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Re: [Xen-devel] Testing status of HVM (Intel VT) on 64bit XEN unstable c

To: Ed Smith <esmith@xxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Testing status of HVM (Intel VT) on 64bit XEN unstable c/s 11686
From: Ed Smith <esmith@xxxxxxxxxxxxxxx>
Date: Tue, 10 Oct 2006 10:44:18 -0400
Cc: Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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OK it took a lot longer to reproduce but I did hit the
Error: shadow lock held by shadow_update_cr3 crash running
mtest01 on a RHEL4U2-32bit SMP HVM guest.  I was unable to
reproduce any of the other shadow crashes.

Details in my next test report post for c/s 11731.

Ed


Ed Smith wrote:

Thanks Tim,

I'm testing with c/s 11731 now and it looks good.  I'll be posting my
test report shortly.

Ed

-----Original Message-----
From: Tim Deegan [mailto:Tim.Deegan@xxxxxxxxxxxxx] Sent: Monday, October 09, 2006 12:05 PM
To: Ed Smith
Cc: Xen Devel
Subject: Re: [Xen-devel] Testing status of HVM (Intel VT) on 64bit XEN
unstable c/s 11686

Hi Ed,

Changeset 11729:6e932f32662c of xen-unstable should fix these crashes.

Cheers,

Tim.

At 09:22 -0400 on 04 Oct (1159953769), Ed Smith wrote:
These bugs happen every time for me.  To reproduce the bug I do the
following:

- Boot a release build of XEN
- Launch a RHEL4U2-32bit HVM guest, 256MB, 2CPU SMP kernel, 4GB swap file, local SATA disk
- ssh into the guest and run the following test:
  # while [ 1 ]; do mtest01 -v -p80; done
- Within 1 or 2 passes of the test I hit one of the several crashes reported. - Nothing else is running on the guest and this is the only guest running on XEN.

Hope this helps,
Ed


-----Original Message-----
From: Tim Deegan [mailto:Tim.Deegan@xxxxxxxxxxxxx]
Sent: Wednesday, October 04, 2006 9:13 AM
To: Ed Smith
Cc: Xen Devel
Subject: Re: [Xen-devel] Testing status of HVM (Intel VT) on 64bit XEN

unstable c/s 11686

Hi Ed,

At 16:05 -0400 on 03 Oct (1159891531), Ed Smith wrote:
- NEW: Domain crash running ltp "mtest01 -p80" on 32bit SMP
  HVM guest and then XEN locked up requiring a hard reset:
  domain_crash_sync called from private.h:495 (failure.8)
- XEN crash running ltp "mtest01 -p80" on 32bit SMP HVM guest:
BUG at multi.c:2967 from sh_page_fault__shadow_3_guest_3 (failure.3)
We're having some difficulty reproducing these failures. Are you running full ltp tests or just the mtest01 binary? Are you running anything else in the VM at the time? How often do the failures occur?
Was there a difference between the tests which caused the two failures

or did they happen on different runs of the same test?

Cheers,

Tim.


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