panic: vm_fault_copy_wired: page missing

[Kostik Belousov]

On Thu, Apr 15, 2010 at 12:39:13PM +0300, Daniel Braniss wrote:
> > 
> > --xFkczX7rH1pKA3aV
> > Content-Type: text/plain; charset=us-ascii
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> > 
> > 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:
> > >=20
> > > panic: vm_fault_copy_wired: page missing
> > > cpuid =3D 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 =3D 0x8009f41ac, rsp =3D 0x7fff=
> > ffffe7d8,=20
> > > rbp =3D 0x800c34a80 ---
> > >=20
> > > any help in tracking this?
> > >=20
> > > thanks,
> > > 	danny
> > 
> > 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.
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