[intel] Move bufmgr back to context instead of screen, fixing glthreads.

Putting the bufmgr in the screen is not thread-safe since the emit_reloc
changes.  It also led to a significant performance hit from pthread usage
for the attempted thread-safety (up to 12% of a cpu spent on refcounting
protection in single-threaded 965).  The motivation had been to allow
multi-context bufmgr sharing in classic mode, but it wasn't worth the cost.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_bufmgr_ttm.c b/src/mesa/drivers/dri/intel/intel_bufmgr_ttm.c
index e1c56afe5b..2ec0241af4 100644
--- a/src/mesa/drivers/dri/intel/intel_bufmgr_ttm.c
+++ b/src/mesa/drivers/dri/intel/intel_bufmgr_ttm.c
@@ -560,6 +560,8 @@ intel_ttm_bo_create_from_handle(dri_bufmgr *bufmgr, const char *name,
 
     ret = drmBOReference(ttm_bufmgr->fd, handle, &ttm_buf->drm_bo);
     if (ret != 0) {
+       fprintf(stderr, "Couldn't reference %s handle 0x%08x: %s\n",
+	       name, handle, strerror(-ret));
 	free(ttm_buf);
 	return NULL;
     }