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From: Dan Streetman <dan.streetman@canonical.com>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [Bug 1769053] Re: Cannot start a guest with more than 1TB of RAM
Date: Fri, 04 May 2018 16:19:48 -0000	[thread overview]
Message-ID: <152545078863.2035.10548904017158137407.malone@gac.canonical.com> (raw)
In-Reply-To: 152541524728.557.4600864098110042577.malonedeb@gac.canonical.com

And with non-massive mem (so the guest actually boots up), the guest
does show only 40 bits of phys mem addressing, so qemu will definitely
have to increase that to be able to provide >1TB of phys mem to the
guest (assuming qemu doesn't adjust that dynamically based on the total
mem provided to the guest)

ubuntu@largemem:~$ grep -m 1 'address sizes' /proc/cpuinfo 
address sizes	: 40 bits physical, 48 bits virtual

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https://bugs.launchpad.net/bugs/1769053

Title:
  Cannot start a guest with more than 1TB of RAM

Status in QEMU:
  Incomplete
Status in qemu package in Ubuntu:
  Incomplete

Bug description:
  Attempting to start a KVM guest with more than 1TB of RAM fails.

  It looks like we might need some extra patches:
  https://lists.gnu.org/archive/html/qemu-discuss/2017-12/msg00005.html

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: qemu-system-x86 1:2.11+dfsg-1ubuntu7
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CurrentDesktop: Unity:Unity7:ubuntu
  Date: Fri May  4 16:21:14 2018
  InstallationDate: Installed on 2017-04-05 (393 days ago)
  InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
  MachineType: Dell Inc. XPS 13 9360
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash transparent_hugepage=madvise vt.handoff=1
  SourcePackage: qemu
  UpgradeStatus: Upgraded to bionic on 2018-04-30 (3 days ago)
  dmi.bios.date: 02/26/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 2.6.2
  dmi.board.name: 0PF86Y
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr2.6.2:bd02/26/2018:svnDellInc.:pnXPS139360:pvr:rvnDellInc.:rn0PF86Y:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.family: XPS
  dmi.product.name: XPS 13 9360
  dmi.sys.vendor: Dell Inc.

To manage notifications about this bug go to:
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  parent reply	other threads:[~2018-05-04 16:31 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <152541524728.557.4600864098110042577.malonedeb@gac.canonical.com>
2018-05-04  6:46 ` [Qemu-devel] [Bug 1769053] Re: Cannot start a guest with more than 1TB of RAM Daniel Axtens
2018-05-04  7:44 ` ChristianEhrhardt
2018-05-04  8:04   ` Daniel Axtens
2018-05-04  8:12 ` ChristianEhrhardt
2018-05-04 16:10 ` Dr. David Alan Gilbert
2018-05-04 16:14 ` Dan Streetman
2018-05-04 16:15 ` Dan Streetman
2018-05-04 16:19 ` Dan Streetman [this message]
2018-05-04 16:33 ` Dr. David Alan Gilbert
2018-05-07 10:33 ` ChristianEhrhardt
2018-05-08  8:37   ` Dr. David Alan Gilbert
2018-05-08  9:57     ` ChristianEhrhardt
2018-05-08 10:26       ` Dr. David Alan Gilbert
2018-05-08 10:48 ` Daniel Berrange
2018-05-08 11:23   ` Dr. David Alan Gilbert
2018-05-08 13:22     ` Gerd Hoffmann
2018-05-08 14:00       ` Dr. David Alan Gilbert
2018-05-15  1:16 ` David Coronel
2018-05-15  7:17 `  Christian Ehrhardt 
2018-05-15  7:19 `  Christian Ehrhardt 
2018-05-15  7:45 `  Christian Ehrhardt 
2018-06-11  9:30 `  Christian Ehrhardt 
2018-06-12  7:02 ` [Qemu-devel] [Bug 1769053] Re: Ability to control phys-bits through libvirt Launchpad Bug Tracker
2018-06-12  7:04 `  Christian Ehrhardt 
2018-06-12  7:18 ` Launchpad Bug Tracker
2018-06-12  7:18 `  Christian Ehrhardt 
2018-06-12  7:46 ` Launchpad Bug Tracker
2018-06-12  8:27 `  Christian Ehrhardt 
2018-06-12 11:14 ` Launchpad Bug Tracker
2019-08-28  2:55 ` [Bug 1769053] sirswa
2019-08-28 14:16 ` ehabkost
2020-10-29 15:30 ` raistlin
2023-04-19  5:43 ` [Bug 1769053] Re: Ability to control phys-bits through libvirt Christian Ehrhardt 

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