acrn-config: remove rootfs item from PRE Launched VM

The bootarg of rootfs for pre-launched VM is for Linux only and it
should not limited to physical block device which is selectable from
native rootfs list, it might be a USB or RAM device that "X" is variable
in root=/dev/sdX or /dev/ramX. So remove the rootfs setting in XML and
leave it configured in kernel bootargs directly.
Given the SOS must be Linux and its rootfs must be a physical block
device, rootfs item tag is still reserved in xml for SOS VM section.

Tracked-On: #4808
Signed-off-by: Wei Liu <weix.w.liu@intel.com>
Acked-by: Victor Sun <victor.sun@intel.com>

misc/acrn-config/library/scenario_cfg_lib.py

@@ -434,20 +434,6 @@ def os_kern_entry_addr_check(id_kern_entry_addr_dic, prime_item, item):
             ERR_LIST[key] = "VM os config kernel entry address should Hex format"
 
 
-def os_kern_root_dev_check(id_kern_rootdev_dic, prime_item, item):
-    """
-    Check os kernel rootfs partitions
-    :param prime_item: the prime item in xml file
-    :param item: vm os config rootdev item in xml
-    :return: None
-    """
-
-    for id_key, kern_rootdev in id_kern_rootdev_dic.items():
-        if not kern_rootdev:
-            key = "vm:id={},{},{}".format(id_key, prime_item, item)
-            ERR_LIST[key] = "VM os config kernel root device should not empty"
-
-
 def pci_devs_check(pci_bdf_devs, branch_tag, tag_str):
     """
     Check vm pci devices

misc/acrn-config/scenario_config/scenario_cfg_gen.py

@@ -54,9 +54,6 @@ def get_scenario_item_values(board_info, scenario_info):
     # pre board_private
     (scenario_item_values["vm,board_private,rootfs"], num) = board_cfg_lib.get_rootfs(board_info)
 
-    # os config
-    (scenario_item_values["vm,os_config,rootfs"], num) = board_cfg_lib.get_rootfs(board_info)
-
     scenario_item_values["hv,DEBUG_OPTIONS,RELEASE"] = hv_cfg_lib.N_Y
     scenario_item_values["hv,DEBUG_OPTIONS,NPK_LOGLEVEL"] = hv_cfg_lib.get_select_range("DEBUG_OPTIONS", "LOG_LEVEL")
     scenario_item_values["hv,DEBUG_OPTIONS,MEM_LOGLEVEL"] = hv_cfg_lib.get_select_range("DEBUG_OPTIONS", "LOG_LEVEL")

misc/acrn-config/scenario_config/scenario_item.py

@@ -76,8 +76,6 @@ class CfgOsKern:
     kern_console = {}
     kern_load_addr = {}
     kern_entry_addr = {}
-    kern_root_dev = {}
-    kern_args_append = {}
     ramdisk_mod = {}
 
     def __init__(self, scenario_file):
@@ -101,12 +99,8 @@ class CfgOsKern:
             self.scenario_info, "os_config", "kern_load_addr")
         self.kern_entry_addr = common.get_leaf_tag_map(
             self.scenario_info, "os_config", "kern_entry_addr")
-        self.kern_root_dev = common.get_leaf_tag_map(
-            self.scenario_info, "os_config", "rootfs")
         self.ramdisk_mod = common.get_leaf_tag_map(
             self.scenario_info, "os_config", "ramdisk_mod")
-        self.kern_args_append = common.get_leaf_tag_map(
-            self.scenario_info, "boot_private", "bootargs")
 
     def check_item(self):
         """
@@ -120,7 +114,6 @@ class CfgOsKern:
         scenario_cfg_lib.os_kern_console_check(self.kern_console, "DEBUG_OPTIONS", "SERIAL_CONSOLE")
         scenario_cfg_lib.os_kern_load_addr_check(self.kern_load_addr, "os_config", "kern_load_addr")
         scenario_cfg_lib.os_kern_entry_addr_check(self.kern_entry_addr, "os_config", "kern_entry_addr")
-        scenario_cfg_lib.os_kern_root_dev_check(self.kern_root_dev, "os_config", "rootdev")
 
 
 class VuartInfo:

misc/acrn-config/scenario_config/vm_configurations_c.py

@@ -308,7 +308,6 @@ def gen_pre_launch_vm(vm_type, vm_i, vm_info, config):
     if vm_i in vm_info.os_cfg.kern_args.keys() and vm_info.os_cfg.kern_args[vm_i]:
         print("\t\t\t.bootargs = VM{0}_CONFIG_OS_BOOTARG_CONSOLE\t\\".format(vm_i), file=config)
         print("\t\t\t\tVM{0}_CONFIG_OS_BOOTARG_MAXCPUS\t\t\\".format(vm_i), file=config)
-        print("\t\t\t\tVM{0}_CONFIG_OS_BOOTARG_ROOT\t\t\\".format(vm_i), file=config)
         split_cmdline(vm_info.os_cfg.kern_args[vm_i].strip(), config)
     print("\t\t},", file=config)
     # VUART

misc/acrn-config/scenario_config/vm_configurations_h.py

@@ -85,9 +85,6 @@ def gen_pre_launch_vm(vm_info, config):
                 vm_i, vm_info.mem_info.mem_start_hpa2[vm_i]), file=config)
             print("#define VM{0}_CONFIG_MEM_SIZE_HPA2\t\t{1}UL".format(
                 vm_i, vm_info.mem_info.mem_size_hpa2[vm_i]), file=config)
-        if vm_info.os_cfg.kern_root_dev:
-            print('#define VM{0}_CONFIG_OS_BOOTARG_ROOT\t\t"root={1} "'.format(
-                vm_i, vm_info.os_cfg.kern_root_dev[vm_i]), file=config)
 
         print('#define VM{0}_CONFIG_OS_BOOTARG_MAXCPUS\t\t"maxcpus={1} "'.format(vm_i, cpu_bits['cpu_num']), file=config)
         if vm_info.os_cfg.kern_console:

misc/acrn-config/xmls/config-xmls/apl-mrb/logical_partition.xml

@@ -76,9 +76,8 @@
         <kern_type desc="Specify the kernel image type so that hypervisor could load it correctly. Currently support KERNEL_BZIMAGE and KERNEL_ZEPHYR.">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel">/dev/mmcblk1p1</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
+        rw root=/dev/mmcblk1p1 rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>
     <vuart id="0">
@@ -127,9 +126,8 @@
         <kern_type desc="kernel name">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel" readonly="true">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
         consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>

misc/acrn-config/xmls/config-xmls/apl-up2-n3350/logical_partition.xml

@@ -76,9 +76,8 @@
         <kern_type desc="Specify the kernel image type so that hypervisor could load it correctly. Currently support KERNEL_BZIMAGE and KERNEL_ZEPHYR.">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>
     <vuart id="0">
@@ -126,9 +125,8 @@
         <kern_type desc="kernel name">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel" readonly="true">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
         consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>

misc/acrn-config/xmls/config-xmls/apl-up2/logical_partition.xml

@@ -77,9 +77,8 @@
         <kern_type desc="Specify the kernel image type so that hypervisor could load it correctly. Currently support KERNEL_BZIMAGE and KERNEL_ZEPHYR.">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>
     <vuart id="0">
@@ -128,9 +127,8 @@
         <kern_type desc="kernel name">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel" readonly="true">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
         consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>

misc/acrn-config/xmls/config-xmls/ehl-crb-b/logical_partition.xml

@@ -74,9 +74,8 @@
             <kern_type desc="Specify the kernel image type so that hypervisor could load it correctly. Currently support KERNEL_BZIMAGE and KERNEL_ZEPHYR.">KERNEL_BZIMAGE</kern_type>
             <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
             <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline." />
-            <rootfs desc="rootfs for Linux kernel">/dev/sda3</rootfs>
             <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
         </bootargs>
         </os_config>
         <vuart id="0">
@@ -126,9 +125,8 @@
             <kern_type desc="kernel name">KERNEL_BZIMAGE</kern_type>
             <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
             <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline." />
-            <rootfs desc="rootfs for Linux kernel" readonly="true">/dev/sda3</rootfs>
             <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
         consoleblank=0 tsc=reliable
         </bootargs>
         </os_config>

misc/acrn-config/xmls/config-xmls/generic/logical_partition.xml

@@ -78,9 +78,8 @@
         <kern_type desc="Specify the kernel image type so that hypervisor could load it correctly. Currently support KERNEL_BZIMAGE and KERNEL_ZEPHYR.">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>
     <vuart id="0">
@@ -130,9 +129,8 @@
         <kern_type desc="kernel name">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel" readonly="true">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
         consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>

misc/acrn-config/xmls/config-xmls/nuc6cayh/logical_partition.xml

@@ -77,9 +77,8 @@
         <kern_type desc="Specify the kernel image type so that hypervisor could load it correctly. Currently support KERNEL_BZIMAGE and KERNEL_ZEPHYR.">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>
     <vuart id="0">
@@ -128,9 +127,8 @@
         <kern_type desc="kernel name">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel" readonly="true">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
         consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>

misc/acrn-config/xmls/config-xmls/nuc7i7dnb/logical_partition.xml

@@ -77,9 +77,8 @@
         <kern_type desc="Specify the kernel image type so that hypervisor could load it correctly. Currently support KERNEL_BZIMAGE and KERNEL_ZEPHYR.">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>
     <vuart id="0">
@@ -129,9 +128,8 @@
         <kern_type desc="kernel name">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel" readonly="true">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
         consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>

misc/acrn-config/xmls/config-xmls/template/PRE_STD_VM.xml

@@ -26,7 +26,6 @@
         <kern_type desc="Specify the kernel image type so that hypervisor could load it correctly. Currently support KERNEL_BZIMAGE and KERNEL_ZEPHYR."></kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel"></rootfs>
         <bootargs desc="Specify kernel boot arguments"></bootargs>
     </os_config>
     <vuart id="0">

misc/acrn-config/xmls/config-xmls/whl-ipc-i5/logical_partition.xml

@@ -77,9 +77,8 @@
         <kern_type desc="Specify the kernel image type so that hypervisor could load it correctly. Currently support KERNEL_BZIMAGE and KERNEL_ZEPHYR.">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>
     <vuart id="0">
@@ -128,9 +127,8 @@
         <kern_type desc="kernel name">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel" readonly="true">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
         consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>

misc/acrn-config/xmls/config-xmls/whl-ipc-i7/logical_partition.xml

@@ -77,9 +77,8 @@
         <kern_type desc="Specify the kernel image type so that hypervisor could load it correctly. Currently support KERNEL_BZIMAGE and KERNEL_ZEPHYR.">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>
     <vuart id="0">
@@ -128,9 +127,8 @@
         <kern_type desc="kernel name">KERNEL_BZIMAGE</kern_type>
         <kern_mod desc="The tag for kernel image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline.">Linux_bzImage</kern_mod>
         <ramdisk_mod desc="The tag for ramdisk image which act as multiboot module, it must exactly match the module tag in GRUB multiboot cmdline."></ramdisk_mod>
-        <rootfs desc="rootfs for Linux kernel" readonly="true">/dev/sda3</rootfs>
         <bootargs desc="Specify kernel boot arguments">
-        rw rootwait noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
+        rw rootwait root=/dev/sda3 noxsave nohpet no_timer_check ignore_loglevel log_buf_len=16M
         consoleblank=0 tsc=reliable
         </bootargs>
     </os_config>