[Openpxa-users] Linux udelay() is way off
Bjørn Forsman
bjorn.forsman at gmail.com
Thu Jan 20 14:18:10 EST 2011
On 20 January 2011 18:55, Russell King - ARM Linux
<linux at arm.linux.org.uk> wrote:
> On Thu, Jan 20, 2011 at 06:00:04PM +0100, Marek Vasut wrote:
>> On Thursday 20 January 2011 17:09:00 Bjørn Forsman wrote:
>> > Hi,
>> >
>> > On my Colibri PXA310, I see that Linux udelay() is only 30 % of the
>> > length it's supposed to. This is way off and cause problems (e.g.
>> > 1-Wire device driver breaks). I'm running OpenPXA bootloaders (OBM2 +
>> > U-Boot) and mainline Linux 2.6.36.
>> >
>> > Any ideas how to fix this?
>> >
>> > Could it be that U-Boot sets up the system clock to something
>> > different than what Linux "expects" so that loops_per_jiffy becomes
>> > wrong? I see some clock setup in <u-boot-pxa>/arch/arm/cpu/pxa/start.S
>> > but I'm not sure what to do with it (yet). I'd like to try out
>> > different clock speeds to see if it helps. Any pointers?
>> >
>> > I also have a workaround in mind: Try out different lpj= settings on
>> > the kernel command line until a udelay(1000) actually is 1000 us. Is
>> > this a sane thing to do?
>>
>> CCing relevant people.
>>
>> And no, linux kernel should derive it's timing properly so it's a kernel bug.
>
> I recently looked into the udelay() timing accuracy, and I saw it only
> being reduced by .7% at boot time - due to the cycles stolen by the timer
> IRQ handler.
>
> The delay calibration algorithm shouldn't produce big errors due to the
> way it works. It first tries to find a delay longer than the timer tick.
> It then uses a successive approximation technique over about 9 bits of
> loops_per_jiffy value.
>
> So, I wouldn't expect the boot time lpj value to be significantly out.
>
> However, what might be happening is you boot at X MHz. You then use cpufreq
> and drop the frequency to Y MHz. You then suspend and resume. On resume,
> the boot loader starts the processor again at X MHz, but the kernel still
> assumes that you're running at Y MHz and has not adjusted the delay loop
> accordingly.
>
> This will result in a much shorter than expected delay.
>
> So, the first thing that needs doing is to ascertain when the delay
> becomes wrong.
I'm not doing any suspend/resume stuff.
But I did have cpufreq enabled (using default 'performance' governor).
Disabling cpufreq makes udelay() correct. Yay!
In order to try diagnosing the problem I re-enabled cpufreq and booted
with cpufreq.debug=7.
Here is dmesg | grep -E freq\|performance:
[ 0.000000] Kernel command line: console=ttyS0,115200 root=/dev/nfs
nfsroot=10.1.11.41:/srv/nfs ip=dhcp video=pxafb:vmem:4M consoleblank=0
cpufreq.debug=7
[ 11.422325] cpufreq-core: trying to register driver pxa3xx-cpufreq
[ 11.422491] cpufreq-core: adding CPU 0
[ 11.422636] freq-table: table entry 0: 104000 kHz, 0 index
[ 11.422758] freq-table: table entry 1: 208000 kHz, 1 index
[ 11.422876] freq-table: table entry 2: 416000 kHz, 2 index
[ 11.422995] freq-table: table entry 3: 624000 kHz, 3 index
[ 11.423630] cpufreq-core: setting new policy for CPU 0: 104000 - 624000 kHz
[ 11.423777] freq-table: request for verification of policy (104000
- 624000 kHz) for cpu 0
[ 11.423932] freq-table: verification lead to (104000 - 624000 kHz) for cpu 0
[ 11.424074] freq-table: request for verification of policy (104000
- 624000 kHz) for cpu 0
[ 11.424223] freq-table: verification lead to (104000 - 624000 kHz) for cpu 0
[ 11.424356] cpufreq-core: new min and max freqs are 104000 - 624000 kHz
[ 11.424464] cpufreq-core: governor switch
[ 11.424567] cpufreq-core: __cpufreq_governor for CPU 0, event 1
[ 11.424689] performance: setting to 624000 kHz because of event 1
[ 11.424817] cpufreq-core: target for CPU 0: 624000 kHz, relation 1
[ 11.424952] freq-table: request for target 624000 kHz (relation: 1) for cpu 0
[ 11.425091] freq-table: target is 3 (624000 kHz, 3)
[ 11.425207] cpufreq-core: notification 0 of frequency transition to
624000 kHz
[ 11.425363] cpufreq-core: saving 518144 as reference value for
loops_per_jiffy; freq is 312000 kHz
[ 11.425523] cpufreq-core: scaling loops_per_jiffy to 1036288 for
frequency 624000 kHz
[ 11.425659] cpufreq-core: notification 1 of frequency transition to
624000 kHz
[ 11.425681] cpufreq-core: FREQ: 624000 - CPU: 0
[ 11.425698] cpufreq-core: governor: change or update limits
[ 11.425717] cpufreq-core: __cpufreq_governor for CPU 0, event 3
[ 11.425738] performance: setting to 624000 kHz because of event 3
[ 11.425760] cpufreq-core: target for CPU 0: 624000 kHz, relation 1
[ 11.425781] freq-table: request for target 624000 kHz (relation: 1) for cpu 0
[ 11.425804] freq-table: target is 3 (624000 kHz, 3)
[ 11.426249] cpufreq-core: initialization complete
[ 11.426285] cpufreq-core: driver pxa3xx-cpufreq up and running
[ 13.177169] cpufreq-core: updating policy for CPU 0
[ 13.177214] cpufreq-core: setting new policy for CPU 0: 104000 - 624000 kHz
[ 13.177242] freq-table: request for verification of policy (104000
- 624000 kHz) for cpu 0
[ 13.177271] freq-table: verification lead to (104000 - 624000 kHz) for cpu 0
[ 13.177302] freq-table: request for verification of policy (104000
- 624000 kHz) for cpu 0
[ 13.177328] freq-table: verification lead to (104000 - 624000 kHz) for cpu 0
[ 13.177353] cpufreq-core: new min and max freqs are 104000 - 624000 kHz
[ 13.177373] cpufreq-core: governor: change or update limits
[ 13.177395] cpufreq-core: __cpufreq_governor for CPU 0, event 3
[ 13.177417] performance: setting to 624000 kHz because of event 3
[ 13.177440] cpufreq-core: target for CPU 0: 624000 kHz, relation 1
[ 13.177465] freq-table: request for target 624000 kHz (relation: 1) for cpu 0
[ 13.177491] freq-table: target is 3 (624000 kHz, 3)
See attached dmesg.txt for full output.
The kernel ends up with
Calibrating delay loop... 103.62 BogoMIPS (lpj=518144)
in both cases (with/without cpufreq).
Best regards,
Bjørn Forsman
-------------- next part --------------
[ 0.000000] Linux version 2.6.36-00038-g92080b9 (bjornfor at bjornfor-desktop) (gcc version 4.3.5 (Buildroot 2010.11-git) ) #3 PREEMPT Thu Jan 20 19:41:51 CET 2011
[ 0.000000] CPU: XScale-V3 based processor [69056892] revision 2 (ARMv5TE), cr=0000397f
[ 0.000000] CPU: VIVT data cache, VIVT instruction cache
[ 0.000000] Machine: Toradex Colibri PXA300
[ 0.000000] Memory policy: ECC disabled, Data cache writeback
[ 0.000000] RO Mode clock: 60.00MHz (inactive)
[ 0.000000] Run Mode clock: 312.00MHz (*24)
[ 0.000000] Turbo Mode clock: 624.00MHz (*2, inactive)
[ 0.000000] HSIO bus clock: 312.00MHz
[ 0.000000] On node 0 totalpages: 32768
[ 0.000000] free_area_init_node: node 0, pgdat c03f1484, node_mem_map c0448000
[ 0.000000] Normal zone: 256 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 32512 pages, LIFO batch:7
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32512
[ 0.000000] Kernel command line: console=ttyS0,115200 root=/dev/nfs nfsroot=10.1.11.41:/srv/nfs ip=dhcp video=pxafb:vmem:4M consoleblank=0 cpufreq.debug=7
[ 0.000000] PID hash table entries: 512 (order: -1, 2048 bytes)
[ 0.000000] Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
[ 0.000000] Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.000000] Memory: 128MB = 128MB total
[ 0.000000] Memory: 125568k/125568k available, 5504k reserved, 0K highmem
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
[ 0.000000] DMA : 0xffc00000 - 0xffe00000 ( 2 MB)
[ 0.000000] vmalloc : 0xc8800000 - 0xe8000000 ( 504 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xc8000000 ( 128 MB)
[ 0.000000] modules : 0xbf000000 - 0xc0000000 ( 16 MB)
[ 0.000000] .init : 0xc0008000 - 0xc0029000 ( 132 kB)
[ 0.000000] .text : 0xc0029000 - 0xc03ce000 (3732 kB)
[ 0.000000] .data : 0xc03ce000 - 0xc03f1ba0 ( 143 kB)
[ 0.000000] SLUB: Genslabs=11, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] Preemptable hierarchical RCU implementation.
[ 0.000000] RCU-based detection of stalled CPUs is disabled.
[ 0.000000] Verbose stalled-CPUs detection is disabled.
[ 0.000000] NR_IRQS:288
[ 0.000000] Console: colour dummy device 80x30
[ 10.834173] Calibrating delay loop... 103.62 BogoMIPS (lpj=518144)
[ 11.014293] pid_max: default: 32768 minimum: 301
[ 11.014769] Mount-cache hash table entries: 512
[ 11.016528] CPU: Testing write buffer coherency: ok
[ 11.020107] devtmpfs: initialized
[ 11.042976] NET: Registered protocol family 16
[ 11.090264] colibri_pxa3xx_init_eth(): no valid serial boot tag found, taking MAC from device
[ 11.092588] colibri_pxa3xx_init_eth(): no valid serial boot tag found, taking MAC from device
[ 11.218487] bio: create slab <bio-0> at 0
[ 11.229147] SCSI subsystem initialized
[ 11.232169] usbcore: registered new interface driver usbfs
[ 11.234980] usbcore: registered new interface driver hub
[ 11.236852] usbcore: registered new device driver usb
[ 11.244693] I2C: i2c-0: PXA I2C adapter
[ 11.256367] Switching to clocksource oscr0
[ 11.411734] NET: Registered protocol family 2
[ 11.412437] IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 11.413961] TCP established hash table entries: 4096 (order: 3, 32768 bytes)
[ 11.414750] TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
[ 11.415257] TCP: Hash tables configured (established 4096 bind 4096)
[ 11.415360] TCP reno registered
[ 11.415462] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 11.415663] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 11.416416] NET: Registered protocol family 1
[ 11.419072] RPC: Registered udp transport module.
[ 11.419190] RPC: Registered tcp transport module.
[ 11.419277] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 11.422325] cpufreq-core: trying to register driver pxa3xx-cpufreq
[ 11.422491] cpufreq-core: adding CPU 0
[ 11.422636] freq-table: table entry 0: 104000 kHz, 0 index
[ 11.422758] freq-table: table entry 1: 208000 kHz, 1 index
[ 11.422876] freq-table: table entry 2: 416000 kHz, 2 index
[ 11.422995] freq-table: table entry 3: 624000 kHz, 3 index
[ 11.423083] CPUFREQ support for PXA3xx initialized
[ 11.423630] cpufreq-core: setting new policy for CPU 0: 104000 - 624000 kHz
[ 11.423777] freq-table: request for verification of policy (104000 - 624000 kHz) for cpu 0
[ 11.423932] freq-table: verification lead to (104000 - 624000 kHz) for cpu 0
[ 11.424074] freq-table: request for verification of policy (104000 - 624000 kHz) for cpu 0
[ 11.424223] freq-table: verification lead to (104000 - 624000 kHz) for cpu 0
[ 11.424356] cpufreq-core: new min and max freqs are 104000 - 624000 kHz
[ 11.424464] cpufreq-core: governor switch
[ 11.424567] cpufreq-core: __cpufreq_governor for CPU 0, event 1
[ 11.424689] performance: setting to 624000 kHz because of event 1
[ 11.424817] cpufreq-core: target for CPU 0: 624000 kHz, relation 1
[ 11.424952] freq-table: request for target 624000 kHz (relation: 1) for cpu 0
[ 11.425091] freq-table: target is 3 (624000 kHz, 3)
[ 11.425207] cpufreq-core: notification 0 of frequency transition to 624000 kHz
[ 11.425363] cpufreq-core: saving 518144 as reference value for loops_per_jiffy; freq is 312000 kHz
[ 11.425523] cpufreq-core: scaling loops_per_jiffy to 1036288 for frequency 624000 kHz
[ 11.425659] cpufreq-core: notification 1 of frequency transition to 624000 kHz
[ 11.425681] cpufreq-core: FREQ: 624000 - CPU: 0
[ 11.425698] cpufreq-core: governor: change or update limits
[ 11.425717] cpufreq-core: __cpufreq_governor for CPU 0, event 3
[ 11.425738] performance: setting to 624000 kHz because of event 3
[ 11.425760] cpufreq-core: target for CPU 0: 624000 kHz, relation 1
[ 11.425781] freq-table: request for target 624000 kHz (relation: 1) for cpu 0
[ 11.425804] freq-table: target is 3 (624000 kHz, 3)
[ 11.426249] cpufreq-core: initialization complete
[ 11.426285] cpufreq-core: driver pxa3xx-cpufreq up and running
[ 11.426306] NetWinder Floating Point Emulator V0.97 (double precision)
[ 11.430543] JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
[ 11.431042] msgmni has been set to 245
[ 11.432666] io scheduler noop registered
[ 11.432697] io scheduler deadline registered
[ 11.432739] io scheduler cfq registered (default)
[ 11.470434] Console: switching to colour frame buffer device 100x37
[ 12.276781] pxa2xx-uart.0: ttyS0 at MMIO 0x40100000 (irq = 22) is a FFUART
[ 12.657045] console [ttyS0] enabled
[ 12.662430] pxa2xx-uart.1: ttyS1 at MMIO 0x40200000 (irq = 21) is a BTUART
[ 12.671456] pxa2xx-uart.2: ttyS2 at MMIO 0x40700000 (irq = 20) is a STUART
[ 12.716603] NAND device: Manufacturer ID: 0xec, Chip ID: 0xdc (Samsung NAND 512MiB 3,3V 8-bit)
[ 12.725823] Bad block table found at page 262080, version 0x01
[ 12.726664] Bad block table found at page 262016, version 0x01
[ 12.727100] nand_read_bbt: Bad block at 0x000001480000
[ 12.727119] nand_read_bbt: Bad block at 0x0000014a0000
[ 12.727134] nand_read_bbt: Bad block at 0x0000014c0000
[ 12.727149] nand_read_bbt: Bad block at 0x0000014e0000
[ 12.727165] nand_read_bbt: Bad block at 0x000001500000
[ 12.727180] nand_read_bbt: Bad block at 0x000001520000
[ 12.727196] nand_read_bbt: Bad block at 0x000001540000
[ 12.727211] nand_read_bbt: Bad block at 0x000001560000
[ 12.727227] nand_read_bbt: Bad block at 0x000001580000
[ 12.727243] nand_read_bbt: Bad block at 0x0000015a0000
[ 12.727258] nand_read_bbt: Bad block at 0x0000015c0000
[ 12.727274] nand_read_bbt: Bad block at 0x0000015e0000
[ 12.727289] nand_read_bbt: Bad block at 0x000001600000
[ 12.727305] nand_read_bbt: Bad block at 0x000001620000
[ 12.727320] nand_read_bbt: Bad block at 0x000001640000
[ 12.727336] nand_read_bbt: Bad block at 0x000001660000
[ 12.727472] nand_read_bbt: Bad block at 0x00001e720000
[ 12.727617] Creating 6 MTD partitions on "NAND 512MiB 3,3V 8-bit":
[ 12.733793] 0x000000000000-0x000000100000 : "bootloader (read-only)"
[ 12.744713] 0x000000100000-0x000001100000 : "kernel (read-only)"
[ 12.755315] 0x000001100000-0x000002100000 : "kernel"
[ 12.764900] 0x000002100000-0x000010700000 : "rootfs"
[ 12.774960] 0x000010700000-0x00001ed00000 : "spare"
[ 12.784986] 0x00001ed00000-0x000020000000 : "Bad Block Table"
[ 12.798200] ax88796 ax88796.0: 16bit, irq 122, c887c000, MAC: 00:11:22:33:44:24
[ 12.807141] ax88796 ax88796.1: 16bit, irq 210, c88b6000, MAC: 00:00:00:00:00:24
[ 12.819055] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 12.825221] ohci_hcd: block sizes: ed 64 td 64
[ 12.825381] In ohci_hcd_pxa27x_drv_probe
[ 12.825581] pxa27x-ohci pxa27x-ohci: PXA27x OHCI
[ 12.830620] drivers/usb/core/inode.c: creating file 'devices'
[ 12.830669] drivers/usb/core/inode.c: creating file '001'
[ 12.831981] pxa27x-ohci pxa27x-ohci: new USB bus registered, assigned bus number 1
[ 12.839865] pxa27x-ohci pxa27x-ohci: irq 3, io mem 0x4c000000
[ 12.845590] pxa27x-ohci pxa27x-ohci: ohci_pxa27x_start, ohci:c7a054dc
[ 12.845720] pxa27x-ohci pxa27x-ohci: created debug files
[ 12.899228] pxa27x-ohci pxa27x-ohci: OHCI controller state
[ 12.899264] pxa27x-ohci pxa27x-ohci: OHCI 1.0, NO legacy support registers
[ 12.899294] pxa27x-ohci pxa27x-ohci: control 0x083 HCFS=operational CBSR=3
[ 12.899319] pxa27x-ohci pxa27x-ohci: cmdstatus 0x00000 SOC=0
[ 12.899345] pxa27x-ohci pxa27x-ohci: intrstatus 0x00000004 SF
[ 12.899370] pxa27x-ohci pxa27x-ohci: intrenable 0x8000005a MIE RHSC UE RD WDH
[ 12.899393] pxa27x-ohci pxa27x-ohci: hcca frame #0003
[ 12.899420] pxa27x-ohci pxa27x-ohci: roothub.a 04000202 POTPGT=4 NPS NDP=2(3)
[ 12.899444] pxa27x-ohci pxa27x-ohci: roothub.b 00000000 PPCM=0000 DR=0000
[ 12.899469] pxa27x-ohci pxa27x-ohci: roothub.status 00008000 DRWE
[ 12.899500] pxa27x-ohci pxa27x-ohci: roothub.portstatus [0] 0x00000100 PPS
[ 12.899527] pxa27x-ohci pxa27x-ohci: roothub.portstatus [1] 0x00000100 PPS
[ 12.899555] pxa27x-ohci pxa27x-ohci: roothub.portstatus [2] 0x00000100 PPS
[ 12.899686] usb usb1: default language 0x0409
[ 12.899740] usb usb1: udev 1, busnum 1, minor = 0
[ 12.899762] usb usb1: New USB device found, idVendor=1d6b, idProduct=0001
[ 12.906576] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 12.913749] usb usb1: Product: PXA27x OHCI
[ 12.917853] usb usb1: Manufacturer: Linux 2.6.36-00038-g92080b9 ohci_hcd
[ 12.924509] usb usb1: SerialNumber: pxa27x
[ 12.930219] usb usb1: usb_probe_device
[ 12.930262] usb usb1: configuration #1 chosen from 1 choice
[ 12.930355] usb usb1: adding 1-0:1.0 (config #1, interface 0)
[ 12.931071] hub 1-0:1.0: usb_probe_interface
[ 12.931109] hub 1-0:1.0: usb_probe_interface - got id
[ 12.931130] hub 1-0:1.0: USB hub found
[ 12.934910] hub 1-0:1.0: 3 ports detected
[ 12.939107] hub 1-0:1.0: standalone hub
[ 12.939130] hub 1-0:1.0: no power switching (usb 1.0)
[ 12.939148] hub 1-0:1.0: global over-current protection
[ 12.939168] hub 1-0:1.0: power on to power good time: 8ms
[ 12.939225] hub 1-0:1.0: local power source is good
[ 12.939245] hub 1-0:1.0: no over-current condition exists
[ 12.939268] hub 1-0:1.0: trying to enable port power on non-switchable hub
[ 12.940082] drivers/usb/core/inode.c: creating file '001'
[ 12.941378] usbcore: registered new interface driver usblp
[ 12.947093] Initializing USB Mass Storage driver...
[ 12.952559] usbcore: registered new interface driver usb-storage
[ 12.958787] USB Mass Storage support registered.
[ 12.963387] pxa27x_udc: version 2008-04-18
[ 12.968624] g_ether gadget: using random self ethernet address
[ 12.974462] g_ether gadget: using random host ethernet address
[ 12.981582] usb0: MAC 0e:86:76:80:dd:3e
[ 12.985414] usb0: HOST MAC a2:8d:9a:ce:d5:15
[ 12.989942] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
[ 12.996648] g_ether gadget: g_ether ready
[ 13.036694] hub 1-0:1.0: state 7 ports 3 chg 0000 evt 0000
[ 13.109010] mice: PS/2 mouse device common for all mice
[ 13.115691] input: gpio-keys as /devices/platform/gpio-keys/input/input0
[ 13.126971] pxa-rtc pxa-rtc: rtc core: registered pxa-rtc as rtc0
[ 13.133585] i2c /dev entries driver
[ 13.139495] Driver for 1-wire Dallas network protocol.
[ 13.177169] cpufreq-core: updating policy for CPU 0
[ 13.177214] cpufreq-core: setting new policy for CPU 0: 104000 - 624000 kHz
[ 13.177242] freq-table: request for verification of policy (104000 - 624000 kHz) for cpu 0
[ 13.177271] freq-table: verification lead to (104000 - 624000 kHz) for cpu 0
[ 13.177302] freq-table: request for verification of policy (104000 - 624000 kHz) for cpu 0
[ 13.177328] freq-table: verification lead to (104000 - 624000 kHz) for cpu 0
[ 13.177353] cpufreq-core: new min and max freqs are 104000 - 624000 kHz
[ 13.177373] cpufreq-core: governor: change or update limits
[ 13.177395] cpufreq-core: __cpufreq_governor for CPU 0, event 3
[ 13.177417] performance: setting to 624000 kHz because of event 3
[ 13.177440] cpufreq-core: target for CPU 0: 624000 kHz, relation 1
[ 13.177465] freq-table: request for target 624000 kHz (relation: 1) for cpu 0
[ 13.177491] freq-table: target is 3 (624000 kHz, 3)
[ 13.181540] Registered led device: a
[ 13.184429] usbcore: registered new interface driver usbhid
[ 13.190197] usbhid: USB HID core driver
[ 13.194452] TCP cubic registered
[ 13.197939] XScale iWMMXt coprocessor detected.
[ 13.208609] pxa-rtc pxa-rtc: setting system clock to 2000-01-01 00:00:14 UTC (946684814)
[ 13.344919] mmc0: host does not support reading read-only switch. assuming write-enable.
[ 13.353163] mmc0: new SD card at address 8c4f
[ 13.358624] mmcblk0: mmc0:8c4f S016B 14.2 MiB
[ 13.365410] mmcblk0: p1
[ 14.736538] Sending DHCP requests .., OK
[ 18.676544] IP-Config: Got DHCP answer from 0.0.0.0, my address is 10.1.11.70
[ 18.717261] IP-Config: Complete:
[ 18.720322] device=eth0, addr=10.1.11.70, mask=255.255.128.0, gw=10.1.10.20,
[ 18.727786] host=10.1.11.70, domain=creo.dev, nis-domain=(none),
[ 18.734182] bootserver=0.0.0.0, rootserver=10.1.11.41, rootpath=
[ 18.741328] Looking up port of RPC 100003/2 on 10.1.11.41
[ 18.757623] Looking up port of RPC 100005/1 on 10.1.11.41
[ 18.779602] VFS: Mounted root (nfs filesystem) on device 0:15.
[ 18.786304] devtmpfs: mounted
[ 18.789527] Freeing init memory: 132K
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