From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51494) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZfU7E-00010j-K3 for qemu-devel@nongnu.org; Fri, 25 Sep 2015 10:36:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZfU7A-0007ZW-EH for qemu-devel@nongnu.org; Fri, 25 Sep 2015 10:36:48 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33545) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZfU7A-0007ZQ-9A for qemu-devel@nongnu.org; Fri, 25 Sep 2015 10:36:44 -0400 From: Igor Mammedov Date: Fri, 25 Sep 2015 15:53:10 +0200 Message-Id: <1443189192-108681-1-git-send-email-imammedo@redhat.com> Subject: [Qemu-devel] [PATCH 0/2] ps: memhp: enforce gaps between DIMMs List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: pkrempa@redhat.com, ehabkost@redhat.com, mst@redhat.com, bharata@linux.vnet.ibm.com, pbonzini@redhat.com, david@gibson.dropbear.id.au it's a simplier way suggested by Michael S. Tsirkin to workaround virtio bug reported earlier: http://lists.nongnu.org/archive/html/qemu-devel/2015-08/msg00522.html where virtio can't handle buffer that crosses border between 2 DIMM's (i.e. 2 MemoryRegions). idea is to leave gaps between DIMMs, making their GPAs non contiguous, which effectively forces kmalloc to not use DIMM if buffer doesn't fit inside of it. Igor Mammedov (2): memhp: extend address auto assignment to support gaps pc: memhp: force gaps between DIMM's GPA hw/i386/pc.c | 4 +++- hw/i386/pc_piix.c | 3 +++ hw/i386/pc_q35.c | 3 +++ hw/mem/pc-dimm.c | 13 +++++++------ hw/ppc/spapr.c | 2 +- include/hw/i386/pc.h | 2 ++ include/hw/mem/pc-dimm.h | 7 ++++--- 7 files changed, 23 insertions(+), 11 deletions(-) -- 1.8.3.1