Re: EPT: Misconfiguration

[Avi Kivity <avi@redhat.com>]

On 01/25/2011 04:44 PM, Ruben Kerkhof wrote:
> Hi Marcello,
>
> On Fri, Jan 21, 2011 at 14:22, Marcelo Tosatti<mtosatti@redhat.com>  wrote:
> >  On Thu, Jan 20, 2011 at 12:48:00PM +0100, Ruben Kerkhof wrote:
> >>  I'm suddenly getting lots of the following errors on a server running
> >>  2.36.7, but I have no idea what it means:
> >>
> >>  2011-01-20T12:41:18.358603+01:00 phy005 kernel: EPT: Misconfiguration.
> >>  2011-01-20T12:41:18.358621+01:00 phy005 kernel: EPT: GPA: 0x3dbff6b0
> >>  2011-01-20T12:41:18.358624+01:00 phy005 kernel:
> >>  ept_misconfig_inspect_spte: spte 0x50743e007 level 4
> >>  2011-01-20T12:41:18.358627+01:00 phy005 kernel:
> >>  ept_misconfig_inspect_spte: spte 0x523de2007 level 3
> >>  2011-01-20T12:41:18.358629+01:00 phy005 kernel:
> >>  ept_misconfig_inspect_spte: spte 0x62336f007 level 2
> >>  2011-01-20T12:41:18.360109+01:00 phy005 kernel:
> >>  ept_misconfig_inspect_spte: spte 0x1603a0730500d277 level 1
> >>  2011-01-20T12:41:18.360137+01:00 phy005 kernel:
> >>  ept_misconfig_inspect_spte: rsvd_bits = 0x3a00000000000
> >>  2011-01-20T12:41:18.360151+01:00 phy005 kernel: ------------[ cut here
> >>  ]------------
> >
> >  A shadow pagetable entry in memory has bits 45-49 set, which is not
> >  allowed. Its probably bad memory if this errors were not present before
> >  with the same workload and host software. Would be useful to see what
> >  memtest86 says.
>
> I did 2 memtest86+ passes, but no errors were found.
>
> Just to be save, we replaced all memory. The machine has been running
> stable over the weekend, but now gives exactly the same error.
>
> Is there anything else which could cause this?

Try updating the BIOS.

When you say "suddenly", this was with no changes to software and hardware?

Is cooling adequate?

How much memory is on that machine?  Even outside the reserved bits the 
address looks way too large.

-- 
error compiling committee.c: too many arguments to function