From 56f924533023e39edfda09cf1a9c47b4abfe57c7 Mon Sep 17 00:00:00 2001
From: behlendo <behlendo@7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c>
Date: Thu, 15 May 2008 17:32:41 +0000
Subject: Disable adaptive mutexs by default (always sleep), and while I'm at
 it add a module option for easy tuning.

git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@109 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
---
 modules/spl/spl-mutex.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'modules/spl')

diff --git a/modules/spl/spl-mutex.c b/modules/spl/spl-mutex.c
index 8ca1286e9..7fce77e8e 100644
--- a/modules/spl/spl-mutex.c
+++ b/modules/spl/spl-mutex.c
@@ -25,7 +25,7 @@
  * -1:         Spin until aquired or holder yeilds without dropping lock
  *  1-MAX_INT: Spin for N attempts before sleeping for lock
  */
-int mutex_spin_max = 100;
+int mutex_spin_max = 0;
 
 #ifdef DEBUG_MUTEX
 int mutex_stats[MUTEX_STATS_SIZE] = { 0 };
@@ -272,3 +272,5 @@ spl_mutex_fini(void)
         EXIT;
 }
 
+module_param(mutex_spin_max, int, 0644);
+MODULE_PARM_DESC(mutex_spin_max, "Spin a maximum of N times to aquire lock");
-- 
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