From aa1da121bc928759c9cfd9cad011193ddb0343a0 Mon Sep 17 00:00:00 2001
From: Arvid Norberg <arvid@libtorrent.org>
Date: Sat, 24 Jul 2010 02:54:42 +0000
Subject: [PATCH] attempt to support disk IO priority on linux

---
 src/disk_io_thread.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/disk_io_thread.cpp b/src/disk_io_thread.cpp
index cfe3631d9..c0a2277c8 100644
--- a/src/disk_io_thread.cpp
+++ b/src/disk_io_thread.cpp
@@ -59,6 +59,10 @@ POSSIBILITY OF SUCH DAMAGE.
 #include <sys/resource.h>
 #endif
 
+#ifdef TORRENT_LINUX
+#include <linux/unistd.h>
+#endif
+
 namespace libtorrent
 {
 	bool should_cancel_on_abort(disk_io_job const& j);
@@ -1751,6 +1755,8 @@ namespace libtorrent
 #if defined __APPLE__ && defined __MACH__ && MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
 					setiopolicy_np(IOPOL_TYPE_DISK, IOPOL_SCOPE_THREAD
 						, m_settings.low_prio_disk ? IOPOL_THROTTLE : IOPOL_DEFAULT);
+#elif defined IOPRIO_WHO_PROCESS
+					syscall(ioprio_set, IOPRIO_WHO_PROCESS, getpid());
 #endif
 					if (m_settings.cache_size == -1)
 					{