From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751266AbdBAFIB (ORCPT ); Wed, 1 Feb 2017 00:08:01 -0500 Received: from ozlabs.org ([103.22.144.67]:35577 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750917AbdBAFH7 (ORCPT ); Wed, 1 Feb 2017 00:07:59 -0500 Date: Wed, 1 Feb 2017 16:07:54 +1100 From: Paul Mackerras To: David Gibson Cc: sjitindarsingh@gmail.com, benh@kernel.crashing.org, thuth@redhat.com, lvivier@redhat.com, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCHv2 00/11] KVM implementation of PAPR HPT resizing extension Message-ID: <20170201050754.GA8418@fergus.ozlabs.ibm.com> References: <20161220054907.9204-1-david@gibson.dropbear.id.au> <20170131221813.GA3305@fergus.ozlabs.ibm.com> <20170201045636.GT30639@umbus.fritz.box> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170201045636.GT30639@umbus.fritz.box> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Feb 01, 2017 at 03:56:36PM +1100, David Gibson wrote: > On Wed, Feb 01, 2017 at 09:18:13AM +1100, Paul Mackerras wrote: > > On Tue, Dec 20, 2016 at 04:48:56PM +1100, David Gibson wrote: > > > Here is the KVM implementation for the proposed PAPR extension which > > > allows the runtime resizing of a PAPR guest's Hashed Page Table (HPT). > > > > > > Using this requires a guest kernel with support for the extension. > > > Patches for guest side support in Linux were posted earlier: > > > https://lists.ozlabs.org/pipermail/linuxppc-dev/2016-December/152164.html > > > > > > It also requires userspace (i.e. qemu) to intercept the HPT resizing > > > hypercalls and invoke the KVM ioctl()s to implement them. This is > > > done instead of having KVM direclty intercept the hypercalls, so that > > > userspace can, if useful, impose additional restrictions on resizes: > > > for example it could refuse them entirely if policy for the VM > > > precludes resizing, or it could limit the size of HPT the guest can > > > request to meet resource limits. > > > > > > Patches to implement the userspace part of HPT resizing are proposed > > > for qemu-2.9, and can be found at: > > > https://github.com/dgibson/qemu/tree/hpt-resize > > > > > > I'm posting these now, in the hopes that both these and the > > > corresponding guest side patches can be staged and merged for the 4.11 > > > window. > > > > Thanks, series applied to my kvm-ppc-next branch. > > Great. Where can I grab that tree? git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc > > Next time, please cc kvm-ppc@vger.kernel.org so I shows up in > > patchwork and I don't miss it. > > Sorry, I hadn't realized that list existed. Noted for future > reference. Thanks, Paul.