First of all, thanks Superhai,
Followings is his posting.
- DTrace
dtrace_dof_mode - Set DTrace DOF modes {0/1/2/3}
DisableFBT - Disable FBT {1}
IgnoreFBTBlacklist - Ignore blacklist of certain critical modules {1}
- BSD
-b - Don't run /etc/rc.boot
-l - Log leaks
srv - Boot as server {1}
ncl - Number of clusters
nbuf - Number of buffers for bsd
kmem - Kernel memory access {1}
trace - Kernel trace buffer size
msgbuf - Message Buffer
rp - Root path
mcache_flags - Memory cache flags
mbuf_debug - MBuf Debug {1}
initmcl - Init mbuf clusters
socket_debug - Socket debug (net)
net_affinity - Net Affinity (net)
rte_debug - Route debug (net) {flags}
-rwroot_hack - Mount root read/write
- IOKit
mseg - Max segment
dart - Remove mapper present
io - IO Kit Debug
- Mach
keepsyms - Do not unload KLD/Address-symbol translation {1}
debug - Kernel debug {flags}
nvram_paniclog - commit paniclog to NVRAM {1}
pmsafe_debug - Put CPUs into "safe" power mode {1}
preempt - Set default preemption rate
unsafe - Max unsafe quanta
poll - Max poll quanta
yield - Schedule poll yield shift
idlehalt - Halt idle thread to allow cpu into lowpower mode {1}
panic_io_port - In a panic read from this I/O port {0x0 to 0xffff}
_fpu - Limit boot-time cpu features {387/mmx/sse}
diag - Diagnostic output
serial - Serial diagnostic console
maxmem - Maximum memory to use
cpus -Numbers of cpus
himemory_mode - Set memorymode for over 4GB {0 - All pages available/1- disable high mem/2 - prefer high mem}
immediate_NMI - Force immediate NMI debugger {1}
-legacy - Force legacy 32bit mode
lcks - Lock statistics
novmx - No altivec emulation in Rosetta {1}
max_valid_dma_addr - Max valid DMA address
maxbouncepool - Max bounce pool size
maxloreserve - Max low reserve
npvhash - Physical to virtual mapping hash
wpkernel - Write protect kernel {1}
-no_shared_cr3 - Disable shared kernel address space for 64 bit users
-pmap_trace - Enable kernel traces for pmap
_panicd_ip - IP of panic server
_router_ip - IP of router
panicd_port - Port of panic server
-zc - Free zone element checking
mtxspin - Mutex spin (ppc)
vmmforce - VMM force (ppc)
fn - Force nap (ppc) (acpi) {0/1/2}
pmsx - Experimental power management stepper mode (ppc) {1}
ctrc - Set tracing to specific cpu (ppc)
tb - Non-default trace buffer size (ppc)
wcte - Write combine timer enable (ppc)
mcklog - Clear machine check flag (ppc)
mcksoft - Machine check software recovery (ppc)
ht_shift - Non-default hash table size (ppc) {1}
zsize - Target zone size
colors - Set VM colors
fill - Fill pages
serialbaud - Set serial baud rate
- Boot
-v - Verbose Mode
-x - Safe Mode
-f - Old Safe Mode
-F - Ignore Boot File
-s - Single User Mode
Graphics Mode - VESA Graphics Mode Dimensions
Text Mode - VGA Text Mode Dimensions
Boot Graphics - Graphics or Text Mode
Quiet Boot - Quiet Bootmode
MKext Cache - Mkext cache file
Kernel Cache - Kernel Cache file
rd - Root Device
boot-uuid - Boot UUID
platform - Platform Expert {ACPI}
config - Load alternate config plist
- Other
smbios - Verbose SMBIOS (AppleSMBIOS.kext) {1}
acpi - Debug AppleACPIPlatform {1-8}
acpi_level - ACPI Debug Level
acpi_layer - ACPI Debug Layer
acpi_sleep - ACPI Sleep
nvdebug - NVDAResman debug
nvrm - NVDAResman
ndrv_debug_level - NDRV Debug Level (NVDAResman)
pstep - Power Step Debug (ACPI_SMC)
hpet - AppleHPET
There are more, which I will update it later. I will not add args which are not present in the current apple release (i.e. only vanilla). All reservations against errors and mistakes. If you find anyone please notify.
Ex)
❶ "config=gfx"
- it load a config file with different gfx string, so it loads /Library/Preferences/SystemConfiguration/gfx.plist instead of com.apple.Boot.plist
❷ rd=disk0s3 -s -x "Graphics Mode"="800x600x32" platform=X86PC
- it can combine the flags:
❸ "rd=boot-uuid, boot-uuid = XXXXX" or "boot-uuid - XXXXX"
- Define Hard Disk
❹ "busratio=20"
- yea, it used i7 cpu in 10.5.6. after upgrading to 10.5.7, it does not need.
❺ "acpi_level=2 acpi_layer=0x80"
- Not sure, it will work.
