Re: [Xen-devel] drjones@xxxxxxxxxx, vkuznets@xxxxxxxxxx, leiwang@xxxxxxxxxx, wshi@xxxxxxxxxx

[George Dunlap <george.dunlap@xxxxxxxxxxxxx>]

On 04/23/2014 01:56 AM, Lingfei Kong wrote:
> On 04/22/2014 06:59 PM, George Dunlap wrote:
> > On Fri, Apr 18, 2014 at 2:40 AM, Lingfei Kong <lkong@xxxxxxxxxx> wrote:
> > > Hello,
> > > When i create a guest with option 'cpus="0-3"' on the command line, xl can not 
> > > parse the config. But it works well when i specify 'cpus=1' on the command line. I read 
> > > the man page xl.cfg, learned that xl support the following format:
> > > "0-3,5,^1"
> > > so  it would be very nice if xl can support this format on the command line too.
> > >
> > > Also i have file a bug on bugzilla: Bug 1886 - option `cpus="0-3"` works well 
> > > when you specify it in a configure file, but it give a error feadback when you add it to 
> > > the command line
> > >
> > >
> > >
> > > The following are the  details:
> > >
> > > Description of problem:
> > > option `cpus="0-3"` works well when you specify it in a configure file, but it 
> > > give a error feadback when you add it to the command line.
> > >
> > > Version-Release number of selected component (if applicable):
> > >
> > > How reproducible:
> > > 100%
> > >
> > > Steps to Reproduce:
> > > 1. Install a host with xen4
> > > 2. Create a guest, add option 'cpus="0-3"' on the command line
> > > # xl -v create hvm-7.0-64-1.cfg cpus="0-3"
> > > Parsing config from hvm-7.0-64-1.cfg
> > > hvm-7.0-64-1.cfg:28: config parsing error near `-3': lexical error
> > > warning: Config file looks like it contains Python code.
> > > warning:  Arbitrary Python is no longer supported.
> > > warning:  See http://wiki.xen.org/wiki/PythonInXlConfig
> > > Failed to parse config: Invalid argument
> > The problem here is that your shell is discarding the quotes; so what
> > xl sees is 'cpus=0-3', not 'cpus="0-3"'.  Try the following:
> >
> > # xl -v create hvm-7.0-64-1.cfg cpus=\"0-3\"
> >
> > -George
> Hi George,
> Thanks for your hlep. It works with cpus=\"0-3\".
Actually, a better way would be to enclose the whole thing in single 
quotes, and separate variables with a ; like so:
# xl -v create hvm.cfg 'cpus="0-3"; memory=2048'

This should at very least be documented better -- I'll send a patch to 
update the xl man page.
 -George

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