[Mesa-dev] [PATCH] anv: change BLOCK_POOL_MEMFD_SIZE to 1GB

[Tapani Pälli]

This allows us to run 32bit Vulkan apps on Android, ftruncate
call would fail on 2GB (max size being 2GB - 1).

Signed-off-by: Tapani Pälli <tapani.palli at intel.com>
---
history: we had some discussion about this some weeks back and Jason
proposed to simply set the size to 1GB:

https://lists.freedesktop.org/archives/mesa-dev/2017-March/147396.html

 src/intel/vulkan/anv_private.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/intel/vulkan/anv_private.h b/src/intel/vulkan/anv_private.h
index 27c887c..85029da 100644
--- a/src/intel/vulkan/anv_private.h
+++ b/src/intel/vulkan/anv_private.h
@@ -377,8 +377,8 @@ struct anv_block_pool {
    struct anv_block_state back_state;
 };
 
-/* Block pools are backed by a fixed-size 2GB memfd */
-#define BLOCK_POOL_MEMFD_SIZE (1ul << 31)
+/* Block pools are backed by a fixed-size 1GB memfd */
+#define BLOCK_POOL_MEMFD_SIZE (1ul << 30)
 
 /* The center of the block pool is also the middle of the memfd.  This may
  * change in the future if we decide differently for some reason.
-- 
2.9.3