"sigreturn: eflags = 0x80283" after medium-to-high load

[Kris Kennaway]

Ralf S. Engelschall wrote:
> Just FYI: When I compile lots of C++ code under 8.0 or 7.0 (both as of
> 2007-10-27 and running on ZFS inside a virtual machine) I'm still able
> to regularily bring the system into an unusable state. The effect is
> that first on the console the following kernel messages occur:
> 
>     sigreturn: eflags = 0x80283
>     sigreturn: eflags = 0x80297
> 
> Then after I type e.g. CTRL-C in my C++ compile session over SSH more
> such "sigreturn: eflags = 0x80283" occur on the console (and without
> bringing back a shell prompt on the SSH session). At this stage I also
> no longer can login via SSH through a new second SSH connection. Only on
> the console I still can perform a "sync; sync; sync; reboot" to rescue.
> In this situation even a regular "shutdown -r now" often just causes
> more "sigreturn: eflags = 0x80297" outputs but isn't really able to
> finally reboot the system.

Sounds like you need to do some debugging with DDB to identify the 
system state when it hangs.

Kris