Date: Fri, 23 Dec 2011 10:22:54 -0700 From: Charlie Martin <crmartin@sgi.com> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable@FreeBSD.org, "Peter W. Morreale" <morreale@sgi.com> Subject: Re: Mystery panic, FreeBSD 7.2-PRE Message-ID: <4EF4B8EE.8070803@sgi.com> In-Reply-To: <20111223000705.GA6242@icarus.home.lan> References: <4EF3B790.5050509@sgi.com> <20111223000705.GA6242@icarus.home.lan>
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Thanks, jeremy! On 12/22/2011 05:07 PM, Jeremy Chadwick wrote: > 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^M > devfs(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^M > This 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 -- 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>;
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