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



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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