diff --git a/Changelog.txt b/Changelog.txt
index c222c7eee..019870d8c 100644
--- a/Changelog.txt
+++ b/Changelog.txt
@@ -1,4 +1,12 @@
 OpenBLAS ChangeLog
+====================================================================
+Version 0.2.1
+30-Jun-2012
+common:
+x86/x86-64:
+	* Fixed the SEGFAULT bug about hyper-theading
+	* Support AMD Bulldozer by using GotoBLAS2 AMD Barcelona codes
+
 ====================================================================
 Version 0.2.0
 26-Jun-2012
diff --git a/Makefile.rule b/Makefile.rule
index 299273773..082487835 100644
--- a/Makefile.rule
+++ b/Makefile.rule
@@ -3,7 +3,7 @@
 #
 
 # This library's version
-VERSION = 0.2.0
+VERSION = 0.2.1
 
 # If you set the suffix, the library name will be libopenblas_$(LIBNAMESUFFIX).a
 # and libopenblas_$(LIBNAMESUFFIX).so. Meanwhile, the soname in shared library 
diff --git a/README.md b/README.md
index 82e9f528c..52d098366 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,7 @@ Please read GotoBLAS_01Readme.txt
 - **Intel Xeon 56xx (Westmere)**: Used GotoBLAS2 Nehalem codes.
 - **Intel Sandy Bridge**: Optimized Level-3 BLAS with AVX on x86-64.
 - **AMD Bobcat**: Used GotoBLAS2 Barcelona codes.
+- **AMD Bulldozer**: Used GotoBLAS2 Barcelona codes.
 
 #### MIPS64:
 - **ICT Loongson 3A**: Optimized Level-3 BLAS and the part of Level-1,2.
diff --git a/cpuid.h b/cpuid.h
index fdcfcea00..bb57ad92d 100644
--- a/cpuid.h
+++ b/cpuid.h
@@ -105,6 +105,7 @@
 #define CORE_NANO	19
 #define CORE_SANDYBRIDGE 20
 #define CORE_BOBCAT     21
+#define CORE_BULLDOZER  22
 
 #define HAVE_SSE      (1 <<  0)
 #define HAVE_SSE2     (1 <<  1)
@@ -193,4 +194,5 @@ typedef struct {
 #define CPUTYPE_NANO			43
 #define CPUTYPE_SANDYBRIDGE             44
 #define CPUTYPE_BOBCAT                  45
+#define CPUTYPE_BULLDOZER               46
 #endif
diff --git a/cpuid_x86.c b/cpuid_x86.c
index 204f41d51..ea1162e8f 100644
--- a/cpuid_x86.c
+++ b/cpuid_x86.c
@@ -1027,6 +1027,7 @@ int get_cpuname(void){
 	return CPUTYPE_OPTERON;
       case  1:
       case 10:
+      case  6:   //AMD Bulldozer Opteron 6200 / Opteron 4200 / AMD FX-Series
 	return CPUTYPE_BARCELONA;
       case  5:
 	return CPUTYPE_BOBCAT;
@@ -1151,6 +1152,7 @@ static char *cpuname[] = {
   "NANO",
   "SANDYBRIDGE",
   "BOBCAT",
+  "BULLDOZER",
 };
 
 static char *lowercpuname[] = {
@@ -1199,6 +1201,7 @@ static char *lowercpuname[] = {
   "nano",
   "sandybridge",
   "bobcat",
+  "bulldozer",
 };
 
 static char *corename[] = {
@@ -1224,6 +1227,7 @@ static char *corename[] = {
   "NANO",
   "SANDYBRIDGE",
   "BOBCAT",
+  "BULLDOZER",
 };
 
 static char *corename_lower[] = {
@@ -1249,6 +1253,7 @@ static char *corename_lower[] = {
   "nano",
   "sandybridge",
   "bobcat",
+  "bulldozer",
 };
 
 
@@ -1359,6 +1364,7 @@ int get_coretype(void){
     if (family == 0xf){
       if ((exfamily == 0) || (exfamily == 2)) return CORE_OPTERON; 
       else if (exfamily == 5) return CORE_BOBCAT; 
+      else if (exfamily == 6) return CORE_BARCELONA;  //AMD Bulldozer Opteron 6200 / Opteron 4200 / AMD FX-Series
       else return CORE_BARCELONA;
     }
   }
diff --git a/driver/others/init.c b/driver/others/init.c
index 4a6f0aae8..f6924d5f4 100644
--- a/driver/others/init.c
+++ b/driver/others/init.c
@@ -447,6 +447,9 @@ static void disable_hyperthread(void) {
 
     //When the shared cpu are in different element of share & avail array, this may be a bug.
     for (i = 0; i < count ; i++){
+
+      share[i] &= common->avail[i];
+
       if (popcount(share[i]) > 1) {
       
 #ifdef DEBUG
diff --git a/getarch.c b/getarch.c
index 7e08e774e..5916a9a04 100644
--- a/getarch.c
+++ b/getarch.c
@@ -102,6 +102,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /* #define FORCE_BARCELONA	*/
 /* #define FORCE_SHANGHAI	*/
 /* #define FORCE_ISTANBUL	*/
+/* #define FORCE_BULLDOZER	*/
 /* #define FORCE_BOBCAT	*/
 /* #define FORCE_SSE_GENERIC	*/
 /* #define FORCE_VIAC3		*/
@@ -349,7 +350,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define CORENAME  "OPTERON"
 #endif
 
-#if defined(FORCE_BARCELONA) || defined(FORCE_SHANGHAI) || defined(FORCE_ISTANBUL)
+#if defined(FORCE_BARCELONA) || defined(FORCE_SHANGHAI) || defined(FORCE_ISTANBUL) || defined (FORCE_BULLDOZER)
 #define FORCE
 #define FORCE_INTEL
 #define ARCHITECTURE    "X86"
@@ -357,8 +358,8 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define ARCHCONFIG   "-DBARCELONA " \
 		     "-DL1_DATA_SIZE=65536 -DL1_DATA_LINESIZE=64 " \
 		     "-DL2_SIZE=524288 -DL2_LINESIZE=64  -DL3_SIZE=2097152 " \
-		     "-DDTB_DEFAULT_ENTRIES=48 -DDTB_SIZE=4096 -DHAVE_3DNOW " \
-		     "-DHAVE_3DNOWEX -DHAVE_MMX -DHAVE_SSE -DHAVE_SSE2 -DHAVE_SSE3 " \
+		     "-DDTB_DEFAULT_ENTRIES=48 -DDTB_SIZE=4096 " \
+		     "-DHAVE_MMX -DHAVE_SSE -DHAVE_SSE2 -DHAVE_SSE3 " \
 		     "-DHAVE_SSE4A -DHAVE_MISALIGNSSE -DHAVE_128BITFPU -DHAVE_FASTMOVU"
 #define LIBNAME   "barcelona"
 #define CORENAME  "BARCELONA"