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Re: [Xen-devel] [PATCH v2 2/3] sndif: Add explicit back and front synchronization



On 03/15/2018 10:17 PM, Konrad Rzeszutek Wilk wrote:
+ ******************************************************************************
+ *                        Back to front events delivery
+ ******************************************************************************
+ * In order to deliver asynchronous events from back to front a shared page is
+ * allocated by front and its granted reference propagated to back via
+ * XenStore entries (evt-ring-ref/evt-event-channel).
+ * This page has a common header used by both front and back to synchronize
+ * access and control event's ring buffer, while back being a producer of the
+ * events and front being a consumer. The rest of the page after the header
+ * is used for event packets.
+ *
+ * Upon reception of an event(s) front may confirm its reception
+ * for either each event, group of events or none.
+ */
+
+struct xensnd_event_page {
+    uint32_t in_cons;
+    uint32_t in_prod;
+    uint8_t reserved[24];
Could this be aligned at 64 bytes?
Sure, will make the struct 64 bytes
+};
+


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