update PIPE_CAPA documentation for Linux 2.6.35

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/io/splice.rb b/lib/io/splice.rb
index 3a72239..25ef653 100644
--- a/lib/io/splice.rb
+++ b/lib/io/splice.rb
@@ -8,10 +8,13 @@ class IO
     # the version of IO::Splice, currently 0.1.0
     VERSION = '1.0.0'
 
-    # The maximum capacity of the pipe in bytes.
+    # The maximum default capacity of the pipe in bytes.
     # Under stock Linux, this is 65536 bytes as of 2.6.11, and 4096 before
     # We detect this at runtime as it is easy to recompile the kernel
     # and set a new value.
+    # Starting with Linux 2.6.35, pipe capacity will be tunable
+    # and this will only represent the default capacity of a
+    # newly-created pipe.
     PIPE_CAPA = begin
       rd, wr = IO.pipe
       buf = ' ' * PIPE_BUF