From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48826) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e41XL-00051Q-KY for qemu-devel@nongnu.org; Mon, 16 Oct 2017 05:18:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e41XF-0005Cy-Ue for qemu-devel@nongnu.org; Mon, 16 Oct 2017 05:18:15 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51966) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1e41XF-0005CQ-OP for qemu-devel@nongnu.org; Mon, 16 Oct 2017 05:18:09 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A62F0356D9 for ; Mon, 16 Oct 2017 09:18:07 +0000 (UTC) From: David Hildenbrand Date: Mon, 16 Oct 2017 11:18:02 +0200 Message-Id: <20171016091802.11532-1-david@redhat.com> Subject: [Qemu-devel] [PATCH v1] memory: call log_start after region_add List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Thomas Huth , Paolo Bonzini , David Hildenbrand It might be confusing for some listener implementations that implement both, region_add and log_start (e.g. KVM) if we call log_start before an actual region was added using region_add. This makes current KVM code trigger an assertion ("kvm_section_update_flags: error finding slot"). So let's just reverse the order instead of tolerating log_start on yet unknown regions. Reported-by: Thomas Huth Signed-off-by: David Hildenbrand --- memory.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/memory.c b/memory.c index 5e6351a6c1..f39b8592bf 100644 --- a/memory.c +++ b/memory.c @@ -2607,12 +2607,12 @@ static void listener_add_address_space(MemoryListener *listener, .offset_within_address_space = int128_get64(fr->addr.start), .readonly = fr->readonly, }; - if (fr->dirty_log_mask && listener->log_start) { - listener->log_start(listener, §ion, 0, fr->dirty_log_mask); - } if (listener->region_add) { listener->region_add(listener, §ion); } + if (fr->dirty_log_mask && listener->log_start) { + listener->log_start(listener, §ion, 0, fr->dirty_log_mask); + } } if (listener->commit) { listener->commit(listener); -- 2.13.5