From 2f43ad4af98a7f1a6fa70b15ffa0bd29ce777418 Mon Sep 17 00:00:00 2001
From: Tom Kistner <tom@duncanthrax.net>
Date: Wed, 20 Dec 2006 19:54:23 +0000
Subject: [PATCH] BugZilla 438

---
 src/OS/os.h-Linux | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/OS/os.h-Linux b/src/OS/os.h-Linux
index 5b731eaa1..8d87df0b8 100644
--- a/src/OS/os.h-Linux
+++ b/src/OS/os.h-Linux
@@ -1,4 +1,4 @@
-/* $Cambridge: exim/src/OS/os.h-Linux,v 1.4 2006/10/30 22:06:33 tom Exp $ */
+/* $Cambridge: exim/src/OS/os.h-Linux,v 1.5 2006/12/20 19:54:23 tom Exp $ */
 
 /* Exim: OS-specific C header file for Linux */
 
@@ -7,10 +7,16 @@
 #define HAVE_MMAP
 #define HAVE_BSD_GETLOADAVG
 #define HAVE_SYS_STATVFS_H
-#define HAVE_LINUX_SENDFILE
 #define NO_IP_VAR_H
 #define SIG_IGN_WORKS
 
+/* When using the experimental Domainkeys/DKIM extensions, setting
+HAVE_LINUX_SENDFILE can increase performance on outgoing mail a bit.
+Note: With older glibc versions this setting will conflict with the
+_FILE_OFFSET_BITS=64 setting defined as part of the Linux CFLAGS. */
+
+/* #define HAVE_LINUX_SENDFILE */
+
 #define F_FREESP     O_TRUNC
 typedef struct flock flock_t;
 
-- 
2.30.2