On Wednesday 24 February 2010 7:23:44 pm Ivan Voras wrote: > Ivan Voras wrote: > > I have a fairly recent 8-stable machine running under VMWare ESXi 3.5 > > (amd64 guest), which apparently crashes every few days from the same > > causes: > > > > em0: discard frame w/o packet header > > em0: discard frame w/o packet header > > em0: discard frame w/o packet header > > Panic string: sbsndptr: sockbuf 0xffffff007cca8c20 and mbuf > > 0xffffff00490a6400 clashing > > In case someone is interested or has an idea - on this machine I have > multiple crashed cores with similarily strange problems all connected > with networking and/or the em driver: > > 1) > em0: watchdog timeout -- resetting > Fatal trap 12: page fault while in kernel mode > current process = 0 (em0 taskq) > > 2) > em0: watchdog timeout -- resetting > Fatal trap 9: general protection fault while in kernel mode > current process = 1219 (slapd) > > 3) > em0: discard frame w/o packet header > panic: sbdrop > > I'm scratching my head about the #2 above - I don't think trap#9 is usual.
Certain bad pointer values on amd64 trigger a GP# rather than a PF#, so for those you would get trap 9 instead of trap 12. Specifically, the top N bits of a pointer in amd64 have to either be all 0 or all 1. If there is a mix, then you get a GP# instead of a PF#. -- John Baldwin _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[email protected]"
