trackrdrd: now trying a full memory barrier it writer threads before

           sending data

trackrdrd/src/child.c

@@ -56,7 +56,6 @@
 
 #include "vsb.h"
 #include "vpf.h"
-#include "vmb.h"
 
 #include "libvarnish.h"
 #include "vsl.h"
@@ -816,7 +815,6 @@ OSL_Track(void *priv, enum VSL_tag_e tag, unsigned fd, unsigned len,
         sprintf(reqend_str, "%s=%u.%09lu", REQEND_T_VAR,
             (unsigned) reqend_t.tv_sec, reqend_t.tv_nsec);
         append(de, tag, xid, reqend_str, strlen(reqend_str));
-        VWMB();
         de->state = DATA_DONE;
         MON_StatsUpdate(STATS_DONE);
         submit(he);

trackrdrd/src/worker.c

@@ -38,6 +38,7 @@
 #include "trackrdrd.h"
 #include "vas.h"
 #include "miniobj.h"
+#include "vmb.h"
 
 #define VERSION_LEN 64
 #define CLIENT_ID_LEN 80
@@ -129,6 +130,7 @@ wrk_send(void **mq_worker, dataentry *entry, worker_data_t *wrk)
     AN(mq_worker);
 
     /* XXX: report entry->incomplete to backend ? */
+    VMB();
     errnum = mqf.send(*mq_worker, entry->data, entry->end,
                       entry->key, entry->keylen, &err);
     if (errnum != 0) {