Re: [Xen-devel] [PATCH 1/3] Don't create default ioreq server

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Wed, Nov 30, 2016 at 05:47:50PM +0800, Zhang Chen wrote:
> The ioreq server make colo run failed.
> 
> Signed-off-by: Zhang Chen <zhangchen.fnst@xxxxxxxxxxxxxx>
> Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx>
> ---
>  xen/arch/x86/hvm/hvm.c | 11 -----------
>  1 file changed, 11 deletions(-)
> 
> diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
> index 25dc759..8522852 100644
> --- a/xen/arch/x86/hvm/hvm.c
> +++ b/xen/arch/x86/hvm/hvm.c
> @@ -5339,17 +5339,6 @@ static int hvmop_get_param(
>      case HVM_PARAM_IOREQ_PFN:
>      case HVM_PARAM_BUFIOREQ_PFN:
>      case HVM_PARAM_BUFIOREQ_EVTCHN:
> -    {
> -        domid_t domid;
> -
> -        /* May need to create server. */
> -        domid = d->arch.hvm_domain.params[HVM_PARAM_DM_DOMAIN];
> -        rc = hvm_create_ioreq_server(d, domid, 1,
> -                                     HVM_IOREQSRV_BUFIOREQ_LEGACY, NULL);
> -        if ( rc != 0 && rc != -EEXIST )
> -            goto out;
> -    }
> -    /*FALLTHRU*/

What is broken by ioreq server? I don't think you can change the code
like this because this is definitely going to be wrong for other use
cases -- try create a guest without COLO.

If you can be more specific about what is broken in COLO we might be
able to devise a fix for you.

>      default:
>          a.value = d->arch.hvm_domain.params[a.index];
>          break;
> -- 
> 2.7.4
> 
> 
> 

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