From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53938) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZkRVP-0004GQ-D7 for qemu-devel@nongnu.org; Fri, 09 Oct 2015 02:50:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZkRVM-0000B8-6A for qemu-devel@nongnu.org; Fri, 09 Oct 2015 02:50:15 -0400 Received: from e28smtp06.in.ibm.com ([122.248.162.6]:43762) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZkRVL-00009G-Ch for qemu-devel@nongnu.org; Fri, 09 Oct 2015 02:50:12 -0400 Received: from /spool/local by e28smtp06.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 9 Oct 2015 12:20:08 +0530 Received: from d28relay01.in.ibm.com (d28relay01.in.ibm.com [9.184.220.58]) by d28dlp03.in.ibm.com (Postfix) with ESMTP id 1849C125801F for ; Fri, 9 Oct 2015 12:19:49 +0530 (IST) Received: from d28av04.in.ibm.com (d28av04.in.ibm.com [9.184.220.66]) by d28relay01.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t996o4qT9306562 for ; Fri, 9 Oct 2015 12:20:05 +0530 Received: from d28av04.in.ibm.com (localhost [127.0.0.1]) by d28av04.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t996o4U9024142 for ; Fri, 9 Oct 2015 12:20:04 +0530 From: Bharata B Rao Date: Fri, 9 Oct 2015 12:20:00 +0530 Message-Id: <1444373400-18423-3-git-send-email-bharata@linux.vnet.ibm.com> In-Reply-To: <1444373400-18423-1-git-send-email-bharata@linux.vnet.ibm.com> References: <1444373400-18423-1-git-send-email-bharata@linux.vnet.ibm.com> Subject: [Qemu-devel] [RFC v1 2/2] spapr: Force gaps between DIMM's GPA List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: imammedo@redhat.com, mst@redhat.com, Bharata B Rao , david@gibson.dropbear.id.au Mapping DIMMs non contiguously allows to workaround virtio bug reported earlier: http://lists.nongnu.org/archive/html/qemu-devel/2015-08/msg00522.html In this case guest kernel doesn't allocate buffers that can cross DIMM boundary keeping each buffer local to a DIMM. Suggested-by: Michael S. Tsirkin Signed-off-by: Bharata B Rao --- hw/ppc/spapr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 4a901f0..a66833f 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -2137,7 +2137,7 @@ static void spapr_memory_plug(HotplugHandler *hotplug_dev, DeviceState *dev, goto out; } - pc_dimm_memory_plug(dev, &ms->hotplug_memory, mr, align, false, &local_err); + pc_dimm_memory_plug(dev, &ms->hotplug_memory, mr, align, true, &local_err); if (local_err) { goto out; } -- 2.1.0