From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Vrabel Subject: Re: [Xen-users] Purpose of mem-max command Date: Wed, 14 Oct 2015 10:25:16 +0100 Message-ID: <561E1F7C.4060701@citrix.com> References: <7C676D27-F31C-4B5C-AF97-3840FD33AAC6@thehobsons.co.uk> <1444640487.1410.450.camel@citrix.com> <1444644147.1410.472.camel@citrix.com> <528267AF-80A5-4165-AD6E-51A3CAFC03F1@thehobsons.co.uk> <1444733709.23192.41.camel@citrix.com> <20151013211407.GM6226@olila.local.net-space.pl> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20151013211407.GM6226@olila.local.net-space.pl> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Daniel Kiper , Ian Campbell Cc: marco.guazzone@gmail.com, xen-users@lists.xen.org, xen-devel@lists.xensource.com, david.vrabel@citrix.com List-Id: xen-devel@lists.xenproject.org On 13/10/15 22:14, Daniel Kiper wrote: > On Tue, Oct 13, 2015 at 11:55:09AM +0100, Ian Campbell wrote: >> [CCing Daniel] >> >> Daniel, please could you advice on which Xen releases, guest types and >> guest kernel versions are currently expected to work with memory hotplug. > > Well... It worked, regardless of guest type, when it was introduced first time. > At that time xend was Xen toolstack. Than xl appeared on the scene and it stopped > working. I tried to fix it but I was diverted to something more important. Last > time David (CC-ed here) fixed some memory hotplug issues in Linux kernel (please > check for-linus-4.4 branch in git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git > for more details). I suppose that he manged to overcome some xl deficiencies and > he will be able to shed some light what he did. If not or his work is not upstreamable > then I leave this on my TODO list. I hope that I will be able to work on this next > year. However, if somebody is up to this work I am able to mentor he/she or at > least review relevant patch series. Here are my old patches for xl: > http://lists.xen.org/archives/html/xen-devel/2013-04/msg03072.html This is really > old but I think it could be good starting point for further work. I think I had to manually fiddle with xenstore keys to persuade xl to allow mem-max to work as expected. David