From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andreas Olsowski Subject: Re: xen/stable-2.6.32.x xen-4.1.1 live migration fails with kernels 2.6.39, 3.0.3 and 3.1-rc2 Date: Fri, 26 Aug 2011 19:26:29 +0200 Message-ID: <4E57D745.2080701@leuphana.de> References: <4E4EA3E2.2040809@leuphana.de> <4E52224902000078000525CC@nat28.tlf.novell.com> <4E52601B.5060609@leuphana.de> <20110824203435.GA27865@dumpdata.com> <4E55F682.8060405@leuphana.de> <20110826150054.GA1793@dumpdata.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============2004812040==" Return-path: In-Reply-To: <20110826150054.GA1793@dumpdata.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Konrad Rzeszutek Wilk Cc: "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org This is a cryptographically signed message in MIME format. --===============2004812040== Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha1; boundary="------------ms070304060001000601070406" This is a cryptographically signed message in MIME format. --------------ms070304060001000601070406 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable > My todo list is not getting any shorter sadly so not sure when I will > get to try this out. But let me do that when I get my 32GB machine > working again. It would certainly be interesting to know if you experience the same=20 thing on your platforms. This may or may not have sth to do with the=20 hardware in play. > > Yeah, that really points to either the tools not liking the > MFN being too high or the hypervisor. Or the save/resume path in the > Linux kernel is failing silently and sticking in invalid MFNs > as it can't deal with higher MFNs. > > In other words - need to run this to figure out. > > Unless you are up for helping out by debugging the code a bit and > seeing if you can come with a fix? Allthough i am willing, i probably wont be able to, since i lack the=20 neccessary understanding of the low level workings of Xen and i am not=20 very experienced at debugging C code/programs. However i did some additional testing, this time with xen4.2 and things=20 have gotten worse: The two servers involved do BOTH have 96GB ram and are both running the=20 latest xen 4.2 but are of different hardware (R710 and R610): http://pastebin.com/AaSpWZdg And this is happens when i throw a 32GB server (PE2950) in the mix: http://pastebin.com/7X8t022R So with 4.2 there are still migration errors, but whats worse, now i=20 cant migrate anything anywhere anymore when the platform is different. Within the same platform everything works fine (2x R610): http://pastebin.com/ZWByjjY5 What is going on here? Could this be a xl toolstack problem after all? And why does half of it=20 work in 4.1 and not with 4.2?? Stuff like: xc: error: Failed to pin batch of 493 page tables (22 =3D Invalid=20 argument): Internal error and xc: error: Couldn't set eXtended States for vcpu0 (22 =3D Invalid=20 argument): Internal error look like some simple to debug errors. There is still one more thing left to test: xen 4.1-testing on a R610. For that i have to migrate the guests away to the other R610. I probably will get around to do it this weekend or at least on monday. Ill just reply my findings to this email once i have them. It would seem you are overloaded with too many different things, i hope=20 you still find some time to relax and i am sorry for adding more stuff=20 to your list. I will focus my future testing solely on 4.1-testing, just thought=20 checking out 4.2 may help me understand ... instead i am even more confus= ed. Have a nice weekend. 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