diff -up numactl-2.0.6/libnuma.c.orig numactl-2.0.6/libnuma.c

--- numactl-2.0.6/libnuma.c.orig	2010-12-29 08:23:11.000000000 -0500

+++ numactl-2.0.6/libnuma.c	2011-01-04 16:10:58.514024338 -0500

@@ -1263,9 +1263,10 @@ numa_node_to_cpus_v1(int node, unsigned 

 	sprintf(fn, "/sys/devices/system/node/node%d/cpumap", node);

 	f = fopen(fn, "r");

 	if (!f || getdelim(&line, &len, '\n', f) < 1) {

-		numa_warn(W_nosysfs2,

-		   "/sys not mounted or invalid. Assuming one node: %s",

-			  strerror(errno));

+		if (f)

+			numa_warn(W_nosysfs2,

+			   "/sys not mounted or invalid. Assuming one node: %s",

+				  strerror(errno));

 		bitmask.maskp = (unsigned long *)mask;

 		bitmask.size  = buflen_needed * 8;

 		numa_bitmask_setall(&bitmask);

@@ -1341,13 +1342,15 @@ numa_node_to_cpus_v2(int node, struct bi

 	sprintf(fn, "/sys/devices/system/node/node%d/cpumap", node); 

 	f = fopen(fn, "r"); 

 	if (!f || getdelim(&line, &len, '\n', f) < 1) { 

-		numa_warn(W_nosysfs2,

-		   "/sys not mounted or invalid. Assuming one node: %s",

-			  strerror(errno)); 

-		numa_warn(W_nosysfs2,

-		   "(cannot open or correctly parse %s)", fn);

-		numa_bitmask_setall(mask);

-		err = -1;

+		if (f) {

+			numa_warn(W_nosysfs2,

+			   "/sys not mounted or invalid. Assuming one node: %s",

+				  strerror(errno)); 

+			numa_warn(W_nosysfs2,

+			   "(cannot open or correctly parse %s)", fn);

+			numa_bitmask_setall(mask);

+			err = -1;

+		}

 	} 

 	if (f)

 		fclose(f);