Re: kernel panic: uvm_fault

[Robert Swindells <rjs%fdy2.co.uk@localhost>]

Thomas Klausner wrote:
>I had a kernel panic today with a amd64/7.99.3 kernel from Dec 20. The
>last activity I had started was downloading a file from network to an
>NFS directory mounted from a Synology.
>
>last activity I had started was downloading a file from network to an
>NFS directory mounted from a Synology.

[snip]

>#1  0xffffffff808ccb54 in vpanic (fmt=fmt@entry=0xffffffff80ddb08d "trap", ap=ap@entry=0xfffffe813bcb8510) at /archive/foreign/src/sys/kern/subr_prf.c:340
>#2  0xffffffff808ccc0f in panic (fmt=fmt@entry=0xffffffff80ddb08d "trap") at /archive/foreign/src/sys/kern/subr_prf.c:256
>#3  0xffffffff8091bd87 in trap (frame=0xfffffe813bcb8630) at /archive/foreign/src/sys/arch/amd64/amd64/trap.c:298
>#4  0xffffffff8010108e in alltraps ()
>#5  0xffffffff8028b965 in .Mmbuf_inner_loop ()
>#6  0xfffffe8349294000 in ?? ()
>#7  0xfffffe813bcb8758 in ?? ()
>#8  0xffffffff8058733e in in_delayed_cksum (m=0xffff8003393b8000) at /archive/foreign/src/sys/netinet/ip_output.c:793
>Backtrace stopped: previous frame inner to this frame (corrupt stack?)
>(gdb)

>Is this a valid backtrace? Does it give any useful hints?

It looks the same as the panic you had back in September to me:

<http://mail-index.netbsd.org/current-users/2014/09/13/msg025777.html>

Can you turn on HW checksumming on this machine ?

Robert Swindells