commit 20845c58bf1003225241dcefb47d7d71013aa432
Author: Andrew Beekhof <andrew@beekhof.net>
Date:   Fri Oct 18 12:20:29 2013 +1100

    Fix: ipc: Use the higher of the configured buffer size or the default
    
    (cherry picked from commit 87a34aa975ae2a114e964e3dd9c3c84a937c1979)

diff --git a/lib/common/ipc.c b/lib/common/ipc.c
index 451bda5..435b392 100644
--- a/lib/common/ipc.c
+++ b/lib/common/ipc.c
@@ -681,22 +681,19 @@ struct crm_ipc_s {
 static int
 pick_ipc_buffer(int max)
 {
-    const char *env = getenv("PCMK_ipc_buffer");
+    static int global_max = 0;
 
-    if (env) {
-        max = crm_parse_int(env, "0");
-    }
-
-    if (max <= 0) {
-        max = MAX_MSG_SIZE;
-    }
+    if(global_max == 0) {
+        const char *env = getenv("PCMK_ipc_buffer");
 
-    if (max < MIN_MSG_SIZE) {
-        max = MIN_MSG_SIZE;
+        if (env) {
+            global_max = crm_parse_int(env, "0");
+        } else {
+            global_max = MAX_MSG_SIZE;
+        }
     }
 
-    crm_trace("Using max message size of %d", max);
-    return max;
+    return QB_MAX(max, global_max);
 }
 
 crm_ipc_t *