explain workdaround

trixi-framework · Aug 30, 2024 · cc1147d · cc1147d
1 parent ed2540d
commit cc1147d
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/src/auxiliary/math.jl b/src/auxiliary/math.jl
@@ -284,6 +284,11 @@ end
 # when using `@fastmath`, which we also get from
 # [Fortran](https://godbolt.org/z/Yrsa1js7P)
 # or [C++](https://godbolt.org/z/674G7Pccv).
+#
+# Note however that such a custom reimplementation can cause incompatibilites with other
+# packages. Currently we are affected by an issue with MPI.jl on ARM, see
+# https://github.com/trixi-framework/Trixi.jl/issues/1922
+# The workaround is to resort to Base.min / Base.max when using MPI reductions.
 """
     Trixi.max(x, y, ...)