buildroot - 使用更大的 initramfs 对 populate_rootfs 感到恐慌

Question

我正在使用带有 initramfs 的 buildroot。它适用于小于 14M 的 uImage。

但是当我添加包并变大时，就会发生这种内核恐慌。

Kernel command line: noinitrd ramdisk_size=30720 console=ttyS0,115200n8 oops=panic panic=10 rdinit=/sbin/init mem=64M ubi.mtd=2 mtdparts=nand0:0x200000@0x0(u-boot),0x1E00000@l
PID hash table entries: 256 (order: -2, 1024 bytes)
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 44656K/65536K available (3734K kernel code, 277K rwdata, 1212K rodata, 14780K init, 216K bss, 20880K reserved, 0K cma-reserved)
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
    vmalloc : 0xc4800000 - 0xff800000   ( 944 MB)
    lowmem  : 0xc0000000 - 0xc4000000   (  64 MB)
    modules : 0xbf000000 - 0xc0000000   (  16 MB)
      .text : 0xc0008000 - 0xc04dce24   (4948 kB)
      .init : 0xc04dd000 - 0xc134c000   (14780 kB)
      .data : 0xc134c000 - 0xc13915a0   ( 278 kB)
       .bss : 0xc13915a0 - 0xc13c77d0   ( 217 kB)
----- snip -----
NET: Registered protocol family 1
Kernel panic - not syncing: write error
CPU: 0 PID: 1 Comm: swapper Not tainted 4.4.207 #2
Hardware name: NUC980
Backtrace:
[<c0012ec0>] (dump_backtrace) from [<c00130ac>] (show_stack+0x18/0x1c)
 r6:c392a440 r5:c046f548 r4:c047848c r3:00000000
[<c0013094>] (show_stack) from [<c017e298>] (dump_stack+0x20/0x28)
[<c017e278>] (dump_stack) from [<c0075f28>] (panic+0xb0/0x240)
[<c0075e7c>] (panic) from [<c04dfed4>] (populate_rootfs+0x38/0x250)
 r3:00000001 r2:c3f6e050 r1:c046f548 r0:c047848c
 r7:c04fb828
[<c04dfe9c>] (populate_rootfs) from [<c00095b8>] (do_one_initcall+0x88/0x1ec)
 r10:00000076 r9:00000000 r8:c04dfe9c r7:c04fb828 r6:c392a440 r5:c134fa60
 r4:c134fa60
[<c0009530>] (do_one_initcall) from [<c04dde18>] (kernel_init_freeable+0x108/0x1cc)
 r10:00000076 r9:c04fb838 r8:c0501384 r7:c04fb828 r6:c13915a0 r5:c13915a0
 r4:00000005
[<c04ddd10>] (kernel_init_freeable) from [<c03a7cd0>] (kernel_init+0x10/0xf4)
 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c03a7cc0
 r4:00000000
[<c03a7cc0>] (kernel_init) from [<c000fdf8>] (ret_from_fork+0x14/0x3c)
 r4:00000000 r3:ffffffff

这是使用的 env.txt

baudrate=115200
bootdelay=1
stderr=serial
stdin=serial
stdout=serial
setspi=sf probe 0 30000000
loadkernel=sf read 0x7fc0 0x200000 0x1E00000
mtdparts=mtdparts=nand0:0x200000@0x0(u-boot),0x1E00000@0x200000(kernel),-(user)
bootargs=noinitrd ramdisk_size=30720 console=ttyS0,115200n8 oops=panic panic=10 rdinit=/sbin/init mem=64M ubi.mtd=2 mtdparts=nand0:0x200000@0x0(u-boot),0x1E00000@0x200000(kernel),-(user) ignore_loglevel
bootcmd=run setspi;run loadkernel;bootm 0x7fc0

uBoot 报告这些 mtdparts

=> mtdparts

device nand0 <nand0>, # parts = 3
 #: name                size            offset          mask_flags
 0: u-boot              0x00200000      0x00000000      0
 1: kernel              0x01e00000      0x00200000      0
 2: user                0x06000000      0x02000000      0

active partition: nand0,0 - (u-boot) 0x00200000 @ 0x00000000

NAND布局

0x0000000 - u-boot-spl.bin  .5M
0x0080000 - env.txt         .5M
0x0100000 - u-boot.bin      1M
0x0200000 - uImage         30M
0x2000000 - application    96M
0x8000000

/proc/iomem 来自工作/较小的 uImage

# cat /proc/iomem
00000000-03ffffff : System RAM
  00008000-004d4df3 : Kernel code
  00eee000-00f67a9b : Kernel data
b0004000-b0004fff : nuc980-gpio.0
b0008000-b0008fff : nuc980-dma
b0009000-b0009fff : nuc980-dma
b0012000-b0012fff : nuc980-emac0
b0015000-b0015fff : nuc980-ehci
  b0015000-b0015fff : ehci_hcd
b0017000-b0017fff : nuc980-ohci.0
  b0017000-b0017fff : ohci_hcd
b0018000-b0018fff : nuc980-sdh
  b0018000-b0018fff : nuc980-sdh
b001c000-b001ffff : nuc980-crypto
  b001c000-b001ffff : nuc980-crypto
b0043000-b0043fff : nuc980-nadc
b0060000-b0060fff : nuc980-qspi0.0
  b0060000-b0060fff : nuc980-qspi0
b0061000-b0061fff : nuc980-spi0.0
  b0061000-b0061fff : nuc980-spi0
b0090000-b0090fff : nuc980-sc.0
  b0090000-b0090fff : nuc980-sc
b0091000-b0091fff : nuc980-sc.1
  b0091000-b0091fff : nuc980-sc

15M 构建 BR2_LINUX_KERNEL_LZMA=y, BR2_TARGET_ROOTFS_CPIO_LZMA=y, CONFIG_KERNEL_LZMA=y, CONFIG_RD_LZMA=y, CONFIG_DECOMPRESS_LZMA=y

     2871 Oct  7 22:58 u-boot-spl.bin
   351360 Oct  7 22:58 u-boot.bin
 25330176 Oct  8 13:08 rootfs.cpio
  5420787 Oct  8 13:08 rootfs.cpio.lzma
 12954944 Oct  8 13:09 uImage
 16748928 Oct  8 13:09 Image

在ARM 上 initramfs 的大小限制？提到没有大小限制。

我尝试了几件事，例如在 linux 中增加 CONFIG_BLK_DEV_RAM_SIZE 并在 uboot 中增加 CONFIG_SYS_BOOTM_LEN，但这没有帮助。

我正在使用的 BSP 基于 buildroot 2016.11.1 如果需要更多信息/上下文，请告诉我。TIA

内核配置 Buildroot 配置

标签： buildrootinitramfs