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[RFC,v0,2/2] spapr: Force gaps between DIMM's GPA

Message ID 1444034124-28747-3-git-send-email-bharata@linux.vnet.ibm.com
State New
Headers show

Commit Message

Bharata B Rao Oct. 5, 2015, 8:35 a.m. UTC 
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 <mst@redhat.com>
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
---
 hw/ppc/spapr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 2ec509b..a8526e9 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -2127,7 +2127,7 @@  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;
     }