- go to ext4 default format to support SSD disks better

build

@@ -23,7 +23,7 @@ old_packages=()
 
 # defaults for vm_img_mkfs
 vm_img_mkfs_ext4='mkfs.ext4 -m 0 -q -F'
-vm_img_tunefs_ext4='tune2fs -c 0 -O ^has_journal'
+vm_img_tunefs_ext4='tune2fs -c 0 -O ^has_journal -o nobarrier,discard'
 vm_img_mkfs_ext3='mkfs.ext3 -m 0 -q -F'
 vm_img_tunefs_ext3='tune2fs -c 0 -o journal_data_writeback'
 vm_img_mkfs_ext2='mkfs.ext2 -m 0 -q -F'
@@ -69,7 +69,7 @@ VM_KERNEL=
 VM_INITRD=
 VMDISK_ROOTSIZE=4096
 VMDISK_SWAPSIZE=1024
-VMDISK_FILESYSTEM=ext3
+VMDISK_FILESYSTEM=ext4
 # settings are for speed and not data safety, we format anyway on next run
 VMDISK_MOUNT_OPTIONS=__default
 VMDISK_CLEAN=
@@ -759,8 +759,7 @@ check_for_ppc()
     export VM_KERNEL=/boot/vmlinux
     export VM_INITRD=/boot/initrd
     if [ -z "$RUNNING_IN_VM" -a "$VM_TYPE" = "kvm" ];then
-	    cat /proc/mounts | grep "/hugetlbfs" &>/dev/null
-	    if [ "$?" != "0" ];then
+	    if ! grep "/hugetlbfs" /proc/mounts; then
 		echo "hugetlbfs is not mounted"
 		exit 1
 	    fi
@@ -770,13 +769,11 @@ check_for_ppc()
 		echo "please adjust nr_hugepages"
 		exit 1
 	    fi
-	    grep kvm_rma_count /proc/cmdline &>/dev/null
-	    if [ "$?" != "0" ];then
+	    if ! grep -q kvm_rma_count /proc/cmdline; then
 		echo "put kvm_rma_count=<VM number> to your boot options"
 		exit 1
 	    fi
-	    grep kvm_hpt_count /proc/cmdline &>/dev/null
-	    if [ "$?" != "0" ];then
+	    if ! grep -q kvm_hpt_count /proc/cmdline; then
 		echo "put kvm_hpt_count=<VM number> to your boot options"
 		exit 1
 	    fi
@@ -802,7 +799,6 @@ shopt -s nullglob
 
 if detect_vm_2nd_stage ; then
     set "/.build-srcdir/$SPECFILE"
-
 fi
 
 export PATH=$BUILD_DIR:/sbin:/usr/sbin:$PATH