From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932508AbdJZOLC (ORCPT ); Thu, 26 Oct 2017 10:11:02 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:28738 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932365AbdJZOKy (ORCPT ); Thu, 26 Oct 2017 10:10:54 -0400 Subject: Re: [PATCH v2] xen: fix booting ballooned down hvm guest To: Juergen Gross , linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org References: <20171026095056.3169-1-jgross@suse.com> Cc: hw42@ipsumj.de, stable@vger.kernel.org From: Boris Ostrovsky Message-ID: Date: Thu, 26 Oct 2017 10:12:15 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <20171026095056.3169-1-jgross@suse.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Source-IP: aserv0022.oracle.com [141.146.126.234] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/26/2017 05:50 AM, Juergen Gross wrote: > Commit 96edd61dcf44362d3ef0bed1a5361e0ac7886a63 ("xen/balloon: don't > online new memory initially") introduced a regression when booting a > HVM domain with memory less than mem-max: instead of ballooning down > immediately the system would try to use the memory up to mem-max > resulting in Xen crashing the domain. > > For HVM domains the current size will be reflected in Xenstore node > memory/static-max instead of memory/target. > > Additionally we have to trigger the ballooning process at once. > > Cc: # 4.13 > Fixes: 96edd61dcf44362d3ef0bed1a5361e0ac7886a63 ("xen/balloon: don't > online new memory initially") > > Reported-by: Simon Gaiser > Suggested-by: Boris Ostrovsky > Signed-off-by: Juergen Gross Reviewed-by: Boris Ostrovsky