Merge remote-tracking branch 'remotes/dgilbert/tags/pull-migration-20180926a' into staging

Migration pull 2018-09-26

This supercedes Juan's pull from the 13th

# gpg: Signature made Wed 26 Sep 2018 18:07:30 BST
# gpg:                using RSA key 0516331EBC5BFDE7
# gpg: Good signature from "Dr. David Alan Gilbert (RH2) <dgilbert@redhat.com>"
# Primary key fingerprint: 45F5 C71B 4A0C B7FB 977A  9FA9 0516 331E BC5B FDE7

* remotes/dgilbert/tags/pull-migration-20180926a:
  migration/ram.c: Avoid taking address of fields in packed MultiFDInit_t struct
  migration: fix the compression code
  migration: fix QEMUFile leak
  tests/migration: Speed up the test on ppc64
  migration: cleanup in error paths in loadvm
  migration/postcopy: Clear have_listen_thread
  tests/migration: Add migration-test header file
  tests/migration: Support cross compilation in generating boot header file
  tests/migration: Convert x86 boot block compilation script into Makefile
  migration: use save_page_use_compression in flush_compressed_data
  migration: show the statistics of compression
  migration: do not flush_compressed_data at the end of iteration
  Add a hint message to loadvm and exits on failure
  migration: handle the error condition properly
  migration: fix calculating xbzrle_counters.cache_miss_rate
  migration/rdma: Fix uninitialised rdma_return_path

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 16 insertions, 1 deletions

diff --git a/migration/migration.c b/migration/migration.c
index 05d0a7296a..d6ae879dc8 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -758,6 +758,18 @@ static void populate_ram_info(MigrationInfo *info, MigrationState *s)
         info->xbzrle_cache->overflow = xbzrle_counters.overflow;
     }
 
+    if (migrate_use_compression()) {
+        info->has_compression = true;
+        info->compression = g_malloc0(sizeof(*info->compression));
+        info->compression->pages = compression_counters.pages;
+        info->compression->busy = compression_counters.busy;
+        info->compression->busy_rate = compression_counters.busy_rate;
+        info->compression->compressed_size =
+                                    compression_counters.compressed_size;
+        info->compression->compression_rate =
+                                    compression_counters.compression_rate;
+    }
+
     if (cpu_throttle_active()) {
         info->has_cpu_throttle_percentage = true;
         info->cpu_throttle_percentage = cpu_throttle_get_percentage();
@@ -2268,7 +2280,10 @@ out:
              */
             if (postcopy_pause_return_path_thread(ms)) {
                 /* Reload rp, reset the rest */
-                rp = ms->rp_state.from_dst_file;
+                if (rp != ms->rp_state.from_dst_file) {
+                    qemu_fclose(rp);
+                    rp = ms->rp_state.from_dst_file;
+                }
                 ms->rp_state.error = false;
                 goto retry;
             }