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Re: [Xen-devel] Re: Xen-unstable save error

To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Re: Xen-unstable save error
From: Michal Novotny <minovotn@xxxxxxxxxx>
Date: Mon, 21 Jun 2010 16:50:09 +0200
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On 06/21/2010 04:06 PM, Keir Fraser wrote:
On 21/06/2010 15:02, "Michal Novotny"<minovotn@xxxxxxxxxx>  wrote:

Ok Keir, but what I don't understand is why there's nothing in
`/local/domain/%d/device/suspend/event-channel`. So this is OK?
Yes that's okay. The guest writes that location only If it supports the new
event-channel notification method for suspend.

For the restore functionality:

# ls -ahl rhel5-32fv.sav
-rwxr-xr-x 1 root root 53M Jun 21  2010 rhel5-32fv.sav
Okay, yeah, if the guest really has 1G of memory allocated to it at the time
of the save, then something has gone wrong on the save side. But no errors
were apparent on the save side, apart from that event-channel port warning
which is benign? That's weird.

  -- Keir


Well, I see what's going on now but I had to turn on the debug flag now. According to the code, this is what's being hit per almost each page and MFN:

...
                if ( pfn_type[j] == XEN_DOMCTL_PFINFO_XTAB )
                {
                    printf("type fail: page %i mfn %08lx\n", j, gmfn);
                    continue;
                }
...

Xend.log is having many occurences of type failures:

[2010-06-21 16:48:53 10573] DEBUG (XendCheckpoint:381) type fail: page 414 mfn 0000659e [2010-06-21 16:48:53 10573] DEBUG (XendCheckpoint:129) In saveInputHandler type fail: page 414 mfn 0000659e [2010-06-21 16:48:53 10573] DEBUG (XendCheckpoint:381) type fail: page 415 mfn 0000659f [2010-06-21 16:48:53 10573] DEBUG (XendCheckpoint:129) In saveInputHandler type fail: page 415 mfn 0000659f [2010-06-21 16:48:53 10573] DEBUG (XendCheckpoint:381) type fail: page 416 mfn 000065a0 [2010-06-21 16:48:53 10573] DEBUG (XendCheckpoint:129) In saveInputHandler type fail: page 416 mfn 000065a0

Well, did somebody hit those save issues or similar?

Thanks,
Michal

--
Michal Novotny<minovotn@xxxxxxxxxx>, RHCE
Virtualization Team (xen userspace), Red Hat


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