From mboxrd@z Thu Jan  1 00:00:00 1970
From: Zhigang Wang <zhigang.x.wang@oracle.com>
Subject: Re: xl mem-max error
Date: Mon, 10 Nov 2014 10:29:09 -0500
Message-ID: <5460D9C5.4020905@oracle.com>
References: <545BF386.1050106@oracle.com>
	<20141107110512.GA12109@zion.uk.xensource.com>
	<545CD572.9040801@oracle.com>
	<20141110123747.GE28360@zion.uk.xensource.com>
	<1415623447.25176.12.camel@citrix.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
Received: from mail6.bemta4.messagelabs.com ([85.158.143.247])
	by lists.xen.org with esmtp (Exim 4.72)
	(envelope-from <zhigang.x.wang@oracle.com>) id 1XnquC-000107-0H
	for xen-devel@lists.xenproject.org; Mon, 10 Nov 2014 15:29:24 +0000
In-Reply-To: <1415623447.25176.12.camel@citrix.com>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: xen-devel <xen-devel@lists.xenproject.org>, Wei Liu <wei.liu2@citrix.com>, Ian Jackson <Ian.Jackson@eu.citrix.com>
List-Id: xen-devel@lists.xenproject.org

On 11/10/2014 07:44 AM, Ian Campbell wrote:
> On Mon, 2014-11-10 at 12:37 +0000, Wei Liu wrote:
> 
>> Ian and Ian, any thought how this bug came into being? I think we should
>> fix this for 4.5, but I don't think I know enough of how memory target
>> is expected to behave.
>>
> 
> I'm confused by the description of what's going on, in particular the
> mixing of mem-max commands and target xenstore nodes (since the former
> doesn't really affect the latter).
> 
> How was the domain started (memory= and maxmem=).
> 
> What were static-max and target at the point?
> 
> What did they change to when xl mem-max was issued? 
> 
> What did you expect them to change to instead?

Sorry for the confusion I made. Here is the problem I encountered:

1. Start a VM with 'memory = 700'.
2. Doing 'xl mem-max <domid> 700' will cause a error.

My expectation: after I start a VM with 'memory = 700', I can do 'xl mem-max <domid> 700'.

A little analysis of the problem:

1. Error: "libxl: error: libxl.c:4549:libxl_domain_setmaxmem: memory_static_max must be greater than or or equal to memory_dynamic_max"

2. I find static-max always less then target memory in xenstore:

    /local/domain/3/memory/static-max = "716800" (memory_static_max)
    /local/domain/3/memory/target = "716801"     (memory_dynamic_max)

   which looks bogus.

Thanks,

Zhigang