From: Eric Wong <normalperson-rMlxZR9MS24@public.gmane.org>
To: rainbows-talk-GrnCvJ7WPxnNLxjTenLetw@public.gmane.org
Subject: [PATCH] doc: recommend io_splice 4.1.1 or later
Date: Tue, 17 May 2011 17:43:59 -0700 [thread overview]
Message-ID: <20110518004359.GA21599@dcvr.yhbt.net> (raw)
I just pushed this out to rainbows.git and updated the website:
>From 5e4f790847198e1267b2fbd5decfa09e5cc3d618 Mon Sep 17 00:00:00 2001
From: Eric Wong <normalperson-rMlxZR9MS24@public.gmane.org>
Date: Tue, 17 May 2011 17:38:12 -0700
Subject: [PATCH] doc: recommend io_splice 4.1.1 or later
io_splice 4.1.1 works around issues with socket
buffers filling up pipe buffers on blocking splice.
See http://lkml.org/lkml/2009/1/13/478 for a better
explanation.
---
lib/rainbows/configurator.rb | 4 +++-
t/test_isolate.rb | 2 +-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/lib/rainbows/configurator.rb b/lib/rainbows/configurator.rb
index a1d90cb..1b93fc7 100644
--- a/lib/rainbows/configurator.rb
+++ b/lib/rainbows/configurator.rb
@@ -190,7 +190,9 @@ module Rainbows::Configurator
# end
#
# Keep in mind that splice(2) itself is a relatively new system call
- # and has been buggy in many older Linux kernels.
+ # and has been buggy in many older Linux kernels. If you're proxying
+ # the output of sockets to the client, be sure to use "io_splice"
+ # 4.1.1 or later to avoid stalling responses.
#
# Default: IO on Ruby 1.9+, false otherwise
def copy_stream(klass)
diff --git a/t/test_isolate.rb b/t/test_isolate.rb
index fe2aebc..562f1b6 100644
--- a/t/test_isolate.rb
+++ b/t/test_isolate.rb
@@ -41,7 +41,7 @@ Isolate.now!(opts) do
gem 'sleepy_penguin', '2.0.0'
# is 2.6.32 new enough?
- gem 'io_splice', '4.1.0' if `uname -r`.strip > '2.6.32'
+ gem 'io_splice', '4.1.1' if `uname -r`.strip > '2.6.32'
end
end
--
Eric Wong
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