Re: [Xen-devel] [PATCH v3 2/3] Introduce migration precopy policy

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 25/09/17 19:55, Jennifer Herbert wrote:
> +/*
> + * A precopy_policy callback may not be running in the same address
> + * space as libxc an so precopy_stats is passed by value.
> + */

Please take a step back and thing about what is written here...

As I've said repeatedly, the structure vs pointer argument here is
entirely unrelated to the IPC boundary.

I am also unhappy that, after multiple review requests saying "turn this
into a pointer", its remained being passed by value.  It is not ok to
hack things like this up simply because its the easier cause of action.

~Andrew

> +typedef int (*precopy_policy_t)(struct precopy_stats, void *);
> +
>  /* callbacks provided by xc_domain_save */
>  struct save_callbacks {
>      /* Called after expiration of checkpoint interval,
>


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