[Xen-devel] memory fault

[David Becker <becker@xxxxxxxxxxx>]

xc_dmesg.py was very helpful.

I can semi-reproduce the faults at this point.  Some hosts seem more
prone than others to faulting, even though they are the same hardware.
Domain-0 has crashed rarely but normally the domain running the app
crashes.  The app is a big multithreaded overlay network project
program.

I turned off -NODEBUG in arch/i386/Rules
but didn't notice any change in the console output.

I see:
     DOM2: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
That message doesn't always reboot domain, sometimes prints just once,
and sometimes prints in long batches.

     DOM1: Weird failure in hard_start_xmit
This pops up occasionally and may prevent some TCP connections.  Not
sure though.

     DOM3: Unable to handle kernel paging request at virtual address c3f77820
        ...
     DOM3: Oops: 0002
The application domain has a 1GB virtual disk swap space.  It is
certainly not running out of swap.  As long as domain-0  doesn't crash I
can get the oops info out of the xen console.


The setup is xen-1.2 without -NODEBUG on uni-P4 cpu with hyperthreading.
The NIC is a tg3.   Running two domains, each with 1GB of swap.   I'm not doing
anything at all with the balloon system.

I have not tried this with 1.3 yet.





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