kern/148780: [panic] mtx_lock() of spin mutex (null) @ /usr/src/sys/net/netisr.c:830

[cperciva at FreeBSD.org]

Synopsis: [panic] mtx_lock() of spin mutex (null) @ /usr/src/sys/net/netisr.c:830

Responsible-Changed-From-To: freebsd-net->freebsd-xen
Responsible-Changed-By: cperciva
Responsible-Changed-When: Sun Nov 28 14:59:04 UTC 2010
Responsible-Changed-Why: 
This is actually a FreeBSD/Xen bug.  Somehow the pcpu data is being
mangled in the presence of VM pressure; the panic shows up in netisr
because netisr looks up a per-cpu data structure (and locks it, hence
the locking assertion).



http://www.freebsd.org/cgi/query-pr.cgi?pr=148780