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Re: [Xen-devel] [PATCH 2/2] xl: add target cpupool parameter to xl migrate
- To: Juergen Gross <jgross@xxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Tue, 2 Oct 2018 15:42:01 +0100
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- Cc: ian.jackson@xxxxxxxxxxxxx, wei.liu2@xxxxxxxxxx
- Delivery-date: Tue, 02 Oct 2018 14:47:32 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 02/10/18 15:19, Juergen Gross wrote:
> Add an option to specify the cpupool on the target machine when doing
> a migration of a domain. Currently a domain is always migrated to the
> cpupool with the same name as on the source machine.
>
> Specifying "-c <cpupool>" will migrate the domain to the specified
> cpupool on the target machine. Specifying an empty string for <cpupool>
> will use the default cpupool (normally "Pool-0") on the target machine.
>
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
> ---
> docs/man/xl.pod.1.in | 5 +++++
> tools/xl/xl.h | 1 +
> tools/xl/xl_cmdtable.c | 3 +++
> tools/xl/xl_migrate.c | 15 ++++++++++-----
> tools/xl/xl_saverestore.c | 10 +++++++++-
> 5 files changed, 28 insertions(+), 6 deletions(-)
>
> diff --git a/docs/man/xl.pod.1.in b/docs/man/xl.pod.1.in
> index b74764dcd3..62f7c0f039 100644
> --- a/docs/man/xl.pod.1.in
> +++ b/docs/man/xl.pod.1.in
> @@ -451,6 +451,11 @@ domain. See the corresponding option of the I<create>
> subcommand.
> Send the specified <config> file instead of the file used on creation of the
> domain.
>
> +=item B<-c> I<cpupool>
> +
> +Migrate the domain to the specified <cpupool> on the target host. Specifying
> +an empty string for <cpupool> will use the default cpupool on <host>.
> +
Is this the wisest way to extend the interface? We already have -C to
specify new configuration, and only have 26*2 short options to use.
What if the user could supply a xl.cfg snippet on the command line to be
merged over the existing configuration? That would allow any parameter
to be changed, rather than just the cpupool.
~Andrew
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