chore: upgrade flashinfer v0.2.9rc1 (#8301)

Co-authored-by: Yineng Zhang <me@zhyncs.com>

python/pyproject.toml

@@ -60,7 +60,7 @@ srt = [
     "torchvision==0.22.1",
     "cuda-python",
     "einops",
-    "flashinfer_python==0.2.7.post1",
+    "flashinfer_python==0.2.9rc1",
 ]
 
 blackwell = [
@@ -71,7 +71,7 @@ blackwell = [
     "torchvision==0.22.1",
     "cuda-python",
     "einops",
-    "flashinfer_python==0.2.7.post1",
+    "flashinfer_python==0.2.9rc1",
 ]
 
 # HIP (Heterogeneous-computing Interface for Portability) for AMD

python/sglang/srt/entrypoints/engine.py

@@ -646,7 +646,7 @@ def _set_envs_and_config(server_args: ServerArgs):
     if server_args.attention_backend == "flashinfer":
         assert_pkg_version(
             "flashinfer_python",
-            "0.2.7.post1",
+            "0.2.9rc1",
             "Please uninstall the old version and "
             "reinstall the latest version by following the instructions "
             "at https://docs.flashinfer.ai/installation.html.",