Thomas Klausner wrote: >My main machine suddenly hung last night and then rebooted. There was >no big load on it at that time. dmesg contains:
[snip] >#8 0xffffffff804c3b5e in in_delayed_cksum (m=0xffff8003393c8000) at >/archive/foreign/src/sys/netinet/ip_output.c:791 >Backtrace stopped: previous frame inner to this frame (corrupt stack?) > >This does not really look like useful information, does it? Can you tell which protocol family you were using at the time ? I was regularly getting a similar crash when using NFS over IPv6, this was with a network controller that only offloads checksumming for IPv4, the in_delayed_cksum() function is where the network stack does the checksum in software. I confess that the current way that I'm trying to fix it is by switching to a network card with hardware checksumming for both IPv4 and IPv6. Robert Swindells