Date: Sat, 28 Sep 2013 17:27:27 +0200 From: Oliver Pinter <oliver.pntr@gmail.com> To: John Marshall <john.marshall@riverwillow.com.au> Cc: Konstantin Belousov <kostikbel@gmail.com>, freebsd-stable@freebsd.org Subject: Re: 9.2-RC4 amd64 panic: vm_page_unwire Message-ID: <CAPjTQNF8R8_krK6P0QRmbd9crLZM%2B2uwKZwWUxOFkdANPGC1hw@mail.gmail.com> In-Reply-To: <20130928023046.GA1428@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>
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On 9/28/13, John Marshall <john.marshall@riverwillow.com.au> 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'm running 9.2-RC4 on a handful of desktop and server machines (both >> > i386 and amd64). I have seen three panics (all vm_page_unwire) on one >> > of those systems only (amd64 server) during the past week. > >> > The first two panics were triggered when shutting down the ntpd daemon >> > (a recent development snapshot version of ntpd: 4.2.7p387). Exiting a >> > later release (p388) has not triggered the panic. The system panicked >> > again overnight, this time while acting as an sftp server receiving >> > large (GB) files from another system. > >> > 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. > > Thank you. Those patches applied cleanly to releng/9.2 so I rebuilt a > patched 9.2. I double-checked and verified that the following patched > files in my releng/9.2@255904 working copy were identical to the same > files in stable/9@254090, then I removed /usr/obj/* and built a fresh > system. > > M /usr/src/sys/vm/vm_fault.c > M /usr/src/sys/vm/vm_map.c > M /usr/src/sys/vm/vm_map.h > M /usr/src/sys/vm/vm_object.c > M /usr/src/sys/vm/vm_object.h > M /usr/src/sys/vm/vm_page.c > > The system panicked as follows during shutdown after its first boot. > The corresponding core.txt.3 file is available at the same location > previously posted. > > Fri Sep 27 22:32:18 2013 +1000 > ozsrv04# kgdb kernel.debug /var/crash/vmcore.3 > ... > Unread portion of the kernel message buffer: > . > <118>Stopping watchdogd. > <118>Waiting for PIDS: 1297 > panic: vm_page_unwire: page 0xfffffe023743eb50's wire count is zero > cpuid = 1 > KDB: stack backtrace: > #0 0xffffffff80490278 at kdb_backtrace+0x68 > #1 0xffffffff8045630a at panic+0x21a > #2 0xffffffff8068bac2 at vm_page_unwire+0x102 > #3 0xffffffff80678732 at vm_fault_unwire+0xd2 > #4 0xffffffff80680851 at vm_map_delete+0x171 > #5 0xffffffff80680acf at vm_map_remove+0x5f > #6 0xffffffff80683ea9 at vmspace_exit+0xc9 > #7 0xffffffff8041f3ad at exit1+0x72d > #8 0xffffffff804203ae at sys_sys_exit+0xe > #9 0xffffffff806afc6f at amd64_syscall+0x3bf > #10 0xffffffff8069a717 at Xfast_syscall+0xf7 > Uptime: 7m24s > > I have now seen this panic on a second server as well (also amd64 but > different hardware vendor). This second (unpatched) system also > panicked during shutdown as follows. Corresponding file named > core.txt.0.system2 is available at the same location as above. > > Sat Sep 28 06:19:59 2013 +1000 > panic: vm_page_unwire: page 0xfffffe0429aa5d18's wire count is zero > cpuid = 1 > KDB: stack backtrace: > #0 0xffffffff804e7398 at kdb_backtrace+0x68 > #1 0xffffffff804ad43a at panic+0x21a > #2 0xffffffff80717d42 at vm_page_unwire+0x102 > #3 0xffffffff80704882 at vm_fault_unwire+0xd2 > #4 0xffffffff8070c9c1 at vm_map_delete+0x171 > #5 0xffffffff8070cc3f at vm_map_remove+0x5f > #6 0xffffffff80710069 at vmspace_exit+0xc9 > #7 0xffffffff804764dd at exit1+0x72d > #8 0xffffffff804774de at sys_sys_exit+0xe > #9 0xffffffff8073d7cf at amd64_syscall+0x3bf > #10 0xffffffff80728277 at Xfast_syscall+0xf7 > Uptime: 5m31s try this from 9-STABLE: https://github.com/freebsd/freebsd/commit/98362329be8e2cdefda1988e5e9d32efbc94855f > > -- > John Marshall >
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