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SubjectRe: [PATCH v3 3/4] xen/interface: re-define FRONT/BACK_RING_ATTACH()
On 11.12.19 16:29, Paul Durrant wrote:
> Currently these macros are defined to re-initialize a front/back ring
> (respectively) to values read from the shared ring in such a way that any
> requests/responses that are added to the shared ring whilst the front/back
> is detached will be skipped over. This, in general, is not a desirable
> semantic since most frontend implementations will eventually block waiting
> for a response which would either never appear or never be processed.
> Since the macros are currently unused, take this opportunity to re-define
> them to re-initialize a front/back ring using specified values. This also
> allows FRONT/BACK_RING_INIT() to be re-defined in terms of
> FRONT/BACK_RING_ATTACH() using a specified value of 0.
> NOTE: BACK_RING_ATTACH() will be used directly in a subsequent patch.
> Signed-off-by: Paul Durrant <>

Reviewed-by: Juergen Gross <>


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