panic at vm_page_wire with FreeBSD 9.0 Beta 3

K. Macy kmacy at freebsd.org
Mon Oct 31 20:34:47 UTC 2011


Someone was seeing the same issue with the vmtools kmod. The only
thing that might make sense is that the page lock array is defined as
being a different size in your kmod as in the kernel itself so the
lock corresponding to the page you're locking differs between the two
files.

Cheers

On Fri, Oct 21, 2011 at 5:25 PM, Penta Upa <bsdboot at gmail.com> wrote:
> Hi,
>
> I'm facing a kernel panic at vm_page_wire(). Page is locked with
> vm_page_lock() yet i get the following panic
> panic: mutex page lock not owned at /usr/src/sys/vm/vm_page:1845
>
> Code sequence is as below
> vm_page_lock(pp);
> vm_page_lock_assert(pp, MA_OWNED); /* No panic here */
> vm_page_wire(pp); /* Panic here for the same assertion as above, strange */
> vm_page_unlock(pp);
>
> Kernel on the system is unchanged after install. The only thing which
> occurred out the way was that the first time install failed for checksum
> mismatch for src.txz. Also there were some SCSI errors/warnings with the CD
> drive during install. So the next time, i only installed the base and
> kernel and later unpacked src.txz under /usr/src . Could this lead to any
> issues ?
>
> Attached is a test module (vmtest) and the makefile used. Uname output from
> the system is
>
> FreeBSD scache 9.0-BETA3 FreeBSD 9.0-BETA3 #0: Sat Sep 24 21:31:28 UTC
> 2011
> root at farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64
>
> Is there anything i'm doing wrong here ? Kindly help.
>
> Regards,
> Penta
>
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