From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: dom0 linux 3.6.0-rc4, crash due to ballooning althoug dom0_mem=X, max:X set Date: Thu, 6 Sep 2012 06:57:46 -0400 Message-ID: <20120906105746.GA3668@phenom.dumpdata.com> References: <1136369816.20120904183757@eikelenboom.it> <20120904163347.GH23361@phenom.dumpdata.com> <143844933.20120904191941@eikelenboom.it> <1813712325.20120904213459@eikelenboom.it> <048EAD622912254A9DEA24C1734613C18C864C3C5D@FTLPMAILBOX02.citrite.net> <20120905140600.GA5844@phenom.dumpdata.com> <1014998302.20120905163848@eikelenboom.it> <20120905201933.GA27814@phenom.dumpdata.com> <679529047.20120906005220@eikelenboom.it> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <679529047.20120906005220@eikelenboom.it> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Sander Eikelenboom Cc: Robert Phillips , Ben Guthro , "xen-devel@lists.xen.org" List-Id: xen-devel@lists.xenproject.org > > About nine of them deal with dom0_mem=max ballooning up right, so if you > > ignore those: > > > b9e0d95 xen: mark local pages as FOREIGN in the m2p_override > > d79d595 xen: Add selfballoning memory reservation tunable. > > f62805f xen: enter/exit lazy_mmu_mode around m2p_override calls > > > Try reverting any of those. > > Ah i missed your email since my hostingprovider was down :-( > But anyway done a git bisect in the mean time that leads to: > > [f62805f1f30a40e354bd036b4cb799863a39be4b] xen: enter/exit lazy_mmu_mode around m2p_override calls OK. Hmm.that will take a bit of thinking to fix. > > > > And if nothing works there then we can try to revert the ones that > > deal with 'dom0_mem=max:XX'.. > > > I also need to be able to reproduce this. You said you can only reproduce this > > on your Intel box - is this a fast Intel machine? It also looks like you only > > have 2GB in the machine - and reserve 1GB to the dom0. > > Machine is a quad core q9400 @ 2.66mhz, not very fast .. not very slow either That is a fast machine. I was thinking you had a Core2 Solo or a Pentium IV Prescott. > > > If you manually (so don't start the guest), balloon down - say to 512MB and then launch > > a guest do you see this problem? > > > Should i use > > xl mem-max domain-id mem > > or > > xl mem-set domain-id mem The later. > > for that ? > > > Perhaps a silly question, but why is it ballooning anyway ? > I have set dom0's memory and there is enough left to create the domain ... or at least there should be ... There was a bug in xl that would autoballoon. You can turn it off using some xl.conf file. > > -- > Sander