Cannot boot with rootfs from eMMC if maxcpus=1
From: Richard Schmitt
Date: Thu Nov 09 2017 - 11:15:08 EST
Using a 4.9 kernel, trying to boot a kernel using an eMMC based rootfs will result in a crash
The message preceeding the crash is:
[ 3.285566] VFS: Cannot open root device "mmcblk0p9" or unknown-block(0,0): error -6
[ 3.293338] Please append a correct "root=" boot option; here are the available partitions:
Our kernel boot args can be seen in the boot log but for easy reference are:
root=/dev/mmcblk0p9 earlycon clk_ignore_unused cpuidle.off=1 DEBUG_MODE=y siq_board_type=RP maxcpus=1
Note that we do specify root=/dev/mmcblk0p9. If I simply remove maxcpus=1 from the kernel boot args, the system will boot up fine.
Seems like there might be a race in bringing up the eMMC partitions prior to mounting the rootfs but I donât want to hypothesis any further.
Any ideas?
Output of boot follows:
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 4.9.0-xilinx-v2017.1 (rschmitt@linux-bf3) (gcc version 6.2.0 (GCC) ) #1 SMP Wed Oct 11 09:45:17 EDT 2017
[ 0.000000] Boot CPU: AArch64 Processor [410fd034]
[ 0.000000] earlycon: cdns0 at MMIO 0x00000000ff000000 (options '115200n8')
[ 0.000000] bootconsole [cdns0] enabled
[ 0.000000] efi: Getting EFI parameters from FDT:
[ 0.000000] efi: UEFI not found.
[ 0.000000] cma: Reserved 128 MiB at 0x0000000036c00000
[ 0.000000] psci: probing for conduit method from DT.
[ 0.000000] psci: PSCIv1.0 detected in firmware.
[ 0.000000] psci: Using standard PSCI v0.2 function IDs
[ 0.000000] psci: MIGRATE_INFO_TYPE not supported.
[ 0.000000] percpu: Embedded 21 pages/cpu @ffffffc03ff70000 s47640 r8192 d30184 u86016
[ 0.000000] Detected VIPT I-cache on CPU0
[ 0.000000] CPU features: enabling workaround for ARM erratum 845719
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 253952
[ 0.000000] Kernel command line: root=/dev/mmcblk0p9 earlycon clk_ignore_unused cpuidle.off=1 DEBUG_MODE=y siq_board_type=RP maxcpus=1
[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
[ 0.000000] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
[ 0.000000] Memory: 868920K/1032192K available (9212K kernel code, 614K rwdata, 2864K rodata, 512K init, 398K bss, 32200K reserved, 131072K cma-reserved)
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] modules : 0xffffff8000000000 - 0xffffff8008000000 ( 128 MB)
[ 0.000000] vmalloc : 0xffffff8008000000 - 0xffffffbebfff0000 ( 250 GB)
[ 0.000000] .text : 0xffffff8008080000 - 0xffffff8008980000 ( 9216 KB)
[ 0.000000] .rodata : 0xffffff8008980000 - 0xffffff8008c50000 ( 2880 KB)
[ 0.000000] .init : 0xffffff8008c50000 - 0xffffff8008cd0000 ( 512 KB)
[ 0.000000] .data : 0xffffff8008cd0000 - 0xffffff8008d69a00 ( 615 KB)
[ 0.000000] .bss : 0xffffff8008d69a00 - 0xffffff8008dcd5c4 ( 399 KB)
[ 0.000000] fixed : 0xffffffbefe7fd000 - 0xffffffbefec00000 ( 4108 KB)
[ 0.000000] PCI I/O : 0xffffffbefee00000 - 0xffffffbeffe00000 ( 16 MB)
[ 0.000000] vmemmap : 0xffffffbf00000000 - 0xffffffc000000000 ( 4 GB maximum)
[ 0.000000] 0xffffffbf00000000 - 0xffffffbf01000000 ( 16 MB actual)
[ 0.000000] memory : 0xffffffc000000000 - 0xffffffc040000000 ( 1024 MB)
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] Build-time adjustment of leaf fanout to 64.
[ 0.000000] RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=4.
[ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=64, nr_cpu_ids=4
[ 0.000000] NR_IRQS:64 nr_irqs:64 0
[ 0.000000] GIC: Adjusting CPU interface base to 0x00000000f902f000
[ 0.000000] GIC: Using split EOI/Deactivate mode
[ 0.000000] arm_arch_timer: Architected cp15 timer(s) running at 33.00MHz (phys).
[ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x79c5e18f3, max_idle_ns: 440795202740 ns
[ 0.000003] sched_clock: 56 bits at 33MHz, resolution 30ns, wraps every 2199023255542ns
[ 0.008325] Console: colour dummy device 80x25
[ 0.012626] console [tty0] enabled
[ 0.016024] bootconsole [cdns0] disa[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 4.9.0-xilinx-v2017.1 (rschmitt@linux-bf3) (gcc version 6.2.0 (GCC) ) #1 SMP Wed Oct 11 09:45:17 EDT 2017
[ 0.000000] Boot CPU: AArch64 Processor [410fd034]
[ 0.000000] earlycon: cdns0 at MMIO 0x00000000ff000000 (options '115200n8')
[ 0.000000] bootconsole [cdns0] enabled
[ 0.000000] efi: Getting EFI parameters from FDT:
[ 0.000000] efi: UEFI not found.
[ 0.000000] cma: Reserved 128 MiB at 0x0000000036c00000
[ 0.000000] psci: probing for conduit method from DT.
[ 0.000000] psci: PSCIv1.0 detected in firmware.
[ 0.000000] psci: Using standard PSCI v0.2 function IDs
[ 0.000000] psci: MIGRATE_INFO_TYPE not supported.
[ 0.000000] percpu: Embedded 21 pages/cpu @ffffffc03ff70000 s47640 r8192 d30184 u86016
[ 0.000000] Detected VIPT I-cache on CPU0
[ 0.000000] CPU features: enabling workaround for ARM erratum 845719
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 253952
[ 0.000000] Kernel command line: root=/dev/mmcblk0p9 earlycon clk_ignore_unused cpuidle.off=1 DEBUG_MODE=y siq_board_type=RP maxcpus=1
[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
[ 0.000000] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
[ 0.000000] Memory: 868920K/1032192K available (9212K kernel code, 614K rwdata, 2864K rodata, 512K init, 398K bss, 32200K reserved, 131072K cma-reserved)
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] modules : 0xffffff8000000000 - 0xffffff8008000000 ( 128 MB)
[ 0.000000] vmalloc : 0xffffff8008000000 - 0xffffffbebfff0000 ( 250 GB)
[ 0.000000] .text : 0xffffff8008080000 - 0xffffff8008980000 ( 9216 KB)
[ 0.000000] .rodata : 0xffffff8008980000 - 0xffffff8008c50000 ( 2880 KB)
[ 0.000000] .init : 0xffffff8008c50000 - 0xffffff8008cd0000 ( 512 KB)
[ 0.000000] .data : 0xffffff8008cd0000 - 0xffffff8008d69a00 ( 615 KB)
[ 0.000000] .bss : 0xffffff8008d69a00 - 0xffffff8008dcd5c4 ( 399 KB)
[ 0.000000] fixed : 0xffffffbefe7fd000 - 0xffffffbefec00000 ( 4108 KB)
[ 0.0g at 33.00MHz (phys).
[ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x79c5e18f3, max_idle_ns: 440795202740 ns
[ 0.000003] sched_clock: 56 bits at 33MHz, resolution 30ns, wraps every 2199023255542ns
[ 0.008325] Console: colour dummy device 80x25
[ 0.012626] console [tty0] enabled
[ 0.016024] bootconsole [cdns0] disabled
[ 0.019973] Calibrating delay loop (skipped), value calculated using timer frequency.. 66.00 BogoMIPS (lpj=132000)
[ 0.019987] pid_max: default: 32768 minimum: 301
[ 0.020113] Mount-cache hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.020123] Mountpoint-cache hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.020722] ASID allocator initialised with 65536 entries
[ 0.021248] zynqmp_plat_init Power management API v0.3
[ 0.021327] EFI services will not be available.
[ 0.021423] Brought up 1 CPUs
[ 0.021430] SMP: Total of 1 processors activated.
[ 0.021439] CPU features: detected feature: 32-bit EL0 Support
[ 0.021450] CPU: All CPU(s) started at EL2
[ 0.021463] alternatives: patching kernel code
[ 0.021964] devtmpfs: initialized
[ 0.026909] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[ 0.029797] xor: measuring software checksum speed
[ 0.068095] 8regs : 2279.000 MB/sec
[ 0.108150] 8regs_prefetch: 2032.000 MB/sec
[ 0.148206] 32regs : 2699.000 MB/sec
[ 0.188262] 32regs_prefetch: 2354.000 MB/sec
[ 0.188269] xor: using function: 32regs (2699.000 MB/sec)
[ 0.188344] pinctrl core: initialized pinctrl subsystem
[ 0.189328] NET: Registered protocol family 16
[ 0.190075] Failed to initialise IOMMU /amba/smmu@fd800000
[ 0.190317] vdso: 2 pages (1 code @ ffffff8008987000, 1 data @ ffffff8008cd4000)
[ 0.190341] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.
[ 0.191078] DMA: preallocated 256 KiB pool for atomic allocations
[ 0.203054] reset_zynqmp reset-controller: Xilinx zynqmp reset driver probed
[ 0.203436] ARM CCI_400_r1 PMU driver probed
[ 0.206249] zynqmp-pinctrl ff180000.pinctrl: zynqmp pinctrl initialized
[ 0.207534] irq: no irq domain found for /amba/gpio@ff0a0000 !
[ 0.231997] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[ 0.300639] raid6: int64x1 gen() 405 MB/s
[ 0.368686] raid6: int64x1 xor() 438 MB/s
[ 0.436877] raid6: int64x2 gen() 667 MB/s
[ 0.504929] raid6: int64x2 xor() 592 MB/s
[ 0.573013] raid6: int64x4 gen() 977 MB/s
[ 0.641137] raid6: int64x4 xor() 751 MB/s
[ 0.709254] raid6: int64x8 gen() 1090 MB/s
[ 0.777366] raid6: int64x8 xor() 723 MB/s
[ 0.845503] raid6: neonx1 gen() 720 MB/s
[ 0.913548] raid6: neonx1 xor() 754 MB/s
[ 0.981653] raid6: neonx2 gen() 1160 MB/s
[ 1.049769] raid6: neonx2 xor() 1028 MB/s
[ 1.117879] raid6: neonx4 gen() 1497 MB/s
[ 1.185998] raid6: neonx4 xor() 1173 MB/s
[ 1.254094] raid6: neonx8 gen() 1573 MB/s
[ 1.322208] raid6: neonx8 xo09] Advanced Linux Sound Architecture Driver Initialized.
[ 1.325706] Bluetooth: Core ver 2.22
[ 1.325737] NET: Registered protocol family 31
[ 1.325749] Bluetooth: HCI device and connection manager initialized
[ 1.325766] Bluetooth: HCI socket layer initialized
[ 1.325779] Bluetooth: L2CAP socket layer initialized
[ 1.325802] Bluetooth: SCO socket layer initialized
[ 1.327660] clocksource: Switched to clocksource arch_sys_counter
[ 1.327760] VFS: Disk quotas dquot_6.6.0
[ 1.327809] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 1.335628] NET: Registered protocol family 2
[ 1.336003] TCP established hash table entries: 8192 (order: 4, 65536 bytes)
[ 1.336071] TCP bind hash table entries: 8192 (order: 5, 131072 bytes)
[ 1.336196] TCP: Hash tables configured (established 8192 bind 8192)
[ 1.336253] UDP hash table entries: 512 (order: 2, 16384 bytes)
[ 1.336285] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[ 1.336407] NET: Registered protocol family 1
[ 1.337072] RPC: Registered named UNIX socket transport module.
[ 1.337086] RPC: Registered udp transport module.
[ 1.337097] RPC: Registered tcp transport module.
[ 1.337109] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 1.337499] hw perfevents: enabled with armv8_pmuv3 PMU driver, 7 counters available
[ 1.338163] futex hash table entries: 1024 (order: 5, 131072 bytes)
[ 1.338244] audit: initializing netlink subsys (disabled)
[ 1.338275] audit: type=2000 audit(1.324:1): initialized
[ 1.339237] workingset: timestamp_bits=46 max_order=18 bucket_order=0
[ 1.340123] NFS: Registering the id_resolver key type
[ 1.340150] Key type id_resolver registered
[ 1.340161] Key type id_legacy registered
[ 1.340177] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[ 1.340204] jffs2: version 2.2. (NAND) (SUMMARY) Â 2001-2006 Red Hat, Inc.
[ 1.344898] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 247)
[ 1.344920] io scheduler noop registered
[ 1.344932] io scheduler deadline registered
[ 1.344952] io scheduler cfq registered (default)
[ 1.345970] Write failed gate address:1000f02
[ 1.346102] xilinx-zynqmp-dma fd500000.dma: ZynqMP DMA driver Probe success
[ 1.346256] xilinx-zynqmp-dma fd510000.dma: ZynqMP DMA driver Probe success
[ 1.346400] xilinx-zynqmp-dma fd520000.dma: ZynqMP DMA driver Probe success
[ 1.346547] xilinx-zynqmp-dma fd530000.dma: ZynqMP DMA driver Probe success
[ 1.346690] xilinx-zynqmp-dma fd540000.dma: ZynqMP DMA driver Probe success
[ 1.346838] xilinx-zynqmp-dma fd550000.dma: ZynqMP DMA driver Probe success
[ 1.346982] xilinx-zynqmp-dma fd560000.dma: ZynqMP DMA driver Probe success
[ 1.347127] xilinx-zynqmp-dma fd570000.dma: ZynqMP DMA driver Probe success
[ 1.347358] xilinx-zynqmp-dma ffa80000.dma: ZynqMP DMA driver Probe success
[ 1.347504] xilinx-zynqmp-dma ffa90000.dma: ZynqMP DMA driver Probe success
[ 1.347678] xilinx-zynqmp-dma ffaa0000.dma: ZynqMP DMA driver Probe success
[ 1.347822] xilinx-zynqmp-dma ffab0000.dma: ZynqMP DMA driver Probe success
[ 1.347966] xilinx-zynqmp-dma ffac0000.dma: ZynqMP DMA driver Probe success
[ 1.348110] xilinx-zynqmp-dma ffad0000.dma: ZynqMP DMA driver Probe success
[ 1.348249] xilinx-zynqmp-dma ffae0000.dma: ZynqMP DMA driver Probe success
[ 1.348393] xilinx-zynqmp-dma ffaf0000.dma: ZynqMP DMA driver Probe success
[ 1.348496] zynqmp_pm firmware: Power management API v0.3
[ 1.400849] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[ 1.402460] ff000000.serial: ttyPS0 at MMIO 0xff000000 (irq = 38, base_baud = 6249999) is a xuartps
[ 2.352972] console [ttyPS0] enabled
[ 2.356851] ff010000.serial: ttyPS1 at MMIO 0xff010000 (irq = 39, base_baud = 6249999) is a xuartps
[ 2.366167] [drm] Initialized
[ 2.369300] Unable to detect cache hierarchy from DT for CPU 0
[ 2.380932] brd: module loaded
[ 2.387905] loop: module loaded
[ 2.391357] timingdev_init
[ 2.394098] start address : 0x800a0000 and size : 0x10000
[ 2.400037] Successfully registered the 1588timing driver
[ 2.405516] Successfully registered the 1588timing proc file
[ 2.411525] mtdoops: mtd device (mtddev=name/number) must be supplied
[ 2.420079] libphy: Fixed MDIO Bus: probed
[ 2.425152] tun: Universal TUN/TAP device driver, 1.6
[ 2.430185] tun: (C) 1999-2004 Max Krasnyansky <maxk@xxxxxxxxxxxx>
[ 2.440295] CAN device driver interface
[ 2.444729] num_ques is 2
[ 2.447430] xilinx_axienet 800c0000.ethernet: TX_CSUM 0
[ 2.452660] xilinx_axienet 800c0000.ethernet: RX_CSUM 0
[ 2.457953] q->chan_id is 1
[ 2.460809] q->chan_id is 2
[ 2.460809]
[ 2.465299] xilinx_axienet 800c0000.ethernet: Check if the MDIO being used is provided by Commscope
[ 2.474459] axinet_is_phy_provider_commscope
[ 2.478750] xilinx_axienet 800c0000.ethernet: Setting up clause 45 MDIO and populating mdio bus infra
[ 2.488137] xilinx_axienet 800c0000.ethernet: Found ethernet controller device node.
[ 2.495949] xilinx_axienet 800c0000.ethernet: Found mdio_driver node. Proceeding to parse address
[ 2.505064] xilinx_axienet 800c0000.ethernet: C45 MDIO start address : 0x80030000 and size : 0x10000
[ 2.514356] xilinx_axienet 800c0000.ethernet: Virtual address of AXIlite ffffff8009110000
[ 2.514356] .
[ 2.524266] xilinx_axienet 800c0000.ethernet: Starting Self Test
[ 2.524266] .
[ 2.531974] xilinx_axienet 800c0000.ethernet: ======================
[ 2.538521] xilinx_axienet 800c0000.ethernet: [C45-ST] DEVICE 1 REG 8, VALUE 38657
[ 2.546163] xilinx_axienet 800c0000.ethernet: [C45-ST] DEVICE 1 REG b, VALUE 420
[ 2.553633] xilinx_axienet 800c0000.ethernet: [C45-ST] DEVICE 31 REG F001, VALUE 12
[ 2.561366] xilinx_axienet 800c0000.ethernet: [C45-ST] DEVICE 1 REG 0x6, VALUE 49152
[ 2.569187] xilinx_axienet 800c0000.ethernx_axienet 80040000.ethernet: RX_CSUM 0
[ 2.645308] q->chan_id is 1
[ 2.648183] q->chan_id is 2
[ 2.648183]
[ 2.652644] xilinx_axienet 80040000.ethernet: Check if the MDIO being used is provided by Commscope
[ 2.661798] axinet_is_phy_provider_commscope
[ 2.666136] libphy: Xilinx Axi Ethernet MDIO: probed
[ 2.672199] usbcore: registered new interface driver asix
[ 2.677632] usbcore: registered new interface driver ax88179_178a
[ 2.683745] usbcore: registered new interface driver cdc_ether
[ 2.689618] usbcore: registered new interface driver net1080
[ 2.695316] usbcore: registered new interface driver cdc_subset
[ 2.701277] usbcore: registered new interface driver zaurus
[ 2.706901] usbcore: registered new interface driver cdc_ncm
[ 2.712958] usbcore: registered new interface driver uas
[ 2.718280] usbcore: registered new interface driver usb-storage
[ 2.725402] mousedev: PS/2 mouse device common for all mice
[ 2.731590] rtc_zynqmp ffa60000.rtc: rtc core: registered ffa60000.rtc as rtc0
[ 2.738869] i2c /dev entries driver
[ 2.742575] cdns-i2c ff020000.i2c: 400 kHz mmio ff020000 irq 31
[ 2.749261] cdns-i2c ff030000.i2c: 400 kHz mmio ff030000 irq 32
[ 2.755897] i2c i2c-1: Failed to register i2c client tca6416 at 0x74 (-16)
[ 2.762772] i2c i2c-1: of_i2c: Failure registering /amba/i2c@ff030000/tca9539@74
[ 2.770228] i2c i2c-1: Failed to create I2C device for /amba/i2c@ff030000/tca9539@74
[ 2.778696] i2c i2c-1: Added multiplexed i2c bus 2
[ 2.783757] i2c i2c-1: Added multiplexed i2c bus 3
[ 2.788736] i2c i2c-1: Added multiplexed i2c bus 4
[ 2.794071] i2c i2c-1: Added multiplexed i2c bus 5
[ 2.798982] i2c i2c-1: Added multiplexed i2c bus 6
[ 2.803990] i2c i2c-1: Added multiplexed i2c bus 7
[ 2.808966] i2c i2c-1: Added multiplexed i2c bus 8
[ 2.813943] i2c i2c-1: Added multiplexed i2c bus 9
[ 2.818718] pca954x 1-0074: registered 8 multiplexed busses for I2C switch pca9548
[ 2.827851] lm75 0-0048: hwmon0: sensor 'lm75'
[ 2.832988] lm75 0-004c: hwmon1: sensor 'lm75'
[ 2.838150] Bluetooth: HCI UART driver ver 2.3
[ 2.842573] Bluetooth: HCI UART protocol H4 registered
[ 2.847736] Bluetooth: HCI UART protocol BCSP registered
[ 2.853083] Bluetooth: HCI UART protocol LL registered
[ 2.858255] Bluetooth: HCI UART protocol ATH3K registered
[ 2.863691] Bluetooth: HCI UART protocol Three-wire (H5) registered
[ 2.870041] Bluetooth: HCI UART protocol Intel registered
[ 2.875476] Bluetooth: HCI UART protocol Broadcom registered
[ 2.881141] Bluetooth: HCI UART protocol QCA registered
[ 2.886436] usbcore: registered new interface driver bcm203x
[ 2.892128] usbcore: registered new interface driver bpa10x
[ 2.897741] usbcore: registered new interface driver bfusb
[ 2.903265] usbcore: registered new interface driver btusb
[ 2.908759] Bluetooth: Generic Bluetooth SDIO driver ver 0.1
[ 2.914503] usbcore: registered new interface driver ath3k
[ 2.920113] EDAC MC: ECC not enabled
[ 2.923780] EDAC DEVICE0: Giving out device to module edac controller cache_err: DEV edac (INTERRUPT)
[ 2.933172] EDAC DEVICE1: Giving out device to module zynqmp-ocm-edac controller zynqmp_ocm: DEV ff960000.memory-controller (INTERRUPT)
[ 2.945918] CPUidle arm: Failed to register cpuidle driver
[ 2.951519] sdhci: Secure Digital Host Controller Interface driver
[ 2.957691] sdhci: Copyright(c) Pierre Ossman
[ 2.962073] sdhci-pltfm: SDHCI platform and OF driver helper
[ 3.015653] mmc0: SDHCI controller on ff160000.sdhci [ff160000.sdhci] using ADMA 64-bit
[ 3.023970] ledtrig-cpu: registered to indicate activity on CPUs
[ 3.030093] usbcore: registered new interface driver usbhid
[ 3.035645] usbhid: USB HID core driver
[ 3.045336] fpga_manager fpga0: Xilinx ZynqMP FPGA Manager registered
[ 3.059651] pktgen: Packet Generator for packet performance testing. Version: 2.75
[ 3.06zed
[ 3.221873] 9pnet: Installing 9P2000 support
[ 3.226126] Key type dns_resolver registered
[ 3.235071] registered taskstats version 1
[ 3.244776] Btrfs loaded, crc32c=crc32c-generic
[ 3.265266] rtc_zynqmp ffa60000.rtc: setting system clock to 2031-07-12 04:41:34 UTC (1941597694)
[ 3.274303] clk: Not disabling unused clocks
[ 3.278584] ALSA device list:
[ 3.281523] No soundcards found.
[ 3.285566] VFS: Cannot open root device "mmcblk0p9" or unknown-block(0,0): error -6
[ 3.293338] Please append a correct "root=" boot option; here are the available partitions:
[ 3.301758] 0100 65536 ram0 [ 3.305325] (driver?)
[ 3.307696] 0101 65536 ram1 [ 3.311275] (driver?)
[ 3.313658] 0102 65536 ram2 [ 3.317245] (driver?)
[ 3.319611] 0103 65536 ram3 [ 3.323207] (driver?)
[ 3.325582] 0104 65536 ram4 [ 3.329168] (driver?)
[ 3.331535] 0105 65536 ram5 [ 3.335131] (driver?)
[ 3.337505] 0106 65536 ram6 [ 3.341093] (driver?)
[ 3.343459] 0107 65536 ram7 [ 3.347055] (driver?)
[ 3.349430] 0108 65536 ram8 [ 3.353017] (driver?)
[ 3.355383] 0109 65536 ram9 [ 3.358979] (driver?)
[ 3.361353] 010a 65536 ram10 [ 3.365028] (driver?)
[ 3.367395] 010b 65536 ram11 [ 3.371079] (driver?)
[ 3.373453] 010c 65536 ram12 [ 3.377127] (driver?)
[ 3.379494] 010d 65536 ram13 [ 3.383178] (driver?)
[ 3.385552] 010e 65536 ram14 [ 3.389229] (driver?)
[ 3.391594] 010f 65536 ram15 [ 3.395278] (driver?)
[ 3.397654] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 3.405982] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.9.0-xilinx-v2017.1 #1
[ 3.413162] Hardware name: xlnx,zynqmp (DT)
[ 3.417370] Call trace:
[ 3.419832] [<ffffff8008088118>] dump_backtrace+0x0/0x198
[ 3.425265] [<ffffff80080