From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ryan Harper Subject: Re: kvm-84 and guests with more than 3536 MB Ram? Date: Tue, 24 Mar 2009 15:40:23 -0500 Message-ID: <20090324204023.GE27104@us.ibm.com> References: <1237897377.10977.40.camel@vesuv.TechFak.Uni-Bielefeld.DE> <49C8D94B.9090709@redhat.com> <1237906054.18072.8.camel@vesuv.TechFak.Uni-Bielefeld.DE> <49C90012.1020700@codemonkey.ws> <49C90490.1070906@wpkg.org> <1237918035.4577.14.camel@larosa> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Tomasz Chmielewski , Anthony Liguori , Avi Kivity , kvm@vger.kernel.org To: Lukas Kolbe Return-path: Received: from e4.ny.us.ibm.com ([32.97.182.144]:49181 "EHLO e4.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753339AbZCXUk1 (ORCPT ); Tue, 24 Mar 2009 16:40:27 -0400 Received: from d01relay02.pok.ibm.com (d01relay02.pok.ibm.com [9.56.227.234]) by e4.ny.us.ibm.com (8.13.1/8.13.1) with ESMTP id n2OKbPr3005515 for ; Tue, 24 Mar 2009 16:37:25 -0400 Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay02.pok.ibm.com (8.13.8/8.13.8/NCO v9.2) with ESMTP id n2OKePAe187066 for ; Tue, 24 Mar 2009 16:40:25 -0400 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n2OKctG4015531 for ; Tue, 24 Mar 2009 16:38:55 -0400 Content-Disposition: inline In-Reply-To: <1237918035.4577.14.camel@larosa> Sender: kvm-owner@vger.kernel.org List-ID: * Lukas Kolbe [2009-03-24 14:32]: > Am Dienstag, den 24.03.2009, 17:04 +0100 schrieb Tomasz Chmielewski: > > Anthony Liguori schrieb: > > > Lukas Kolbe wrote: > > >> On Di, 2009-03-24 at 14:59 +0200, Avi Kivity wrote: > > >> > > >>> Lukas Kolbe wrote: > > >>> > > >>>> Hi! > > >>>> > > >>>> This is my first post here so please bear with me; we have a Debian > > >>>> Lenny system with kernel 2.6.28 and kvm-84, and can't start a guest > > >>>> with > > >>>> more than 3536 MB Ram. With kvm-72 (the version lenny released with) we > > >>>> can use all 7GB that is intended for that guest. > > > > (...) > > > > >> qemu: loading initrd (0x781b93 bytes) at 0x000000007f87e000 > > >> create_userspace_phys_mem: Invalid argument > > >> kvm_cpu_register_physical_memory: failed > > >> > > >> And back to the console. When I try the same with 3584MB, I can boot > > >> into the machine flawlessly. > > >> > > >> Sorry for getting the numbers wrong in the first mail - the actual > > >> problem starts at 3585MB Ram for the guest. > > >> > > >> If you can't reproduce it with yout 2.6.28 and kvm-84, I should possibly > > >> take this to the debian bugtracker ... > > >> > > > > > > kvm-72 is pretty old. It used to be that we used phys_ram_base for > > > loading kernel/initrds which would break when using > 3.5GB of memory. > > > I wouldn't be surprised if that fix happened post kvm-72. > > > > Doesn't he say that it did work for him with kvm-72, but does not with > > kvm-84? > > Exactly that :) > kvm-72 works like a charm, with the noted exception that it crashes > every now and than on our system (during heavy load), which was the > reason we tried 084 in the first place. running kvm-84 with -m 8192 -- passes memtest on ubuntu 8.10 x86_64 server cd. Maybe wrong bios? From kvm-84 make install, I have: % md5sum /usr/local/share/qemu/bios.bin 470d43e4838be608a2447b23a9f83d90 /usr/local/share/qemu/bios.bin -- Ryan Harper Software Engineer; Linux Technology Center IBM Corp., Austin, Tx ryanh@us.ibm.com