gl: updated glxext.h to version 27

[mesa.git] / src / gallium / winsys / drm / vmware / core / vmw_screen_pools.c

diff --git a/src/gallium/winsys/drm/vmware/core/vmw_screen_pools.c b/src/gallium/winsys/drm/vmware/core/vmw_screen_pools.c
index b1c24b0cb6a1bd139a92e73b768e67f65e5c8d3b..b9823d7857502fb50a3e47093877549955920672 100644 (file)
--- a/src/gallium/winsys/drm/vmware/core/vmw_screen_pools.c
+++ b/src/gallium/winsys/drm/vmware/core/vmw_screen_pools.c
@@ -53,14 +53,32 @@ vmw_pools_init(struct vmw_winsys_screen *vws)
       goto error;
 
    vws->pools.gmr_mm = mm_bufmgr_create(vws->pools.gmr,
-                                        16*1024*1024,
+                                        VMW_GMR_POOL_SIZE,
                                         12 /* 4096 alignment */);
    if(!vws->pools.gmr_mm)
       goto error;
 
+   /*
+    * GMR buffers are typically shortlived, but it's possible that at a given
+    * instance a buffer is mapped. So to avoid stalling we tell pipebuffer to
+    * forbid creation of buffers beyond half the GMR pool size,
+    *
+    * XXX: It is unclear weather we want to limit the total amount of temporary
+    * malloc memory used to backup unvalidated GMR buffers. On one hand it is
+    * preferrable to fail an allocation than exhausting the guest memory with
+    * temporary data, but on the other hand it is possible that a stupid
+    * application creates large vertex buffers and does not use them for a long
+    * time -- since the svga pipe driver only emits the DMA uploads when a
+    * buffer is used for drawing this would effectively disabling swapping GMR
+    * buffers to memory. So far, the preemptively flush already seems to keep
+    * total allocated memory within relatively small numbers, so we don't
+    * limit.
+    */
    vws->pools.gmr_fenced = fenced_bufmgr_create(
       vws->pools.gmr_mm,
-      vmw_fence_ops_create(vws));
+      vmw_fence_ops_create(vws),
+      VMW_GMR_POOL_SIZE/2,
+      ~0);
 
 #ifdef DEBUG
    vws->pools.gmr_fenced = pb_debug_manager_create(vws->pools.gmr_fenced,