1 files changed, 5 insertions, 0 deletions
diff --git a/NEWS b/NEWS
index c3110a37f..9f55cbb6e 100644
--- a/NEWS
+++ b/NEWS
@@ -13,6 +13,11 @@ GNU coreutils NEWS                                    -*- outline -*-
   sort -u with at least two threads could attempt to read through a
   corrupted pointer. [bug introduced in coreutils-8.6]
 
+  sort with at least two threads and with blocked output would busy-loop
+  (spinlock) all threads, often using 100% of available CPU cycles to
+  do no work.  I.e., "sort < big-file | less" could waste a lot of power.
+  [bug introduced in coreutils-8.6]
+
 ** New features
 
   split accepts the --number option to generate a specific number of files.