From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754771Ab2ILGdd (ORCPT ); Wed, 12 Sep 2012 02:33:33 -0400 Received: from ozlabs.org ([203.10.76.45]:48427 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750842Ab2ILGd3 (ORCPT ); Wed, 12 Sep 2012 02:33:29 -0400 From: Rusty Russell To: "Michael S. Tsirkin" Cc: Paolo Bonzini , fes@google.com, aarcange@redhat.com, riel@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mikew@google.com, yinghan@google.com, virtualization@lists.linux-foundation.org, yvugenfi@redhat.com, vrozenfe@redhat.com Subject: Re: [PATCH] virtio-balloon spec: provide a version of the "silent deflate" feature that works In-Reply-To: <20120910055150.GA16819@redhat.com> References: <50487382.8030303@redhat.com> <20120906105301.GC32325@redhat.com> <5048935A.8090308@redhat.com> <87wr06hg0l.fsf@rustcorp.com.au> <20120907054202.GA3452@redhat.com> <87vcfqfia1.fsf@rustcorp.com.au> <20120907104306.GA17211@redhat.com> <87sjatf6iv.fsf@rustcorp.com.au> <20120908223724.GB20588@redhat.com> <87fw6qfya7.fsf@rustcorp.com.au> <20120910055150.GA16819@redhat.com> User-Agent: Notmuch/0.13.2 (http://notmuchmail.org) Emacs/23.3.1 (i686-pc-linux-gnu) Date: Wed, 12 Sep 2012 15:54:28 +0930 Message-ID: <878vcfdahv.fsf@rustcorp.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org "Michael S. Tsirkin" writes: > We have several options: > 1. No memory overcommit feature. This is always the case ATM! > 2. Do not hot-plug assigned device. > 3. Hot-unplug assigned device. > 4. Some assigned devices can be able to handle memory errors > e.g. using ATS. Limit hotplug to these. OK, let's leave it alone, and the first person to try to implement it in a device can figure out how to fall back. I replied on the other thread: I think a SILENT_DEFLATE option is a future optimization. Cheers, Rusty.