bge panic in 8.0

[Pyun YongHyeon]

On Wed, Jan 13, 2010 at 05:47:19PM -0800, Erik Klavon wrote:
> Hi
> 
> One of my amd64 machines running 8.0p1 acting as a NAT system for many
> network clients dropped into kdb today. tr indicates a problem in
> bge.
> 
> Tracing pid 12 tid 100033 td 0xffffff0001687000
> pmap_kextract() at pmap_kextract+0x4e
> bus_dmamap_load() at bus_dmamap_load+0xab
> bge_newbuf_std() at bge_newbuf_std+0xcc
> bge_rxeof() at bge_rxeof+0x36a
> bge_intr() at bge_intr+0x1c0
> intr_event_execute_handlers() at intr_event_execute_handlers+0xfd
> ithread_loop() at ithread_loop+0x8e
> fork_exit() at fork_exit+0x118
> fork_trampoline() at fork_trampoline+0xe
> --- trap 0, rip = 0, rsp = 0xffffff8074c01d30, rbp = 0 ---
> 
> I haven't been able to find a PR that matches this particular trace.
> 
> Pyun recently MFCd to stable (hence my post to this list) some changes
> to bge that involve functions in the above trace and according to the
> commit log (r201685) may address a kernel panic. Is there any
> indication in the above trace that this is the type of panic the
> commit attempts to address? I don't have a core dump for this
> panic. This machine has been unstable on 8, so I may be able to get a
> core dump in the future. If there is other information you'd like me
> to gather, please let me know.
> 

Yes, that part of code in trace above were rewritten to address
bus_dma(9) issues. So it would be great if you can try latest
bge(4) in stable/8 and let me know how it goes on your box. I guess
you can just download if_bge.c and if_bgereg.h from stable/8 and
rebuild bge(4) would be enough to run it on 8.0-RELEASE.

> Thanks,
> 
> Erik