What is BLK_DEV_RAM_SIZE set to in the kernel?

Michael Donahoe
Senior Developer
Systematic Consulting Group
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michael.dona...@systematicgroup.com<mailto:michael.dona...@systematicgroup.com>


________________________________
From: meta-freescale@lists.yoctoproject.org 
<meta-freescale@lists.yoctoproject.org> on behalf of Yusuf 
<yusufalti1...@gmail.com>
Sent: Tuesday, January 14, 2020 11:31 PM
To: u-b...@lists.denx.de <u-b...@lists.denx.de>; 
meta-freescale@lists.yoctoproject.org <meta-freescale@lists.yoctoproject.org>
Subject: [meta-freescale] Ramdisk booting: EXT4-fs (ram0): bad geometry error.


Hello

With t1042d4rdb-64b and yocto 2.7 ( 
https://source.codeaurora.org/external/qoriq/qoriq-components/yocto-sdk/tree/readme?h=warrior
 ) I am having bad geometry error while booting and U-boot is freezing. I 
declared "setenv intrd_high=0xffffffff" to use large rootfs but I am unable to 
reach root login. Can anyone help me about this situation ?

Full error console log is here:

RAMDISK: gzip image found at block 0
RAMDISK: incomplete write (17195 != 32768)
write error
EXT4-fs (ram0): bad geometry: block count 435752 exceeds size of device (131072 
blocks)
VFS: Mounted root (ext2 filesystem) on device 1:0.
devtmpfs: mounted
Freeing unused kernel memory: 536K
This architecture does not have kernel memory protection.
Run /sbin/init as init process
attempt to access beyond end of device
ram0: rw=0, want=450632, limit=262144
Buffer I/O error on dev ram0, logical block 225315, async page read
attempt to access beyond end of device
ram0: rw=0, want=454376, limit=262144
Buffer I/O error on dev ram0, logical block 227187, async page read
attempt to access beyond end of device
ram0: rw=0, want=458082, limit=262144
Buffer I/O error on dev ram0, logical block 229040, async page read
attempt to access beyond end of device
ram0: rw=0, want=458084, limit=262144
Buffer I/O error on dev ram0, logical block 229041, async page read
Run /etc/init as init process
attempt to access beyond end of device
ram0: rw=0, want=456378, limit=262144
Buffer I/O error on dev ram0, logical block 228188, async page read
attempt to access beyond end of device
ram0: rw=0, want=457688, limit=262144
Buffer I/O error on dev ram0, logical block 228843, async page read
attempt to access beyond end of device
ram0: rw=0, want=458086, limit=262144
Buffer I/O error on dev ram0, logical block 229042, async page read
Run /bin/init as init process
attempt to access beyond end of device
ram0: rw=0, want=457942, limit=262144
Buffer I/O error on dev ram0, logical block 228970, async page read
Run /bin/sh as init process
attempt to access beyond end of device
ram0: rw=0, want=457942, limit=262144
Buffer I/O error on dev ram0, logical block 228970, async page read
Kernel panic - not syncing: No working init found.  Try passing init= option to 
kernel. See Linux Documentation/admin.
CPU: 3 PID: 1 Comm: swapper/0 Not tainted 4.19.26+gc0c2141 #1
Call Trace:
[c0000001f3107c70] [c000000000a69bf4] .dump_stack+0xa8/0xec (unreliable)
[c0000001f3107d00] [c00000000004b580] .panic+0x12c/0x2e8
[c0000001f3107db0] [c000000000002464] .kernel_init+0x10c/0x128
[c0000001f3107e30] [c0000000000009f4] .ret_from_kernel_thread+0x58/0x64
Rebooting in 180 seconds..

printenv output:

baudrate=115200
bdev=sda3
bootargs=root=/dev/ram rw console=ttyS0,115200
bootcmd=setenv bootargs root=/dev/ram rw console=$consoledev,$baudrate 
$othbootargs;bootm e8020000 e9300000 e8800000
bootdelay=3
bootfile=uImage
c=ffe
consoledev=ttyS0
eth1addr=00:04:9F:05:B7:B1
eth2addr=00:04:9F:05:B7:B2
eth3addr=00:04:9F:05:B7:B3
eth4addr=00:04:9F:05:B7:B4
eth5addr=00:04:9f:8e:7b:b4
ethact=FM1@DTSEC1
ethaddr=00:04:9F:05:B7:B0
ethprime=e1000#0
fdtaddr=2000000
fdtfile=uImage-t1042d4rdb.dtb
fileaddr=2000000
filesize=9a83
fman_ucode=eff00000
gatewayip=192.168.10.4
hvboot=setenv bootargs console=$consoledev,$baudrate 
config-addr=0xfe8900000;bootm 0xfe8700000 - 0xfe8800000
hwconfig=fsl_ddr:bank_intlv=cs0_cs1
initrd_high=0xffffffff
ipaddr=192.168.10.99
loadaddr=1000000
netdev=eth0
netmask=255.255.255.0
nfsboot=setenv bootargs root=/dev/nfs rw nfsroot=$serverip:$rootpath 
ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostnar
nohvboot=tftp 1000000 $dir/$bootfile;tftp 5000000 $dir/$ramdiskfile;tftp 
2000000 $dir/$fdtfile;setenv bootargs root=/;
othbootargs=ramdisk_size=1000000
ramboot=setenv bootargs root=/dev/ram rw console=$consoledev,$baudrate 
$othbootargs;tftp $ramdiskaddr $ramdiskfile;tfr
ramdisk_size=41943040
ramdiskaddr=5000000
ramdiskfile=fsl-image-core-t1042d4rdb.ext2.gz.u-boot
rootpath=/opt/nfsroot
serverip=192.168.10.50
tftpflash=tftpboot $loadaddr $uboot && protect off $ubootaddr +$filesize && 
erase $ubootaddr +$filesize && cp.b $loade
uboot=u-boot.bin
ubootaddr=0xeff40000

Environment size: 1871/8188 bytes

and the commands I used:

tftp 10000000 uImage--4.19-r0-t1042d4rdb-64b-20200106043637.bin
tftp 1f000000 t1042d4rdb--4.19-r0-t1042d4rdb-64b-20200106043637.dtb
tftp 20000000 rootfs.ext2.gz.u-boot
bootm 10000000 20000000 1f000000
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