threading changelog entry

diff --git a/doc/news/changes/major/20200529various b/doc/news/changes/major/20200529various
new file mode 100644 (file)
index 0000000..5da415f
--- /dev/null
+++ b/doc/news/changes/major/20200529various
@@ -0,0 +1,7 @@
+New: The multithreading framework in the library has been completely revamped:
+Intel TBB has been replaced by cpp-taskflow, which is bundled within the
+library. Multithreading support is now unconditionally enabled and we removed
+the CMake option DEAL_II_WITH_THREADS. The tasking framework can be controlled
+using MultithreadInfo and the DEAL_II_NUM_THREADS environment variable.
+<br>
+(Wolfgang Bangerth, Timo Heister, Matthias Maier, 2020/05/25)