Does Tegra_Linux_Sample-Root-Filesystem_Rxx.y.z_aarch64.tbz2 have Nvidia's own change for Tegra or Jetson Nano?

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

See the question at topic.
If we create our own rootfs from generic Ubuntu base image, eg. “ubuntu-base-18.04.5-base-arm64.tar.gz”, is anything of Tegra or Jetson Nano affected or missing?

I compared Nvidia released Tegra_Linux_Sample-Root-Filesystem of R32.3.1, R32.4.3 and R32.4.4, there are many files different among version. Why sample rootfs has many differences for different version of L4T/JetPack SDK?

Is there a document describe how Nvidia generate Tegra_Linux_Sample-Root-Filesystem package?

3

hello shidf10,

there’re lots binaries included in the sample root file system, so that’s depends-on release versions.
thanks

4

thanks but is there any specific Nvidia change for Tegra or Jetson?

5

hello shidf10,

may I know what’s your actual use-case?

6

We want to create our own rootfs that will be much smaller without installing anything we don’t use.

7

hello shidf10,

please also refer to developer guide, you may check Root Filesystem Configuration session for more details.
thanks

8

hello shidf10,

here’s also one similar topic you may also check for reference, Creating a custom rootfs.
thanks

9

Thanks, we know how to create our rootfs. The question in op is “If we create our own rootfs from generic Ubuntu base image, eg. “ubuntu-base-18.04.5-base-arm64.tar.gz”, is anything of Tegra or Jetson Nano affected or missing?”,
or as subject of this topic: “Does Tegra_Linux_Sample-Root-Filesystem_Rxx.y.z_aarch64.tbz2 have Nvidia’s own change for Tegra or Jetson Nano?”

10

hello shidf10,

yes.
there’re several Tegra specific binaries, for example, you may looking into the pre-built libraries under /usr/lib/aarch64-linux-gnu/.

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11

hi Jerry,

is /usr/lib/aarch64-linux-gnu/ the only place that we need to check? any other config file in Tegra_Linux_Sample-Root-Filesystem_Rxx.y.z_aarch64.tbz2 we need pay attention to ?

12

hello terry8uwg2,

there’re several library besides /usr/lib/aarch64-linux-gnu/, for example, /usr/lib/xorg/modules/drivers/nvidia_drv.so.
suggest you based-on Tegra_Linux_Sample-Root-Filesystem to have your customization.
thanks

1 Like
14

Hi Jerry,

can you share the script how Nvidia make the rootfs in each jetpack release ? as we noticed every jetpack release the rootfs system are different . as we are making our own rootfs system for prodution we are worried wihtout understanding how jetpack rootfs is made we might miss importand feature.

15

hello terry8uwg2,

according to developer guide, Setting Up Your File System.
you may access L4T Sample Root File System for each L4T release from the download center for reference.
it is script file, apply_binaries.sh to copy the NVIDIA user space libraries into the target file system.
thanks