We've got another mystery panic in 7.2-PRE. Upgrading is not an option; however, if this is familiar to anyone, backporting a patch would be. The stack trace is: db_trace_self_wrapper() at 0xffffffff8019120a = db_trace_self_wrapper+0x2a^M panic() at 0xffffffff80308797 = panic+0x187^M devfs_populate_loop() at 0xffffffff802a45c8 = devfs_populate_loop+0x548^M devfs_populate() at 0xffffffff802a46ab = devfs_populate+0x3b^M devfs_lookup() at 0xffffffff802a7824 = devfs_lookup+0x264^M VOP_LOO[24165][irq261: plx0] DEBUG (hasc_sv_rcv_cb): rcvd hrtbt ts 24051, 7/9, rc 0^M KUP_APV() at 0xffffffff804d5995 = VOP_LOOKUP_APV+0x95^M lookup() at 0xffffffff80384a3e = lookup+0x4ce^M namei() at 0xffffffff80385768 = namei+0x2c8^M vn_open_cred() at 0xffffffff8039b283 = vn_open_cred+0x1b3^M kern_open() at 0xffffffff8039a4a0 = kern_open+0x110^M syscall() at 0xffffffff804b0e3c = syscall+0x1ec^M Xfast_syscall() at 0xffffffff80494ecb = Xfast_syscall+0xab^M --- syscall (5, FreeBSD ELF64, open), rip = 0x800e022fc, rsp = 0x7fffffbfa128, rbp = 0x801002240 ---^M KDB: enter: panic^M -- Charles R. (Charlie) Martin Senior Software Engineer SGI logo 1900 Pike Road Longmont, CO 80501 Phone: 303-532-0209 E-Mail: CRMartin@sgi.com <mailto:CRMartin@sgi.com> Website: www.sgi.com <http://www.sgi.com>
On Thu, Dec 22, 2011 at 04:04:48PM -0700, Charlie Martin wrote:> We've got another mystery panic in 7.2-PRE. Upgrading is not an > option; however, if this is familiar to anyone, backporting a patch > would be. > > The stack trace is: > > db_trace_self_wrapper() at 0xffffffff8019120a = db_trace_self_wrapper+0x2a^M > panic() at 0xffffffff80308797 = panic+0x187^M > devfs_populate_loop() at 0xffffffff802a45c8 = devfs_populate_loop+0x548^M > devfs_populate() at 0xffffffff802a46ab = devfs_populate+0x3b^M > devfs_lookup() at 0xffffffff802a7824 = devfs_lookup+0x264^M > VOP_LOO[24165][irq261: plx0] DEBUG (hasc_sv_rcv_cb): rcvd hrtbt ts > 24051, 7/9, > rc 0^M > KUP_APV() at 0xffffffff804d5995 = VOP_LOOKUP_APV+0x95^M > lookup() at 0xffffffff80384a3e = lookup+0x4ce^M > namei() at 0xffffffff80385768 = namei+0x2c8^M > vn_open_cred() at 0xffffffff8039b283 = vn_open_cred+0x1b3^M > kern_open() at 0xffffffff8039a4a0 = kern_open+0x110^M > syscall() at 0xffffffff804b0e3c = syscall+0x1ec^M > Xfast_syscall() at 0xffffffff80494ecb = Xfast_syscall+0xab^M > --- syscall (5, FreeBSD ELF64, open), rip = 0x800e022fc, rsp > 0x7fffffbfa128, > rbp = 0x801002240 ---^M > KDB: enter: panic^Mdevfs(5) has been massively worked on in RELENG_8 and newer. You should go through the below commits and see if you can find one that references a PR with a similar backtrace, or mentions things like devfs_lookup(). http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/fs/devfs/ Also, be aware that the above stack trace is interspersed. Ultimately you get to clean up the output yourself. This is a long-standing problem with FreeBSD which can be helped but only slightly/barely by using "options PRINTF_BUFR_SIZE=256" in your kernel configuration (the default configs have a value of 128. Do not increase the value too high, there are concerns about it causing major issues; I can dig up the post that says that, but I'd rather not). It *will not* solve the problem of interspersed output entirely. There still is no fix for this problem... :-( What I'm referring to:> devfs_lookup() at 0xffffffff802a7824 = devfs_lookup+0x264^M > VOP_LOO[24165][irq261: plx0] DEBUG (hasc_sv_rcv_cb): rcvd hrtbt ts > 24051, 7/9, > rc 0^M > lookup() at 0xffffffff80384a3e = lookup+0x4ce^MThis should actually read (I think):> devfs_lookup() at 0xffffffff802a7824 = devfs_lookup+0x264^M > VOP_LOOKUP_APV() at 0xffffffff804d5995 = VOP_LOOKUP_APV+0x95^M > [24165][irq261: plx0] DEBUG (hasc_sv_rcv_cb): rcvd hrtbt ts 24051, 7/9, rc 0^M-- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, US | | Making life hard for others since 1977. PGP 4BD6C0CB |
On Thu, Dec 22, 2011 at 04:04:48PM -0700, Charlie Martin wrote:> We've got another mystery panic in 7.2-PRE. Upgrading is not an option; > however, if this is familiar to anyone, backporting a patch would be. > > The stack trace is: > > db_trace_self_wrapper() at 0xffffffff8019120a = db_trace_self_wrapper+0x2a^M > panic() at 0xffffffff80308797 = panic+0x187^M > devfs_populate_loop() at 0xffffffff802a45c8 = devfs_populate_loop+0x548^M > devfs_populate() at 0xffffffff802a46ab = devfs_populate+0x3b^M > devfs_lookup() at 0xffffffff802a7824 = devfs_lookup+0x264^M > VOP_LOO[24165][irq261: plx0] DEBUG (hasc_sv_rcv_cb): rcvd hrtbt ts > 24051, 7/9, > rc 0^M > KUP_APV() at 0xffffffff804d5995 = VOP_LOOKUP_APV+0x95^M > lookup() at 0xffffffff80384a3e = lookup+0x4ce^M > namei() at 0xffffffff80385768 = namei+0x2c8^M > vn_open_cred() at 0xffffffff8039b283 = vn_open_cred+0x1b3^M > kern_open() at 0xffffffff8039a4a0 = kern_open+0x110^M > syscall() at 0xffffffff804b0e3c = syscall+0x1ec^M > Xfast_syscall() at 0xffffffff80494ecb = Xfast_syscall+0xab^M > --- syscall (5, FreeBSD ELF64, open), rip = 0x800e022fc, rsp = > 0x7fffffbfa128, > rbp = 0x801002240 ---^M > KDB: enter: panic^MIt is impossible to diagnose the real cause of the panic from the backtrace above. 99.99% of the issues causing that backtrace are problems in the specific drivers, which failed to dev_ref() the newly created cdev, e.g. in the clone handler. My interest in the issue is limited to the slightest possibility that the bug is not yet fixed in HEAD or 9/8. Usual suspects are tty, which were completely rototiled in 8. -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 196 bytes Desc: not available Url : http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20111223/9a320936/attachment.pgp