From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51972) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dDvh5-000506-0D for qemu-devel@nongnu.org; Thu, 25 May 2017 12:32:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dDvh4-0004B8-Ep for qemu-devel@nongnu.org; Thu, 25 May 2017 12:32:59 -0400 From: Paolo Bonzini Date: Thu, 25 May 2017 18:32:22 +0200 Message-Id: <20170525163225.29954-16-pbonzini@redhat.com> In-Reply-To: <20170525163225.29954-1-pbonzini@redhat.com> References: <20170525163225.29954-1-pbonzini@redhat.com> Subject: [Qemu-devel] [PATCH 15/18] migration/block: reset dirty bitmap before reading List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, famz@redhat.com, stefanha@redhat.com Any data that is returned by read may be stale already, the bitmap has to be cleared before issuing the read. Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini --- migration/block.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/migration/block.c b/migration/block.c index 9e9f031..8fe484e 100644 --- a/migration/block.c +++ b/migration/block.c @@ -536,6 +536,8 @@ 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; @@ -568,7 +570,6 @@ 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; -- 1.8.3.1