ram: Remove migration_bitmap_extend()

We have disabled memory hotplug, so we don't need to handle migration_bitamp there. Signed-off-by: Juan Quintela <[email protected]> Reviewed-by: Eric Blake <[email protected]> Reviewed-by: zhanghailiang <[email protected]>
zhoulunhao · Apr 21, 2017 · 66103a5 · 66103a5
1 parent b06424d
commit 66103a5
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Showing 3 changed files with 0 additions and 37 deletions.
diff --git a/exec.c b/exec.c
@@ -1758,7 +1758,6 @@ static void ram_block_add(RAMBlock *new_block, Error **errp)
     new_ram_size = MAX(old_ram_size,
               (new_block->offset + new_block->max_length) >> TARGET_PAGE_BITS);
     if (new_ram_size > old_ram_size) {
-        migration_bitmap_extend(old_ram_size, new_ram_size);
         dirty_memory_extend(old_ram_size, new_ram_size);
     }
     /* Keep the list sorted from biggest to smallest block.  Unlike QTAILQ,

diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h
@@ -413,7 +413,5 @@ uint64_t cpu_physical_memory_sync_dirty_bitmap(unsigned long *dest,
 
     return num_dirty;
 }
-
-void migration_bitmap_extend(ram_addr_t old, ram_addr_t new);
 #endif
 #endif
diff --git a/migration/ram.c b/migration/ram.c
@@ -1496,40 +1496,6 @@ static void ram_state_reset(RAMState *rs)
 
 #define MAX_WAIT 50 /* ms, half buffered_file limit */
 
-void migration_bitmap_extend(ram_addr_t old, ram_addr_t new)
-{
-    RAMState *rs = &ram_state;
-
-    /* called in qemu main thread, so there is
-     * no writing race against this migration_bitmap
-     */
-    if (rs->ram_bitmap) {
-        RAMBitmap *old_bitmap = rs->ram_bitmap, *bitmap;
-        bitmap = g_new(RAMBitmap, 1);
-        bitmap->bmap = bitmap_new(new);
-
-        /* prevent migration_bitmap content from being set bit
-         * by migration_bitmap_sync_range() at the same time.
-         * it is safe to migration if migration_bitmap is cleared bit
-         * at the same time.
-         */
-        qemu_mutex_lock(&rs->bitmap_mutex);
-        bitmap_copy(bitmap->bmap, old_bitmap->bmap, old);
-        bitmap_set(bitmap->bmap, old, new - old);
-
-        /* We don't have a way to safely extend the sentmap
-         * with RCU; so mark it as missing, entry to postcopy
-         * will fail.
-         */
-        bitmap->unsentmap = NULL;
-
-        atomic_rcu_set(&rs->ram_bitmap, bitmap);
-        qemu_mutex_unlock(&rs->bitmap_mutex);
-        rs->migration_dirty_pages += new - old;
-        call_rcu(old_bitmap, migration_bitmap_free, rcu);
-    }
-}
-
 /*
  * 'expected' is the value you expect the bitmap mostly to be full
  * of; it won't bother printing lines that are all this value.
-Original file line number
+Diff line change
@@ Expand Up @@
         return num_dirty;
     }
-    void migration_bitmap_extend(ram_addr_t old, ram_addr_t new);
     #endif
     #endif