panic: vm_fault_copy_wired: page missing

[Daniel Braniss]

> 
> --U3Zg06C/E2vtHpAW
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> On Thu, Apr 15, 2010 at 12:39:13PM +0300, Daniel Braniss wrote:
> > >=20
> > > --xFkczX7rH1pKA3aV
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> > >=20
> > > On Thu, Apr 15, 2010 at 10:22:20AM +0300, Daniel Braniss wrote:
> > > > Hi,
> > > > I'm getting this with FreeBSD-8-stable, it usually happens when
> > > > starting apache:
> > > >=3D20
> > > > panic: vm_fault_copy_wired: page missing
> > > > cpuid =3D3D 3
> > > > KDB: enter: panic
> > > > [thread pid 1013 tid 100106 ]
> > > > Stopped at      kdb_enter+0x3d: movq    $0,0x68f170(%rip)
> > > > db> tr
> > > > Tracing pid 1013 tid 100106 td 0xffffff0007a66ae0
> > > > kdb_enter() at kdb_enter+0x3d
> > > > panic() at panic+0x17b
> > > > vm_fault_copy_entry() at vm_fault_copy_entry+0x283
> > > > vmspace_fork() at vmspace_fork+0x4d0
> > > > fork1() at fork1+0x35f
> > > > fork() at fork+0x1c
> > > > syscall() at syscall+0x1e7
> > > > Xfast_syscall() at Xfast_syscall+0xe1
> > > > --- syscall (2, FreeBSD ELF64, fork), rip =3D3D 0x8009f41ac, rsp =3D3=
> D 0x7fff=3D
> > > ffffe7d8,=3D20
> > > > rbp =3D3D 0x800c34a80 ---
> > > >=3D20
> > > > any help in tracking this?
> > > >=3D20
> > > > thanks,
> > > > 	danny
> > >=20
> > > Is it true that the process started, or at least some of loaded dso
> > > are from NFS mount ?
> > everything is nfs :-), the host is dataless
> > but redusing the amount of physical memory has solved the
> > problem, so I don't think NFS is the problem.
> 
> I do think that NFS is problem. Another key point is that your process
> is mlock'ed, right ? This is kind of known issue with NFS and mlock.
> 
well, since it's panicking again, there goes the memsize theory.
this is getting weirder and weirder, it now panics on reboot:

Stopping cron.
Stopping sshd.
===> apache22 profile: httpd
===> apache22 profile: httpdyn
Stopping inetd.
Stopping ntpd.
Stopping lockd.
Waiting for PIDS: 1201.
Stopping statd.
Stopping nfsd.
Stopping mountd.
Stopping devd.
.
Apr 15 13:27:48 sf-02 syslogd: exiting on signal 15
panic: vm_fault_copy_wired: page missing
cpuid = 1
KDB: enter: panic
[thread pid 1014 tid 100118 ]
Stopped at      kdb_enter+0x3d: movq    $0,0x68f7a0(%rip)
db>  tr
Tracing pid 1014 tid 100118 td 0xffffff000533f3a0
kdb_enter() at kdb_enter+0x3d
panic() at panic+0x17b
vm_fault_copy_entry() at vm_fault_copy_entry+0x283
vmspace_fork() at vmspace_fork+0x4d0
fork1() at fork1+0x35f
fork() at fork+0x1c
syscall() at syscall+0x1e7
Xfast_syscall() at Xfast_syscall+0xe1
--- syscall (2, FreeBSD ELF64, fork), rip = 0x8009f41ac, rsp = 0x7fffffffe7d8, rbp = 0x800c34a00 ---