From ac83d3b0d607f2bdc373365bc2f08f0cde023bf3 Mon Sep 17 00:00:00 2001
From: danieldg
Date: Tue, 2 Mar 2010 02:45:29 +0000
Subject: Don't try quite so hard to writev() the entire buffer in one go

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@12583 e03df62e-2008-0410-955e-edbf42e46eb7
---
 src/inspsocket.cpp | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'src/inspsocket.cpp')

diff --git a/src/inspsocket.cpp b/src/inspsocket.cpp
index 65b554006..e3b8f8c8a 100644
--- a/src/inspsocket.cpp
+++ b/src/inspsocket.cpp
@@ -216,6 +216,9 @@ void StreamSocket::DoRead()
 	}
 }
 
+/* Don't try to prepare huge blobs of data to send to a blocked socket */
+static const int MYIOV_MAX = IOV_MAX < 128 ? IOV_MAX : 128;
+
 void StreamSocket::DoWrite()
 {
 	if (sendq.empty())
@@ -330,11 +333,11 @@ void StreamSocket::DoWrite()
 		{
 			// Prepare a writev() call to write all buffers efficiently
 			int bufcount = sendq.size();
-		
-			// cap the number of buffers at IOV_MAX
-			if (bufcount > IOV_MAX)
+
+			// cap the number of buffers at MYIOV_MAX
+			if (bufcount > MYIOV_MAX)
 			{
-				bufcount = IOV_MAX;
+				bufcount = MYIOV_MAX;
 			}
 
 			int rv_max = 0;
-- 
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