b=6279

r=adilger

require CONFIG_STACK_SIZE_16KB on i386 + x86_64 non-UML

build/autoconf/lustre-build-linux.m4

@@ -282,6 +282,27 @@ $3
 AC_DEFUN([LB_LINUX_TRY_MAKE],
 [LB_LINUX_COMPILE_IFELSE([AC_LANG_PROGRAM([[$1]], [[$2]])], [$3], [$4], [$5], [$6])])
 
+#
+# LB_LINUX_CONFIG_BIG_STACK
+#
+# check for big stack patch
+#
+AC_DEFUN([LB_LINUX_CONFIG_BIG_STACK],
+[if test "x$ARCH_UM" = "x" -a "x$linux25" = "xno" ; then
+	case $target_cpu in
+		i?86 | x86_64)
+			LB_LINUX_CONFIG([STACK_SIZE_16KB],[],[
+				LB_LINUX_CONFIG([STACK_SIZE_32KB],[],[
+					LB_LINUX_CONFIG([STACK_SIZE_64KB],[],[
+						AC_MSG_ERROR([Lustre requires that Linux is configured with at least a 16KB stack.])
+					])
+				])
+			])
+			;;
+	esac
+fi
+])
+
 #
 # LB_PROG_LINUX
 #
@@ -306,6 +327,8 @@ if test "x$ARCH_UM" = "x" ; then
 fi
 ])
 
+LB_LINUX_CONFIG_BIG_STACK
+
 # Portals tests
 LP_PROG_LINUX