Commit c0bad499 authored by Paolo Bonzini's avatar Paolo Bonzini Committed by Fam Zheng
Browse files

migration/block: reset dirty bitmap before reading 



Any data that is returned by read may be stale already, the bitmap
has to be cleared before issuing the read.

Reviewed-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <20170605123908.18777-16-pbonzini@redhat.com>
Signed-off-by: default avatarFam Zheng <famz@redhat.com>
parent 2119882c

migration/block.c

+2 −1
Original line number Diff line number Diff line
@@ -532,6 +532,8 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDevState *bmds, 
            } else {

                nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK;

            }

            bdrv_reset_dirty_bitmap(bmds->dirty_bitmap, sector, nr_sectors);



            blk = g_new(BlkMigBlock, 1);

            blk->buf = g_malloc(BLOCK_SIZE);

            blk->bmds = bmds;
@@ -564,7 +566,6 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDevState *bmds, 
                g_free(blk);

            }



            bdrv_reset_dirty_bitmap(bmds->dirty_bitmap, sector, nr_sectors);

            sector += nr_sectors;

            bmds->cur_dirty = sector;