These VMs that are running devstack are 50GB disk, so there is plenty of disk 
space.  I don’t have cinder set up with this devstack setup.

I looked in the log for the instance and in the failing case the same message 
was displayed (with different MAC and uuid), and then on the next line, I see 
this error, register dump.

KVM: entry failed, hardware error 0x0
EAX=00000000 EBX=00000000 ECX=00000000 EDX=00000663
ESI=00000000 EDI=00000000 EBP=00000000 ESP=00000000
EIP=0000e05b EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0000 00000000 0000ffff 00009300
CS =f000 000f0000 0000ffff 00009b00
SS =0000 00000000 0000ffff 00009300
DS =0000 00000000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 0000ffff
IDT=     00000000 0000ffff
CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 
DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
EFER=0000000000000000
Code=85 00 87 00 89 00 8b 00 00 00 86 00 88 00 8a 00 8c 00 00 90 <2e> 66 83 3e 
a4 65 00 0f 85 53 f2 31 c0 8e
d0 66 bc 00 70 00 00 66 ba 4f 3c 0f 00 e9 b1 f0

Can anyone glen anything from this?

In the libvirtd.log, I see:

2015-01-02 15:48:21.257+0000: 20711: info : libvirt version: 1.2.2
2015-01-02 15:48:21.257+0000: 20711: error : virNetSocketReadWire:1454 : End of 
file while reading data: Input/output error

Not much info (for me :).


PCM (Paul Michali)

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On Jan 2, 2015, at 10:41 AM, James Downs <e...@egon.cc<mailto:e...@egon.cc>> 
wrote:


On Jan 2, 2015, at 4:53 AM, Paul Michali (pcm) 
<p...@cisco.com<mailto:p...@cisco.com>> wrote:

I don’t see what the difference is between a working and non-working setup. :(

One other time I’ve seen this happen is if the compute node is low (or out) of 
disk space. If there’s connectivity problems with a cinder device, this would 
be a similar situation. As Kevin suggested, I’d also start looking into any 
logs KVM/libvirt might be generating.

Cheers,
-j


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