diff mbox series

[v2,09/13] migration/ram: Consolidate variable reset after placement in ram_load_postcopy()

Message ID 20200221164204.105570-10-david@redhat.com
State New
Headers show
Series migrate/ram: Fix resizing RAM blocks while migrating | expand

Commit Message

David Hildenbrand Feb. 21, 2020, 4:42 p.m. UTC 
Let's consolidate resetting the variables.

Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Juan Quintela <quintela@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 migration/ram.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/migration/ram.c b/migration/ram.c
index f815f4e532..1a5ff07997 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -3126,7 +3126,7 @@  static int ram_load_postcopy(QEMUFile *f)
     /* Temporary page that is later 'placed' */
     void *postcopy_host_page = mis->postcopy_tmp_page;
     void *host_page = NULL;
-    bool all_zero = false;
+    bool all_zero = true;
     int target_pages = 0;
 
     while (!ret && !(flags & RAM_SAVE_FLAG_EOS)) {
@@ -3152,7 +3152,6 @@  static int ram_load_postcopy(QEMUFile *f)
         addr &= TARGET_PAGE_MASK;
 
         trace_ram_load_postcopy_loop((uint64_t)addr, flags);
-        place_needed = false;
         if (flags & (RAM_SAVE_FLAG_ZERO | RAM_SAVE_FLAG_PAGE |
                      RAM_SAVE_FLAG_COMPRESS_PAGE)) {
             block = ram_block_from_stream(f, flags);
@@ -3180,9 +3179,7 @@  static int ram_load_postcopy(QEMUFile *f)
              */
             page_buffer = postcopy_host_page +
                           host_page_offset_from_ram_block_offset(block, addr);
-            /* If all TP are zero then we can optimise the place */
             if (target_pages == 1) {
-                all_zero = true;
                 host_page = host_page_from_ram_block_offset(block, addr);
             } else if (host_page != host_page_from_ram_block_offset(block,
                                                                     addr)) {
@@ -3199,7 +3196,6 @@  static int ram_load_postcopy(QEMUFile *f)
              */
             if (target_pages == (block->page_size / TARGET_PAGE_SIZE)) {
                 place_needed = true;
-                target_pages = 0;
             }
             place_source = postcopy_host_page;
         }
@@ -3276,6 +3272,10 @@  static int ram_load_postcopy(QEMUFile *f)
                 ret = postcopy_place_page(mis, host_page, place_source,
                                           block);
             }
+            place_needed = false;
+            target_pages = 0;
+            /* Assume we have a zero page until we detect something different */
+            all_zero = true;
         }
     }