D 0x805b41d18 --- --=20 Peter Jeremy --37nyS7qXrnu4wN2o Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (FreeBSD) iEYEARECAAYFAktdUSMACgkQ/opHv/APuIea7wCgwWav+11QPxmxcrLageDYLqPf Eh0AnRPcXFvCT6kLQuiA2RclyLGKBm51 =L7rK -----END PGP SIGNATURE----- --37nyS7qXrnu4wN2o--
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