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Re: [Xen-devel] blktap problem: Re: BUG: unable to handle kernel NULL pointer dereference (4.0.1 w/

  • To: Pasi Kärkkäinen <pasik@xxxxxx>
  • From: Quartexx <quartex73@xxxxxxxxx>
  • Date: Sat, 11 Jun 2011 14:53:37 +0200
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Daniel Stodden <daniel.stodden@xxxxxxxxxx>
  • Delivery-date: Sat, 11 Jun 2011 05:54:26 -0700
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2011/6/11 Quartexx <quartex73@xxxxxxxxx>:
> 2011/6/11 Pasi Kärkkäinen <pasik@xxxxxx>:
>> Hello,
>> I added Daniel as CC, maybe he has some ideas about this one.
>> What do you do when this crash happens? How to reproduce it?

Absolutely nothing.  4 guests (all pvops) are running.   It happens in
the night when load is very low.
I disabled C-states too from bios and I set max_cstate=1 as a kernel
boot option.  Still, no luck.
As I said this happened always in the night.  The only scheduled thing
running in the night is the 3ware Check S.M.A.R.T. Thresholds
self-test (it runs every day at 12.00 am.   Crashes happened at 01:06
am and 02:17 am.
Other info:  Xen dom0 dedicated memory and preventing dom0 memory
ballooning and more CPU time than the guests (credit scheduler).
So I really don't know how to reproduce it..but it happens :\
Thanks for your help

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