Set max-cache-size expectations for low values

diff --git a/doc/arm/reference.rst b/doc/arm/reference.rst
index 9a2f4af1bac9611039126581f1327c4a8b795713..55af7b8b423f85ad6dacce7542830ed62a9a0c75 100644 (file)
--- a/doc/arm/reference.rst
+++ b/doc/arm/reference.rst
@@ -3095,6 +3095,11 @@ system.
        default value of that option (90% of physical memory for each
        individual cache) may lead to memory exhaustion over time.
 
+   .. note::
+
+       ``max-cache-size`` does not work reliably for the maximum
+       amount of memory of 100 MB or lower.
+
    Upon startup and reconfiguration, caches with a limited size
    preallocate a small amount of memory (less than 1% of
    ``max-cache-size`` for a given view). This preallocation serves as an