migration: Initialize and cleanup decompression in migration.c

This fixes compress with colo.

Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

migration/migration.c

@@ -26,6 +26,7 @@
 #include "sysemu/cpu-throttle.h"
 #include "rdma.h"
 #include "ram.h"
+#include "ram-compress.h"
 #include "migration/global_state.h"
 #include "migration/misc.h"
 #include "migration.h"
@@ -228,6 +229,7 @@ void migration_incoming_state_destroy(void)
     struct MigrationIncomingState *mis = migration_incoming_get_current();
 
     multifd_load_cleanup();
+    compress_threads_load_cleanup();
 
     if (mis->to_src_file) {
         /* Tell source that we are done */
@@ -500,6 +502,12 @@ process_incoming_migration_co(void *opaque)
     Error *local_err = NULL;
 
     assert(mis->from_src_file);
+
+    if (compress_threads_load_setup(mis->from_src_file)) {
+        error_report("Failed to setup decompress threads");
+        goto fail;
+    }
+
     mis->migration_incoming_co = qemu_coroutine_self();
     mis->largest_page_size = qemu_ram_pagesize_largest();
     postcopy_state_set(POSTCOPY_INCOMING_NONE);
@@ -565,6 +573,7 @@ process_incoming_migration_co(void *opaque)
     qemu_fclose(mis->from_src_file);
 
     multifd_load_cleanup();
+    compress_threads_load_cleanup();
 
     exit(EXIT_FAILURE);
 }

migration/ram.c

@@ -3558,10 +3558,6 @@ void colo_release_ram_cache(void)
  */
 static int ram_load_setup(QEMUFile *f, void *opaque)
 {
-    if (compress_threads_load_setup(f)) {
-        return -1;
-    }
-
     xbzrle_load_setup();
     ramblock_recv_map_init();
 
@@ -3577,7 +3573,6 @@ static int ram_load_cleanup(void *opaque)
     }
 
     xbzrle_load_cleanup();
-    compress_threads_load_cleanup();
 
     RAMBLOCK_FOREACH_NOT_IGNORED(rb) {
         g_free(rb->receivedmap);