From: John Levon <levon@movementarian.org>
To: Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk>
Cc: xen-devel@lists.xensource.com
Subject: Re: Live migration fails under heavy network use
Date: Fri, 23 Feb 2007 00:22:10 +0000 [thread overview]
Message-ID: <20070223002210.GA27073@totally.trollied.org.uk> (raw)
In-Reply-To: <8A87A9A84C201449A0C56B728ACF491E0B9B44@liverpoolst.ad.cl.cam.ac.uk>
On Thu, Feb 22, 2007 at 10:34:30PM -0000, Ian Pratt wrote:
> > Not quite sure why the new domain is trying to map 00000000 though.
>
> The messages from the save side are expected. Is the message from the
> restored domain triggered by the restore code i.e. before the domain is
> un-paused?
I suspect so but haven't proved that.
> I expect if you change the 'pfn=0' in canonicalize_pagetable:539 to
> 'deadb000' you'll see that propagated through to the restore message. In
> which case, its ugly, but benign.
Wouldn't that pfn of 0 be an MFN other than 0 though? I do not see any change
when setting pfn as above. Any further ideas? I can try adding some back
traces. I suppose you're not seeing it with a Linux dom0?
> > I also see a fair amount of:
> >
> > Dom48 freeing in-use page 2991 (pseudophys 100a4): count=2
> type=e8000000
>
> That's fine. Debug builds are a bit chatty for live migration...
Both of these:
(XEN) mm.c:590:d0 Error getting mfn a005e (pfn 4c35) from L1 entry 00000000a005e705 for dom2
(XEN) mm.c:566:d0 Non-privileged (3) attempt to map I/O space 00000000
are also present in a non-debug build. Would you take a patch to make both of
them be XENLOG_INFO? It's not good that we get console noise for normal operation
(presuming the I/O space one /is/ normal operation!).
regards
john
next prev parent reply other threads:[~2007-02-23 0:22 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-20 21:50 Live migration fails under heavy network use John Levon
2007-02-20 22:38 ` Ian Pratt
2007-02-20 23:00 ` Keir Fraser
2007-02-20 23:04 ` John Levon
2007-02-20 23:12 ` David Edmondson
2007-02-20 23:48 ` Ian Pratt
2007-02-21 0:06 ` Keir Fraser
2007-02-21 0:41 ` John Levon
2007-02-21 7:32 ` Keir Fraser
2007-02-22 19:55 ` John Levon
2007-02-22 20:55 ` Keir Fraser
2007-02-22 21:11 ` John Levon
2007-02-22 22:34 ` Ian Pratt
2007-02-23 0:22 ` John Levon [this message]
2007-02-23 1:00 ` Ian Pratt
2007-02-23 1:09 ` John Levon
2007-02-20 22:55 ` Keir Fraser
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