Configuring Linux Kernel to least size

lyf sci

Hi Experts,

I am new bee to the Linux in TI processor.

I need to strip down the Linux SDK to the core features alone like processor, memory drivers and USB. Rest of the drivers I need to disable in the compilation. I downloaded the Linux sdk for AM37x processor.

I just configured it using "make menuconfig". But I am not sure whether I had covered all the required sections. Is there any reference pointing each sub-system and its dependencies.

Also what will be the rough flash and RAM memory usage for the stripped down linux kernel with processor, RAM, I2C (PMIC), USB and flash memory drivers ?

over 9 years ago

0 Titusrathinaraj Stalin over 9 years ago

TI__Guru** 116100 points

Hi Iyf,

Please refer to the following very useful TI wikis.

http://processors.wiki.ti.com/index.php/Sitara_Linux_Training:_Boot_Time_Reduction

http://processors.wiki.ti.com/index.php/Sitara_Linux_Training

Please search for the linux training guides and you would find a lot of wikis & training guides at only www.ti.com and http://processors.wiki.ti.com/index.php/Main_Page

0 lyf sci over 9 years ago in reply to Titusrathinaraj Stalin

Genius 3720 points

Hi Titusrathinaraj,

I have went through the link. Its of great help. For power management its clear enough to do. My query is very specific regarding to the Linux core kernel configuration. Is there any pre-built or samples built similar to that ?

0 Titusrathinaraj Stalin over 9 years ago in reply to lyf sci

TI__Guru** 116100 points

Hi Iyf,

Is there any pre-built or samples built similar to that ?

What kind of board are you working ?

Is it a TI EVM board or your custom board ?

The pre-built kernel image is available only for the TI EVM boards and size could be ~2MB to ~3MB.

You have to change the kernel drivers configurations through "make menuconfig" as you said,

In custom/EVM board, If you don't want to work with sound/video/SPI/I2C/USB then you can disable the appropriate drivers through menuconfig.

Still if you are not clear or need support further, could you please elaborate a bit on your requirement.

0 lyf sci over 9 years ago in reply to Titusrathinaraj Stalin

Genius 3720 points

Hi Titusrathinaraj Stalin,

I was quite impressed with the application sample http://www.ti.com/lit/an/spraah2a/spraah2a.pdf

As a hobby thing, I would like to try it in beagle bone black to control few home appliances like lights,etc using CGI in web server from WLAN based browser interface.

Also what could be the bare minimal memory footprint of Linux kernel in terms of Flash and RAM memory usage ?

I don't need to use graphics, audio, video and other provisions in board. I was excited to tweak and learn with the best possible linux porting and almost negligible user space applications running on it.

Regards,

Lyf

0 Titusrathinaraj Stalin over 9 years ago in reply to lyf sci

TI__Guru** 116100 points

Hi Lyf,

Why do you want to use the less kernel size when you have more memory on your board (DDR3 and 4GB eMMC flash for storage) ?

That EVM board has less size of memory which uses NOR flash but beagle board using 4GB eMMC flash .

http://beagleboard.org/black

Is there any booting speed constraints (in seconds) ?

If yes, please refer the above link.

As a hobby thing, I would like to try it in beagle bone black to control few home appliances like lights,etc using CGI in web server from WLAN based browser interface.

I hope it is very easy for beagle board (TI's AM335x such a good powerful processor).

0 lyf sci over 9 years ago in reply to Titusrathinaraj Stalin

Genius 3720 points

Hi Titusrathinaraj Stalin,

thanks for the link.

Later I want to move it to the standalone PCB design. Also I would like to tweak and fail and learn the kernel porting. So I set the memory footprint as the constraint and using it as the efficient model.

Regards,

Lyf

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Configuring Linux Kernel to least size