From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:58595) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UFRXh-0001TH-20 for qemu-devel@nongnu.org; Tue, 12 Mar 2013 11:55:15 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UFRXY-0004AI-W2 for qemu-devel@nongnu.org; Tue, 12 Mar 2013 11:55:07 -0400 Received: from ssl.dlhnet.de ([91.198.192.8]:46077 helo=ssl.dlh.net) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UFRXY-0004AB-P6 for qemu-devel@nongnu.org; Tue, 12 Mar 2013 11:55:00 -0400 Message-ID: <513F4FD6.2060609@dlhnet.de> Date: Tue, 12 Mar 2013 16:55:02 +0100 From: Peter Lieven MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] [RFC][PATCH 9/9] migration: do not search dirty pages in bulk stage List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "qemu-devel@nongnu.org" Cc: Kevin Wolf , Paolo Bonzini , Orit Wasserman , Stefan Hajnoczi avoid searching for dirty pages just increment the page offset. all pages are dirty anyway. Signed-off-by: Peter Lieven --- arch_init.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/arch_init.c b/arch_init.c index abd54a7..45fcf4d 100644 --- a/arch_init.c +++ b/arch_init.c @@ -336,8 +336,14 @@ ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr, unsigned long nr = base + (start >> TARGET_PAGE_BITS); unsigned long size = base + (int128_get64(mr->size) >> TARGET_PAGE_BITS); - unsigned long next = find_next_bit(migration_bitmap, size, nr); - + unsigned long next; + + if (ram_bulk_stage) { + next = nr + 1; + } else { + next = find_next_bit(migration_bitmap, size, nr); + } + if (next < size) { clear_bit(next, migration_bitmap); migration_dirty_pages--; -- 1.7.9.5