From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53368) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bFoBA-00017U-K2 for qemu-devel@nongnu.org; Wed, 22 Jun 2016 15:51:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bFoB8-0004Z2-Py for qemu-devel@nongnu.org; Wed, 22 Jun 2016 15:51:15 -0400 From: John Snow Date: Wed, 22 Jun 2016 15:51:01 -0400 Message-Id: <1466625064-11280-1-git-send-email-jsnow@redhat.com> Subject: [Qemu-devel] [PATCH 0/3] drive-mirror: limit niov to MAX_IOV List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org Cc: kwolf@redhat.com, jcody@redhat.com, famz@redhat.com, qemu-devel@nongnu.org, mreitz@redhat.com, John Snow e5b43573 caused a regression in the preparation of our IO vectors, such that if a small granularity but a large buffer size is chosen, we may accidentally exceed MAX_IOV and the request will fail. This has been fixed before in cae98cb8, and now we'll fix it again. To keep it fixed, we'll add an iotest this time. [Thanks to Max for finding the root cause.] John Snow (3): mirror: clarify mirror_do_read return code mirror: limit niov to IOV_MAX elements, again iotests: add small-granularity mirror test block/mirror.c | 10 ++++++++-- tests/qemu-iotests/041 | 30 ++++++++++++++++++++++++++++++ tests/qemu-iotests/041.out | 4 ++-- 3 files changed, 40 insertions(+), 4 deletions(-) -- 2.4.11