From 3388098fcc0ad86c82a7c4362a38a8fabb7d2bab Mon Sep 17 00:00:00 2001
From: Simon Cruanes <simon.cruanes.2007@m4x.org>
Date: Wed, 26 Jun 2024 11:30:29 -0400
Subject: [PATCH] smol comment on OCaml 4

---
 README.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/README.md b/README.md
index 20264fcb..2c7e88de 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,9 @@ In addition, some concurrency and parallelism primitives are provided:
     provides the fork-join parallelism primitives
     to use within tasks running in the pool.
 
+On OCaml 4.xx, there is only one domain; all threads run on it, but the
+pool abstraction is still useful to provide preemptive concurrency.
+
 ## Usage
 
 The user can create several thread pools (implementing the interface `Runner.t`).