Date: Fri, 4 Oct 2013 23:29:00 +1000 From: John Marshall <john.marshall@riverwillow.com.au> To: freebsd-stable@freebsd.org Subject: Re: 9.2-RC4 amd64 panic: vm_page_unwire Message-ID: <20131004132900.GC20752@rwpc15.gfn.riverwillow.net.au> In-Reply-To: <20130930095507.GD2813@rwpc15.gfn.riverwillow.net.au> References: <20130927000728.GB19167@rwpc15.gfn.riverwillow.net.au> <20130927081221.GK41229@kib.kiev.ua> <20130928023046.GA1428@rwpc15.gfn.riverwillow.net.au> <CAPjTQNF8R8_krK6P0QRmbd9crLZM%2B2uwKZwWUxOFkdANPGC1hw@mail.gmail.com> <20130929212104.GB1370@rwpc15.gfn.riverwillow.net.au> <CAPjTQNGt9BY8pNC=y4om6v3bEfGmGTFZDj57DbjZi=nUzYu=iA@mail.gmail.com> <20130930095507.GD2813@rwpc15.gfn.riverwillow.net.au>
next in thread | previous in thread | raw e-mail | index | archive | help
--VbJkn9YxBvnuCH5J Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, 30 Sep 2013, 19:55 +1000, John Marshall wrote: > > >> > On Fri, 27 Sep 2013, 11:12 +0300, Konstantin Belousov wrote: > > >> >> On Fri, Sep 27, 2013 at 10:07:28AM +1000, John Marshall wrote: > > >> >> > I have made the core.txt.[0-2] files available in the following > > >> >> > directory. The directory is not browsable. > > >> >> > > > >> >> > http://www.riverwillow.net.au/~john/92rc4/ > > >> >> > > >> >> This might be fixed by r254087-r254090 on stable/9. As well as applying those patches to releng/9.2, and still seeing the panic, I have upgraded one of the systems to stable/9 and still see the panic. > Another data point: both systems on which I have seen this panic have > the ipmi driver compiled in. ipmi makes the BMC's watchdog timer > available to the system. I ruled this out. I recompiled a kernel with no ipmi driver (so that removes the watchdog timer too) but the system would still panic on shutdown when stopping ntpd. I have also reverted to the STABLE ntpd distribution (4.6.4p5 2011-12-24) and still see the panic. I took one of the systems back to releng/9.1 (9.1-RELEASE-p7). Its kernel includes the ipmi driver, I am running watchdogd, I am running ntpd, I have rebooted several times and have never seen a panic. So, I now have one system on 9.1-RELEASE (panic-free); and the second system on 9-STABLE (panics). Previously I had both systems on 9.2-RELEASE and panicking. Another common factor with all but one of the panics I have seen is that the process which appears to trigger the panic is a 'realtime' process. rwsrv08# top -b 200 | awk '(/^ PID/ || $5~/^r/)' PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND 1739 root 1 -52 r0 12056K 8040K nanslp 7 0:02 0.00% watchd= ogd 1911 root 1 -52 r0F 32668K 18468K select 7 0:02 0.00% ntpd Here is a recent stable/9 tripping over watchdogd on shutdown: FreeBSD 9.2-STABLE #0 r256029: . Stopping watchdogd. Waiting for PIDS: 1729 panic: vm_page_unwire: page 0xfffffe042bdae2d8's wire count is zero cpuid =3D 1 KDB: stack backtrace: #0 0xffffffff804e8188 at kdb_backtrace+0x68 #1 0xffffffff804adcba at panic+0x21a #2 0xffffffff80718dd2 at vm_page_unwire+0x102 #3 0xffffffff80705a52 at vm_fault_unwire+0xd2 #4 0xffffffff8070db41 at vm_map_delete+0x171 #5 0xffffffff8070ddbf at vm_map_remove+0x5f #6 0xffffffff80711199 at vmspace_exit+0xc9 #7 0xffffffff804773dd at exit1+0x72d #8 0xffffffff804783de at sys_sys_exit+0xe #9 0xffffffff8073e86f at amd64_syscall+0x3bf #10 0xffffffff80729307 at Xfast_syscall+0xf7 --=20 John Marshall --VbJkn9YxBvnuCH5J Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.21 (FreeBSD) iEYEARECAAYFAlJOwpwACgkQw/tAaKKahKJD9gCglM9e6Hc2KWZqL/elRRWO8Tss VwQAoLcL0vOR+FJb6V3WRvZ9Yzk4OHlH =7EN7 -----END PGP SIGNATURE----- --VbJkn9YxBvnuCH5J--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20131004132900.GC20752>