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-rw-r--r--lib/dtas/buffer/read_write.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/dtas/buffer/read_write.rb b/lib/dtas/buffer/read_write.rb
index 56eb8a1..a27b823 100644
--- a/lib/dtas/buffer/read_write.rb
+++ b/lib/dtas/buffer/read_write.rb
@@ -4,6 +4,8 @@ require 'io/nonblock'
 require_relative '../../dtas'
 require_relative '../pipe'
 
+# compatibility code for systems lacking "splice" support via the
+# "io-splice" RubyGem.  Used only by -player
 module DTAS::Buffer::ReadWrite # :nodoc:
   MAX_AT_ONCE = 512 # min PIPE_BUF value in POSIX
   attr_accessor :buffer_size