Re: [PATCH v3 for Xen 4.6 2/4] libxc: enable per-VCPU parameter settings for RTDS scheduler

[Ian Campbell <ian.campbell@citrix.com>]

On Sun, 2015-06-28 at 21:44 -0500, Chong Li wrote:
> Add xc_sched_rtds_vcpu_get/set functions to interact with Xen to get/set a domain's
> per-VCPU parameters.
> 
> Changes on PATCH v2:
> 
> 1) Minor modifications due to the change of struct xen_domctl_scheduler_op.

This intra-version changelog should go after the -- so it doesn't appear
in the final commit message.

> diff --git a/tools/libxc/xc_csched.c b/tools/libxc/xc_csched.c
> index 390c645..5a2bdf4 100644
> --- a/tools/libxc/xc_csched.c
> +++ b/tools/libxc/xc_csched.c
> @@ -36,7 +36,7 @@ xc_sched_credit_domain_set(
>      domctl.domain = (domid_t) domid;
>      domctl.u.scheduler_op.sched_id = XEN_SCHEDULER_CREDIT;
>      domctl.u.scheduler_op.cmd = XEN_DOMCTL_SCHEDOP_putinfo;
> -    domctl.u.scheduler_op.u.credit = *sdom;
> +    domctl.u.scheduler_op.u.d.credit = *sdom;

I don't see any change to any types in this series, which makes me
suspect it is in another patch and that bisectability is therefore not
maintained through the series. Each patch in the series needs to build
when they are applied one by one.

This probably means that at to at least some degree hypercall interface
changes need to be done in the same time as the libxc adjustments. You
can still keep the _new_ functionality in a separate patch of course (if
that makes sense in this case).

Ian.