Linux 3.16 boot hangs at initramfs scripts when mounting filesystems
From: Petri Gynther
Date: Wed Aug 13 2014 - 22:12:35 EST
Hi linux-kernel and linux-mips:
I'm trying to boot Linux 3.16 on Broadcom BMIPS5000-based platform.
However, 90% of the time, the system hangs at initramfs scripts at one
of the mount commands. I'm also seeing this same issue when booting
Linux 3.15.
Please see the boot log below. At 2.583000, MMC partitions seem to be
detected correctly. At 2.809000 initramfs scripts start to run. The
scripts attempt to run the following commands:
strace mount -t devtmpfs none /dev
strace mount -t proc none /proc
strace mount -t sysfs none /sys
strace mkdir /dev/pts /dev/shm
strace mount -t devpts none /dev/pts
strace mount -t tmpfs none /dev/shm
strace mount -t debugfs none /sys/kernel/debug
strace mount -o ro -t squashfs /dev/mmcblk0p19 /rootfs
[ 0.000000] Linux version 3.16.0 ... (gcc version 4.5.3 (Broadcom
stbgcc-4.5.3-1.3) ) #4 SMP Wed Aug 13 18:13:44 PDT 2014
[ 0.000000] Fetching vars from bootloader... found 10 vars.
[ 0.000000] Options: moca=1 sata=0 pcie=0 usb=1
[ 0.000000] Using 1024 MB + 0 MB RAM (from CFE)
[ 0.000000] bootconsole [early0] enabled
[ 0.000000] CPU0 revision is: 00025a11 (Broadcom BMIPS5000)
[ 0.000000] FPU revision is: 00130001
[ 0.000000] Determined physical RAM map:
[ 0.000000] memory: 10000000 @ 00000000 (usable)
[ 0.000000] memory: 30000000 @ 20000000 (usable)
[ 0.000000] bmem: adding 109 MB LINUX region at 18 MB (0x06d0a000@0x012f6000)
[ 0.000000] bmem: adding 128 MB RESERVED region at 128 MB
(0x08000000@0x08000000)
[ 0.000000] bmem: adding 320 MB RESERVED region at 512 MB
(0x14000000@0x20000000)
[ 0.000000] bmem: adding 448 MB LINUX region at 832 MB
(0x1c000000@0x34000000)
[ 0.000000] Initrd not found or empty - disabling initrd
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x00000000-0x4fffffff]
[ 0.000000] HighMem empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x00000000-0x0fffffff]
[ 0.000000] node 0: [mem 0x20000000-0x4fffffff]
[ 0.000000] On node 0 totalpages: 262144
[ 0.000000] Normal zone: 2048 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 262144 pages, LIFO batch:31
[ 0.000000] Primary instruction cache 32kB, physically tagged,
4-way, linesize 64 bytes.
[ 0.000000] Primary data cache 32kB, 4-way, linesize 32 bytes.
[ 0.000000] MIPS secondary cache 256kB, 8-way, linesize 128 bytes.
[ 0.000000] PERCPU: Embedded 9 pages/cpu @81b1a000 s12416 r8192 d16256 u36864
[ 0.000000] pcpu-alloc: s12416 r8192 d16256 u36864 alloc=9*4096
[ 0.000000] pcpu-alloc: [0] 0 [0] 1
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on.
Total pages: 260096
[ 0.000000] Kernel command line: splashmem=0x0/4m@memc1
cfe_ver=3.53.24 display=on rootfstype=squashfs partitionver=2
root=rootfs1 debug bmem=128m@128m bmem=320m@512m log_buf_len=8388608
[ 0.000000] Switched partition from version 0 to version 2.
[ 0.000000] log_buf_len: 8388608
[ 0.000000] early log buf free: 13880(84%)
[ 0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
[ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
[ 0.000000] Memory: 553056K/1048576K available (7245K kernel code,
434K rwdata, 1944K rodata, 1688K init, 8087K bss, 495520K reserved, 0K
highmem)
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] NR_IRQS:160
[ 0.000000] Measuring MIPS counter frequency...
[ 0.000000] Detected MIPS clock frequency: 1305 MHz (163.136 MHz counter)
[ 0.001000] Console: colour dummy device 80x25
[ 0.002000] Lock dependency validator: Copyright (c) 2006 Red Hat,
Inc., Ingo Molnar
[ 0.003000] ... MAX_LOCKDEP_SUBCLASSES: 8
[ 0.004000] ... MAX_LOCK_DEPTH: 48
[ 0.005000] ... MAX_LOCKDEP_KEYS: 8191
[ 0.006000] ... CLASSHASH_SIZE: 4096
[ 0.007000] ... MAX_LOCKDEP_ENTRIES: 32768
[ 0.008000] ... MAX_LOCKDEP_CHAINS: 65536
[ 0.009000] ... CHAINHASH_SIZE: 32768
[ 0.010000] memory used by lock dependency info: 5167 kB
[ 0.011000] per task-struct memory footprint: 1152 bytes
[ 0.018000] Calibrating delay loop... 864.25 BogoMIPS (lpj=432128)
[ 0.029000] pid_max: default: 32768 minimum: 301
[ 0.032000] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.033000] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.040000] ftrace: allocating 21366 entries in 42 pages
[ 0.087000] SMP: Booting CPU1...
[ 0.088000] CPU1 revision is: 00025a11 (Broadcom BMIPS5000)
[ 0.088000] FPU revision is: 00130001
[ 0.088000] Primary instruction cache 32kB, physically tagged,
4-way, linesize 64 bytes.
[ 0.088000] Primary data cache 32kB, 4-way, linesize 32 bytes.
[ 0.088000] MIPS secondary cache 256kB, 8-way, linesize 128 bytes.
[ 0.098000] SMP: CPU1 is running
[ 0.098000] Brought up 2 CPUs
[ 0.136000] devtmpfs: initialized
[ 0.187000] kworker/u4:0 (19) used greatest stack depth: 6164 bytes left
[ 0.196000] NET: Registered protocol family 16
[ 0.198000] kworker/u4:0 (20) used greatest stack depth: 6060 bytes left
[ 0.205000] kworker/u4:0 (21) used greatest stack depth: 5732 bytes left
[ 0.217000] USB0: power enable is active high; overcurrent is active low
[ 0.218000] USB1: power enable is active high; overcurrent is active low
[ 0.246000] kworker/u4:0 (51) used greatest stack depth: 5684 bytes left
[ 0.364000] SCSI subsystem initialized
[ 0.366000] libata version 3.00 loaded.
[ 0.371000] usbcore: registered new interface driver usbfs
[ 0.373000] usbcore: registered new interface driver hub
[ 0.374000] usbcore: registered new device driver usb
[ 0.379000] Advanced Linux Sound Architecture Driver Initialized.
[ 0.391000] Switched to clocksource wktmr
[ 0.708000] kworker/u4:0 (311) used greatest stack depth: 5356 bytes left
[ 0.716000] NET: Registered protocol family 2
[ 0.726000] TCP established hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.734000] TCP bind hash table entries: 8192 (order: 6, 294912 bytes)
[ 0.743000] TCP: Hash tables configured (established 8192 bind 8192)
[ 0.750000] TCP: reno registered
[ 0.753000] UDP hash table entries: 512 (order: 3, 40960 bytes)
[ 0.760000] UDP-Lite hash table entries: 512 (order: 3, 40960 bytes)
[ 0.769000] NET: Registered protocol family 1
[ 0.777000] RPC: Registered named UNIX socket transport module.
[ 0.783000] RPC: Registered udp transport module.
[ 0.788000] RPC: Registered tcp transport module.
[ 0.792000] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.976000] futex hash table entries: 512 (order: 3, 32768 bytes)
[ 0.982000] hotplug (321) used greatest stack depth: 5244 bytes left
[ 1.003000] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 1.021000] NFS: Registering the id_resolver key type
[ 1.026000] Key type id_resolver registered
[ 1.030000] Key type id_legacy registered
[ 1.034000] jffs2: version 2.2. (NAND) ï 2001-2006 Red Hat, Inc.
[ 1.043000] fuse init (API version 7.23)
[ 1.050000] msgmni has been set to 1080
[ 1.056000] hotplug (330) used greatest stack depth: 4972 bytes left
[ 1.063000] io scheduler noop registered
[ 1.067000] io scheduler cfq registered (default)
[ 1.074000] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[ 1.111000] console [ttyS0] disabled
[ 1.116000] serial8250.0: ttyS0 at MMIO 0x10406700 (irq = 52,
base_baud = 5062500) is a 16550A
[ 1.124000] console [ttyS0] enabled
[ 1.124000] console [ttyS0] enabled
[ 1.131000] bootconsole [early0] disabled
[ 1.131000] bootconsole [early0] disabled
[ 1.145000] serial8250.0: ttyS1 at MMIO 0x10406740 (irq = 53,
base_baud = 5062500) is a 16550A
[ 1.160000] serial8250.0: ttyS2 at MMIO 0x10406780 (irq = 54,
base_baud = 5062500) is a 16550A
[ 1.262000] hotplug (361) used greatest stack depth: 4860 bytes left
[ 1.331000] brd: module loaded
[ 1.394000] hotplug (382) used greatest stack depth: 4772 bytes left
[ 1.445000] loop: module loaded
[ 1.464000] brcmstb_nand: NAND controller driver is loaded
[ 1.471000] __clk_enable: network [1]
[ 1.475000] bcm7429_pm_network_enable 00
[ 1.479000] __clk_enable: enet [1]
[ 1.482000] bcm40nm_pm_genet_enable 00
[ 1.505000] bcmgenet: PHY device 0x600d:0x8731 at 1
[ 1.610000] bcmgenet: configuring instance #0 for internal PHY
[ 1.632000] bcmgenet bcmgenet.0 eth0: link down
[ 1.637000] __clk_disable: enet [0]
[ 1.637000] bcm40nm_pm_genet_disable 00
[ 1.637000] __clk_disable: network [0]
[ 1.637000] bcm7429_pm_network_disable 00
[ 1.652000] __clk_enable: network [1]
[ 1.652000] bcm7429_pm_network_enable 00
[ 1.652000] __clk_enable: moca_genet [1]
[ 1.652000] bcm40nm_pm_genet1_enable 00
[ 1.652000] __clk_enable: moca [1]
[ 1.652000] bcm40nm_pm_moca_enable 00
[ 1.681000] bcmgenet: PHY device 0x0:0x0 at -2
[ 1.686000] bcmgenet: configuring instance #1 for MoCA
[ 1.697000] __clk_disable: moca [0]
[ 1.697000] bcm40nm_pm_moca_disable 00
[ 1.697000] __clk_disable: moca_genet [0]
[ 1.697000] bcm40nm_pm_genet1_disable 00
[ 1.697000] __clk_disable: network [0]
[ 1.697000] bcm7429_pm_network_disable 00
[ 1.721000] pegasus: v0.9.3 (2013/04/25), Pegasus/Pegasus II USB
Ethernet driver
[ 1.730000] usbcore: registered new interface driver pegasus
[ 1.737000] usbcore: registered new interface driver asix
[ 1.743000] usbcore: registered new interface driver ax88179_178a
[ 1.750000] usbcore: registered new interface driver cdc_ether
[ 1.757000] usbcore: registered new interface driver net1080
[ 1.764000] usbcore: registered new interface driver cdc_subset
[ 1.770000] usbcore: registered new interface driver zaurus
[ 1.777000] usbcore: registered new interface driver cdc_ncm
[ 1.787000] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.794000] __clk_enable: usb [1]
[ 1.794000] bcm40nm_pm_usb_enable 00
[ 1.801000] ehci-brcm ehci-brcm.0: Broadcom STB EHCI
[ 1.812000] ehci-brcm ehci-brcm.0: new USB bus registered, assigned
bus number 1
[ 1.830000] drivers/usb/host/ehci-brcm.c:ehci_port_power - Not Implemented!
[ 1.837000] ehci-brcm ehci-brcm.0: irq 56, io mem 0x10480300
[ 1.849000] ehci-brcm ehci-brcm.0: USB 0.0 started, EHCI 1.00
[ 1.867000] hub 1-0:1.0: USB hub found
[ 1.871000] hub 1-0:1.0: 1 port detected
[ 1.883000] ehci-brcm ehci-brcm.1: Broadcom STB EHCI
[ 1.890000] ehci-brcm ehci-brcm.1: new USB bus registered, assigned
bus number 2
[ 1.909000] drivers/usb/host/ehci-brcm.c:ehci_port_power - Not Implemented!
[ 1.916000] ehci-brcm ehci-brcm.1: irq 57, io mem 0x10480500
[ 1.928000] ehci-brcm ehci-brcm.1: USB 0.0 started, EHCI 1.00
[ 1.942000] hub 2-0:1.0: USB hub found
[ 1.947000] hub 2-0:1.0: 1 port detected
[ 1.957000] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 1.964000] ohci-brcm ohci-brcm.0: Broadcom STB OHCI
[ 1.971000] ohci-brcm ohci-brcm.0: new USB bus registered, assigned
bus number 3
[ 1.979000] ohci-brcm ohci-brcm.0: irq 58, io mem 0x10480400
[ 2.059000] hub 3-0:1.0: USB hub found
[ 2.064000] hub 3-0:1.0: 1 port detected
[ 2.075000] ohci-brcm ohci-brcm.1: Broadcom STB OHCI
[ 2.082000] ohci-brcm ohci-brcm.1: new USB bus registered, assigned
bus number 4
[ 2.090000] ohci-brcm ohci-brcm.1: irq 59, io mem 0x10480600
[ 2.166000] hub 4-0:1.0: USB hub found
[ 2.171000] hub 4-0:1.0: 1 port detected
[ 2.182000] usbcore: registered new interface driver usb-storage
[ 2.192000] mousedev: PS/2 mouse device common for all mice
[ 2.201000] device-mapper: ioctl: 4.27.0-ioctl (2013-10-30)
initialised: dm-devel@xxxxxxxxxx
[ 2.211000] sdhci: Secure Digital Host Controller Interface driver
[ 2.217000] sdhci: Copyright(c) Pierre Ossman
[ 2.222000] sdhci-pltfm: SDHCI platform and OF driver helper
[ 2.228000] sdhci-brcmstb sdhci-brcmstb.0: Enabling controller
[ 2.236000] mmc0: no vqmmc regulator found
[ 2.240000] mmc0: no vmmc regulator found
[ 2.278000] mmc0: SDHCI controller on sdhci-brcmstb.0
[sdhci-brcmstb.0] using ADMA
[ 2.288000] sdhci-brcmstb sdhci-brcmstb.1: Enabling controller
[ 2.297000] mmc1: no vqmmc regulator found
[ 2.302000] mmc1: no vmmc regulator found
[ 2.340000] mmc1: SDHCI controller on sdhci-brcmstb.1
[sdhci-brcmstb.1] using ADMA
[ 2.351000] usbcore: registered new interface driver usbhid
[ 2.356000] usbhid: USB HID core driver
[ 2.368000] TCP: cubic registered
[ 2.374000] NET: Registered protocol family 10
[ 2.393000] sit: IPv6 over IPv4 tunneling driver
[ 2.403000] mmc0: new ultra high speed SDR50 SDIO card at address 0001
[ 2.408000] NET: Registered protocol family 17
[ 2.416000] 8021q: 802.1Q VLAN Support v1.8
[ 2.421000] Key type dns_resolver registered
[ 2.430000] PM: CP0 COUNT/COMPARE frequency does not depend on divisor
[ 2.475000] kmemleak: Kernel memory leak detector initialized
[ 2.485000] EBI CS0: setting up SPI flash
[ 2.493000] spi_brcmstb spi_brcmstb.0: master is unqueued, this is deprecated
[ 2.493000] kmemleak: Automatic memory scanning thread started
[ 2.514000] spi_brcmstb spi_brcmstb.0: 1-lane output, 3-byte address
[ 2.524000] mmc1: BKOPS_EN bit is not set
[ 2.531000] m25p80 spi0.0: found mx25l3255d, expected m25p80
[ 2.533000] mmc1: new high speed MMC card at address 0001
[ 2.542000] m25p80 spi0.0: mx25l3255d (4096 Kbytes)
[ 2.549000] Creating 10 MTD partitions on "spi0.0":
[ 2.554000] 0x000000000000-0x000000200000 : "cfe"
[ 2.555000] mmcblk0: mmc1:0001 4FEACB 3.64 GiB
[ 2.583000] mmcblk0: p16 p17 p18 p19 p20 p21
[ 2.583000] 0x000000200000-0x000000370000 : ...
[ 2.597000] 0x000000370000-0x000000380000 : ...
[ 2.626000] 0x000000380000-0x000000390000 : ...
[ 2.655000] 0x000000390000-0x0000003a0000 : ...
[ 2.680000] 0x0000003a0000-0x0000003b0000 : ...
[ 2.701000] 0x0000003b0000-0x0000003c0000 : ...
[ 2.723000] 0x0000003c0000-0x0000003d0000 : ...
[ 2.744000] 0x0000003d0000-0x0000003e0000 : ...
[ 2.766000] 0x0000003e0000-0x000000400000 : ...
[ 2.796000] ALSA device list:
[ 2.799000] No soundcards found.
[ 2.809000] Freeing unused kernel memory: 1688K (8096a000 - 80b10000)
---- initramfs ('/init')
To bypass this script, use rdinit=/bin/sh
execve("/bin/mount", ["mount", "-t", "devtmpfs", "none", "/dev"], [/*
10 vars */]) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x7716a000
stat("/etc/ld.so.cache", 0x7f832118) = -1 ENOENT (No such file or directory)
open("/lib/libpthread.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=108126, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77167000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0@?\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 151552, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7712d000
old_mmap(0x7712d000, 71708, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x7712d000
old_mmap(0x7714e000, 4916, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x11000) = 0x7714e000
old_mmap(0x77150000, 5184, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x77150000
close(3) = 0
munmap(0x77167000, 4096) = 0
open("/lib/libgcc_s.so.1", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=201808, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77167000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\200\306\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 225280, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x770f6000
old_mmap(0x770f6000, 155636, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x770f6000
old_mmap(0x7712c000, 2308, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x26000) = 0x7712c000
close(3) = 0
munmap(0x77167000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77167000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0@\260\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 761856, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7703c000
old_mmap(0x7703c000, 664844, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x7703c000
old_mmap(0x770ee000, 7904, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0xa2000) = 0x770ee000
old_mmap(0x770f0000, 23052, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x770f0000
close(3) = 0
munmap(0x77167000, 4096) = 0
open("/lib/libdl.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=9576, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77167000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\300\t\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 77824, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77029000
old_mmap(0x77029000, 7920, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED,
3, 0) = 0x77029000
old_mmap(0x7703a000, 4256, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x1000) = 0x7703a000
close(3) = 0
munmap(0x77167000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
stat("/lib/ld-uClibc.so.0", {st_mode=S_IFREG|0750, st_size=31672, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77167000
set_thread_area(0x7716e460) = 0
mprotect(0x7714e000, 4096, PROT_READ) = 0
mprotect(0x770ee000, 4096, PROT_READ) = 0
mprotect(0x7703a000, 4096, PROT_READ) = 0
mprotect(0x77168000, 4096, PROT_READ) = 0
set_tid_address(0x77167068) = 525
SYS_4309() = 0
rt_sigaction(SIGRT_0, {0x8, [RT_93 RT_94 RT_95],
SA_RESTART|SA_INTERRUPT|SA_NODEFER|SA_NOCLDWAIT|0x7125e84}, NULL, 16)
= 0
rt_sigaction(SIGRT_1, {0x10000008, [RT_93 RT_94 RT_95],
SA_RESTART|SA_INTERRUPT|SA_NODEFER|SA_NOCLDWAIT|0x7125d60}, NULL, 16)
= 0
rt_sigprocmask(SIG_UNBLOCK, [RT_0 RT_1], NULL, 16) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=268435464}) = 0
ioctl(0, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
ioctl(1, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
mount("none", "/dev", "devtmpfs", MS_SILENT, NULL) = 0
exit_group(0) = ?
mounted /dev
execve("/bin/mount", ["mount", "-t", "proc", "none", "/proc"], [/* 10
vars */]) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77e23000
stat("/etc/ld.so.cache", 0x7f895a08) = -1 ENOENT (No such file or directory)
open("/lib/libpthread.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=108126, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77e22000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0@?\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 151552, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77de9000
old_mmap(0x77de9000, 71708, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x77de9000
old_mmap(0x77e0a000, 4916, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x11000) = 0x77e0a000
old_mmap(0x77e0c000, 5184, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x77e0c000
close(3) = 0
munmap(0x77e22000, 4096) = 0
open("/lib/libgcc_s.so.1", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=201808, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77e22000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\200\306\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 225280, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77db2000
old_mmap(0x77db2000, 155636, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x77db2000
old_mmap(0x77de8000, 2308, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x26000) = 0x77de8000
close(3) = 0
munmap(0x77e22000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77e22000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0@\260\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 761856, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77cf8000
old_mmap(0x77cf8000, 664844, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x77cf8000
old_mmap(0x77daa000, 7904, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0xa2000) = 0x77daa000
old_mmap(0x77dac000, 23052, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x77dac000
close(3) = 0
munmap(0x77e22000, 4096) = 0
open("/lib/libdl.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=9576, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77e22000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\300\t\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 77824, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77ce5000
old_mmap(0x77ce5000, 7920, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED,
3, 0) = 0x77ce5000
old_mmap(0x77cf6000, 4256, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x1000) = 0x77cf6000
close(3) = 0
munmap(0x77e22000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
stat("/lib/ld-uClibc.so.0", {st_mode=S_IFREG|0750, st_size=31672, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77e22000
set_thread_area(0x77e29460) = 0
mprotect(0x77e0a000, 4096, PROT_READ) = 0
mprotect(0x77daa000, 4096, PROT_READ) = 0
mprotect(0x77cf6000, 4096, PROT_READ) = 0
mprotect(0x77e24000, 4096, PROT_READ) = 0
set_tid_address(0x77e22068) = 533
SYS_4309() = 0
rt_sigaction(SIGRT_0, {0x8, [RT_93 RT_94 RT_95],
SA_RESTART|SA_INTERRUPT|SA_NODEFER|SA_NOCLDWAIT|0x7de1e84}, NULL, 16)
= 0
rt_sigaction(SIGRT_1, {0x10000008, [RT_93 RT_94 RT_95],
SA_RESTART|SA_INTERRUPT|SA_NODEFER|SA_NOCLDWAIT|0x7de1d60}, NULL, 16)
= 0
rt_sigprocmask(SIG_UNBLOCK, [RT_0 RT_1], NULL, 16) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=268435464}) = 0
ioctl(0, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
ioctl(1, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
mount("none", "/proc", "proc", MS_SILENT, NULL) = 0
exit_group(0) = ?
mounted /proc
[ 3.714000] random: nonblocking pool is initialized
execve("/bin/mount", ["mount", "-t", "sysfs", "none", "/sys"], [/* 10
vars */]) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77e5a000
stat("/etc/ld.so.cache", 0x7ff33108) = -1 ENOENT (No such file or directory)
open("/lib/libpthread.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=108126, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77e57000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0@?\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 151552, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77e1d000
old_mmap(0x77e1d000, 71708, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x77e1d000
old_mmap(0x77e3e000, 4916, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x11000) = 0x77e3e000
old_mmap(0x77e40000, 5184, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x77e40000
close(3) = 0
munmap(0x77e57000, 4096) = 0
open("/lib/libgcc_s.so.1", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=201808, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77e57000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\200\306\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 225280, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77de6000
old_mmap(0x77de6000, 155636, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x77de6000
old_mmap(0x77e1c000, 2308, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x26000) = 0x77e1c000
close(3) = 0
munmap(0x77e57000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77e57000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0@\260\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 761856, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77d2c000
old_mmap(0x77d2c000, 664844, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x77d2c000
old_mmap(0x77dde000, 7904, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0xa2000) = 0x77dde000
old_mmap(0x77de0000, 23052, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x77de0000
close(3) = 0
munmap(0x77e57000, 4096) = 0
open("/lib/libdl.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=9576, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77e57000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\300\t\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 77824, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77d19000
old_mmap(0x77d19000, 7920, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED,
3, 0) = 0x77d19000
old_mmap(0x77d2a000, 4256, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x1000) = 0x77d2a000
close(3) = 0
munmap(0x77e57000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
stat("/lib/ld-uClibc.so.0", {st_mode=S_IFREG|0750, st_size=31672, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77e57000
set_thread_area(0x77e5e460) = 0
mprotect(0x77e3e000, 4096, PROT_READ) = 0
mprotect(0x77dde000, 4096, PROT_READ) = 0
mprotect(0x77d2a000, 4096, PROT_READ) = 0
mprotect(0x77e58000, 4096, PROT_READ) = 0
set_tid_address(0x77e57068) = 535
SYS_4309() = 0
rt_sigaction(SIGRT_0, {0x8, [RT_93 RT_94 RT_95],
SA_RESTART|SA_INTERRUPT|SA_NODEFER|0x7e25e84}, NULL, 16) = 0
rt_sigaction(SIGRT_1, {0x10000008, [RT_93 RT_94 RT_95],
SA_RESTART|SA_INTERRUPT|SA_NODEFER|0x7e25d60}, NULL, 16) = 0
rt_sigprocmask(SIG_UNBLOCK, [RT_0 RT_1], NULL, 16) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=268435464}) = 0
ioctl(0, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
ioctl(1, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
mount("none", "/sys", "sysfs", MS_SILENT, NULL) = 0
exit_group(0) = ?
mounted /sys
execve("/bin/mkdir", ["mkdir", "/dev/pts", "/dev/shm"], [/* 10 vars */]) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77cad000
stat("/etc/ld.so.cache", 0x7f991ea8) = -1 ENOENT (No such file or directory)
open("/lib/libpthread.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=108126, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77cac000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0@?\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 151552, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77c73000
old_mmap(0x77c73000, 71708, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x77c73000
old_mmap(0x77c94000, 4916, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x11000) = 0x77c94000
old_mmap(0x77c96000, 5184, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x77c96000
close(3) = 0
munmap(0x77cac000, 4096) = 0
open("/lib/libgcc_s.so.1", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=201808, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77cac000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\200\306\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 225280, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77c3c000
old_mmap(0x77c3c000, 155636, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x77c3c000
old_mmap(0x77c72000, 2308, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x26000) = 0x77c72000
close(3) = 0
munmap(0x77cac000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77cac000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0@\260\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 761856, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77b82000
old_mmap(0x77b82000, 664844, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x77b82000
old_mmap(0x77c34000, 7904, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0xa2000) = 0x77c34000
old_mmap(0x77c36000, 23052, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x77c36000
close(3) = 0
munmap(0x77cac000, 4096) = 0
open("/lib/libdl.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=9576, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77cac000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\300\t\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 77824, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77b6f000
old_mmap(0x77b6f000, 7920, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED,
3, 0) = 0x77b6f000
old_mmap(0x77b80000, 4256, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x1000) = 0x77b80000
close(3) = 0
munmap(0x77cac000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
stat("/lib/ld-uClibc.so.0", {st_mode=S_IFREG|0750, st_size=31672, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77cac000
set_thread_area(0x77cb3460) = 0
mprotect(0x77c94000, 4096, PROT_READ) = 0
mprotect(0x77c34000, 4096, PROT_READ) = 0
mprotect(0x77b80000, 4096, PROT_READ) = 0
mprotect(0x77cae000, 4096, PROT_READ) = 0
set_tid_address(0x77cac068) = 537
SYS_4309() = 0
rt_sigaction(SIGRT_0, {0x8, [RT_93 RT_94 RT_95],
SA_RESTART|SA_INTERRUPT|SA_NODEFER|SA_NOCLDWAIT|0x7c6be84}, NULL, 16)
= 0
rt_sigaction(SIGRT_1, {0x10000008, [RT_93 RT_94 RT_95],
SA_RESTART|SA_INTERRUPT|SA_NODEFER|SA_NOCLDWAIT|0x7c6bd60}, NULL, 16)
= 0
rt_sigprocmask(SIG_UNBLOCK, [RT_0 RT_1], NULL, 16) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=268435464}) = 0
ioctl(0, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
ioctl(1, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
mkdir("/dev/pts", 0777) = 0
mkdir("/dev/shm", 0777) = 0
exit_group(0) = ?
execve("/bin/mount", ["mount", "-t", "devpts", "none", "/dev/pts"],
[/* 10 vars */]) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x770de000
stat("/etc/ld.so.cache", 0x7fd44438) = -1 ENOENT (No such file or directory)
open("/lib/libpthread.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=108126, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x770db000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0@?\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 151552, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x770a1000
old_mmap(0x770a1000, 71708, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x770a1000
old_mmap(0x770c2000, 4916, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x11000) = 0x770c2000
old_mmap(0x770c4000, 5184, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x770c4000
close(3) = 0
munmap(0x770db000, 4096) = 0
open("/lib/libgcc_s.so.1", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=201808, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x770db000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\200\306\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 225280, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7706a000
old_mmap(0x7706a000, 155636, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x7706a000
old_mmap(0x770a0000, 2308, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x26000) = 0x770a0000
close(3) = 0
munmap(0x770db000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x770db000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0@\260\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 761856, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x76fb0000
old_mmap(0x76fb0000, 664844, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x76fb0000
old_mmap(0x77062000, 7904, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0xa2000) = 0x77062000
old_mmap(0x77064000, 23052, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x77064000
close(3) = 0
munmap(0x770db000, 4096) = 0
open("/lib/libdl.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=9576, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x770db000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\300\t\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 77824, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x76f9d000
old_mmap(0x76f9d000, 7920, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED,
3, 0) = 0x76f9d000
old_mmap(0x76fae000, 4256, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x1000) = 0x76fae000
close(3) = 0
munmap(0x770db000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
stat("/lib/ld-uClibc.so.0", {st_mode=S_IFREG|0750, st_size=31672, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x770db000
set_thread_area(0x770e2460) = 0
mprotect(0x770c2000, 4096, PROT_READ) = 0
mprotect(0x77062000, 4096, PROT_READ) = 0
mprotect(0x76fae000, 4096, PROT_READ) = 0
mprotect(0x770dc000, 4096, PROT_READ) = 0
set_tid_address(0x770db068) = 539
SYS_4309() = 0
rt_sigaction(SIGRT_0, {0x8, [RT_93 RT_94 RT_95],
SA_RESTART|SA_INTERRUPT|SA_NODEFER|0x70a9e84}, NULL, 16) = 0
rt_sigaction(SIGRT_1, {0x10000008, [RT_93 RT_94 RT_95],
SA_RESTART|SA_INTERRUPT|SA_NODEFER|0x70a9d60}, NULL, 16) = 0
rt_sigprocmask(SIG_UNBLOCK, [RT_0 RT_1], NULL, 16) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=268435464}) = 0
ioctl(0, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
ioctl(1, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
mount("none", "/dev/pts", "devpts", MS_SILENT, NULL) = 0
exit_group(0) = ?
mounted /dev/pts
execve("/bin/mount", ["mount", "-t", "tmpfs", "none", "/dev/shm"], [/*
10 vars */]) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x7724e000
stat("/etc/ld.so.cache", 0x7fa16e58) = -1 ENOENT (No such file or directory)
open("/lib/libpthread.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=108126, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x7724b000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0@?\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 151552, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77211000
old_mmap(0x77211000, 71708, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x77211000
old_mmap(0x77232000, 4916, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x11000) = 0x77232000
old_mmap(0x77234000, 5184, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x77234000
close(3) = 0
munmap(0x7724b000, 4096) = 0
open("/lib/libgcc_s.so.1", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=201808, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x7724b000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\200\306\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 225280, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x771da000
old_mmap(0x771da000, 155636, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x771da000
old_mmap(0x77210000, 2308, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x26000) = 0x77210000
close(3) = 0
munmap(0x7724b000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x7724b000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0@\260\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 761856, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77120000
old_mmap(0x77120000, 664844, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x77120000
old_mmap(0x771d2000, 7904, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0xa2000) = 0x771d2000
old_mmap(0x771d4000, 23052, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x771d4000
close(3) = 0
munmap(0x7724b000, 4096) = 0
open("/lib/libdl.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=9576, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x7724b000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\300\t\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 77824, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7710d000
old_mmap(0x7710d000, 7920, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED,
3, 0) = 0x7710d000
old_mmap(0x7711e000, 4256, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x1000) = 0x7711e000
close(3) = 0
munmap(0x7724b000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
stat("/lib/ld-uClibc.so.0", {st_mode=S_IFREG|0750, st_size=31672, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x7724b000
set_thread_area(0x77252460) = 0
mprotect(0x77232000, 4096, PROT_READ) = 0
mprotect(0x771d2000, 4096, PROT_READ) = 0
mprotect(0x7711e000, 4096, PROT_READ) = 0
mprotect(0x7724c000, 4096, PROT_READ) = 0
set_tid_address(0x7724b068) = 541
SYS_4309() = 0
rt_sigaction(SIGRT_0, {0x8, [RT_93 RT_94 RT_95],
SA_RESTART|SA_INTERRUPT|SA_NODEFER|SA_NOCLDWAIT|0x7209e84}, NULL, 16)
= 0
rt_sigaction(SIGRT_1, {0x10000008, [RT_93 RT_94 RT_95],
SA_RESTART|SA_INTERRUPT|SA_NODEFER|SA_NOCLDWAIT|0x7209d60}, NULL, 16)
= 0
rt_sigprocmask(SIG_UNBLOCK, [RT_0 RT_1], NULL, 16) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=268435464}) = 0
ioctl(0, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
ioctl(1, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
mount("none", "/dev/shm", "tmpfs", MS_SILENT, NULL) = 0
exit_group(0) = ?
mounted /dev/shm
execve("/bin/mount", ["mount", "-t", "debugfs", "none",
"/sys/kernel/debug"], [/* 10 vars */]) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77945000
stat("/etc/ld.so.cache", 0x7fa4b758) = -1 ENOENT (No such file or directory)
open("/lib/libpthread.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=108126, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77944000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0@?\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 151552, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7790b000
old_mmap(0x7790b000, 71708, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x7790b000
old_mmap(0x7792c000, 4916, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x11000) = 0x7792c000
old_mmap(0x7792e000, 5184, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7792e000
close(3) = 0
munmap(0x77944000, 4096) = 0
open("/lib/libgcc_s.so.1", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=201808, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77944000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\200\306\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 225280, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x778d4000
old_mmap(0x778d4000, 155636, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x778d4000
old_mmap(0x7790a000, 2308, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x26000) = 0x7790a000
close(3) = 0
munmap(0x77944000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77944000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0@\260\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 761856, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7781a000
old_mmap(0x7781a000, 664844, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x7781a000
old_mmap(0x778cc000, 7904, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0xa2000) = 0x778cc000
old_mmap(0x778ce000, 23052, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x778ce000
close(3) = 0
munmap(0x77944000, 4096) = 0
open("/lib/libdl.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=9576, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77944000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\300\t\0\0004\0\0\0"...,
4096) = 4096
old_mmap(NULL, 77824, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77807000
old_mmap(0x77807000, 7920, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED,
3, 0) = 0x77807000
old_mmap(0x77818000, 4256, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x1000) = 0x77818000
close(3) = 0
munmap(0x77944000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0750, st_size=720980, ...}) = 0
close(3) = 0
stat("/lib/ld-uClibc.so.0", {st_mode=S_IFREG|0750, st_size=31672, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|0x4000000, -1, 0) = 0x77944000
set_thread_area(0x7794b460) = 0
mprotect(0x7792c000, 4096, PROT_READ) = 0
mprotect(0x778cc000, 4096, PROT_READ) = 0
mprotect(0x77818000, 4096, PROT_READ) = 0
mprotect(0x77946000, 4096, PROT_READ) = 0
set_tid_address(0x77944068) = 543
SYS_4309() = 0
rt_sigaction(SIGRT_0, {0x8, [RT_93 RT_94 RT_95],
SA_RESTART|SA_INTERRUPT|SA_NODEFER|SA_NOCLDWAIT|0x7903e84}, NULL, 16)
= 0
rt_sigaction(SIGRT_1, {0x10000008, [RT_93 RT_94 RT_95],
SA_RESTART|SA_INTERRUPT|SA_NODEFER|SA_NOCLDWAIT|0x7903d60}, NULL, 16)
= 0
rt_sigprocmask(SIG_UNBLOCK, [RT_0 RT_1], NULL, 16) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=268435464}) = 0
ioctl(0, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
ioctl(1, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
mount("none", "/sys/kernel/debug", "debugfs", MS_SILENT, NULL) = 0
exit_group(0) = ?
mounted /sys/kernel/debug
< boot hangs here >
[ 40.338000] INFO: task kmemleak:467 blocked for more than 20 seconds.
[ 40.344000] Not tainted 3.16.0-gfiber0-g8f44b1b-dirty #4
[ 40.350000] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[ 40.358000] kmemleak D 8070b79c 7104 467 2 0x00100000
[ 40.364000] Stack : ffffffff 80950000 80b13ec0 807122ec cf416050
ceaabe24 cf290a00 80b13ec0
8071a420 ffffffff 80950000 80085788 10008701 00000000
cff80cd0 cff80a80
81b1c900 10008701 fffc603e 80900000 ceaabe24 80b13ec0
80b13ec0 8071a420
ffffffff 80950000 ffdfffff 8070b79c 00000001 cfca1d8c
10008701 cff80f60
10008701 80b14a7c 80b14a7c fffc603e 80b13ec0 80039698
cff80a80 ffffffff
...
[ 40.402000] Call Trace:
[ 40.404000] [<8070c204>] __schedule+0x4a4/0x8d4
[ 40.409000] [<8070b79c>] schedule_timeout+0x144/0x21c
[ 40.414000] [<8003a10c>] msleep+0x34/0x44
[ 40.418000] [<801495d4>] kmemleak_scan_thread+0xf0/0xf8
[ 40.423000] [<800538c0>] kthread+0x134/0x13c
[ 40.428000] [<80007940>] ret_from_kernel_thread+0x10/0x18
[ 40.433000]
[ 40.435000] no locks held by kmemleak/467.
[ 60.440000] INFO: task kmemleak:467 blocked for more than 20 seconds.
[ 60.446000] Not tainted 3.16.0-gfiber0-g8f44b1b-dirty #4
[ 60.452000] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[ 60.460000] kmemleak D 8070b79c 7104 467 2 0x00100000
[ 60.466000] Stack : ffffffff 80950000 80b13ec0 807122ec cf416050
ceaabe24 cf290a00 80b13ec0
8071a420 ffffffff 80950000 80085788 10008701 00000000
cff80cd0 cff80a80
81b1c900 10008701 fffc603e 80900000 ceaabe24 80b13ec0
80b13ec0 8071a420
ffffffff 80950000 ffdfffff 8070b79c 00000001 cfca1d8c
10008701 cff80f60
10008701 80b147f4 80b147f4 fffc603e 80b13ec0 80039698
cff80a80 ffffffff
...
[ 60.503000] Call Trace:
[ 60.506000] [<8070c204>] __schedule+0x4a4/0x8d4
[ 60.511000] [<8070b79c>] schedule_timeout+0x144/0x21c
[ 60.516000] [<8003a10c>] msleep+0x34/0x44
[ 60.520000] [<801495d4>] kmemleak_scan_thread+0xf0/0xf8
[ 60.525000] [<800538c0>] kthread+0x134/0x13c
[ 60.529000] [<80007940>] ret_from_kernel_thread+0x10/0x18
[ 60.535000]
[ 60.536000] no locks held by kmemleak/467.
After mounting /sys/kernel/debug, it appears that the scheduler just
dies. initramfs script was still going to run "strace mount -o ro -t
squashfs /dev/mmcblk0p19 /rootfs", but it never executes. Instead, we
can see that kmemleak_scan_thread() has become a hung task. And
obviously, the system never gets to a shell prompt.
Relevant kernel config is:
CONFIG_MIPS=y
CONFIG_SMP=y
CONFIG_NR_CPUS=2
CONFIG_HZ_1000=y
CONFIG_HZ=1000
CONFIG_PREEMPT_NONE=y
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ_COMMON=y
# CONFIG_HZ_PERIODIC is not set
CONFIG_NO_HZ_IDLE=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
...
CONFIG_DEBUG_KMEMLEAK=y
CONFIG_DEBUG_KMEMLEAK_EARLY_LOG_SIZE=500
CONFIG_LOCKUP_DETECTOR=y
CONFIG_DETECT_HUNG_TASK=y
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=20
CONFIG_DEBUG_RT_MUTEXES=y
CONFIG_DEBUG_SPINLOCK=y
CONFIG_DEBUG_MUTEXES=y
CONFIG_DEBUG_LOCK_ALLOC=y
CONFIG_PROVE_LOCKING=y
CONFIG_LOCKDEP=y
Workaround:
Interestingly, there is a workaround to avoid this hang. Once I turn
on preemption with CONFIG_PREEMPT=y, the issue goes away.
Can someone with scheduler expertise help me debug this further?
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