From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43943) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zf9I8-0000Wk-CL for qemu-devel@nongnu.org; Thu, 24 Sep 2015 12:22:41 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zf9I7-00059B-Q1 for qemu-devel@nongnu.org; Thu, 24 Sep 2015 12:22:40 -0400 Received: from mail-qg0-x235.google.com ([2607:f8b0:400d:c04::235]:34727) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zf9I7-000594-Md for qemu-devel@nongnu.org; Thu, 24 Sep 2015 12:22:39 -0400 Received: by qgez77 with SMTP id z77so48702831qge.1 for ; Thu, 24 Sep 2015 09:22:39 -0700 (PDT) Sender: =?UTF-8?B?TWFyYy1BbmRyw6kgTHVyZWF1?= From: marcandre.lureau@redhat.com Date: Thu, 24 Sep 2015 18:22:06 +0200 Message-Id: <1443111741-4736-7-git-send-email-marcandre.lureau@redhat.com> In-Reply-To: <1443111741-4736-1-git-send-email-marcandre.lureau@redhat.com> References: <1443111741-4736-1-git-send-email-marcandre.lureau@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PATCH v5 06/21] vhost: document log resizing List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: haifeng.lin@huawei.com, mst@redhat.com, thibaut.collet@6wind.com, jasowang@redhat.com, pbonzini@redhat.com, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= From: Marc-André Lureau Signed-off-by: Marc-André Lureau --- hw/virtio/vhost.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index bf88618..7bc3862 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -364,6 +364,8 @@ static inline void vhost_dev_log_resize(struct vhost_dev* dev, uint64_t size) uint64_t log_base = (uintptr_t)log->log; int r; + /* inform backend of log switching, this must be done before + releasing the current log, to ensure no logging is lost */ r = dev->vhost_ops->vhost_call(dev, VHOST_SET_LOG_BASE, &log_base); assert(r >= 0); vhost_log_put(dev, true); -- 2.4.3