Re: [PATCH] ARM: multi_v7_defconfig: make USB_DWC3 as a module instead of built-in

[Arnd Bergmann]

On Tue, Apr 4, 2023, at 14:59, Roger Quadros wrote:
> On 04/04/2023 15:14, Arnd Bergmann wrote:
>> On Tue, Apr 4, 2023, at 13:46, Roger Quadros wrote:
>> That seems really high, so I had a look at what's going on.
>
> It was based on the configuration we are using at TI.
>
> (as built-in)
>
> $ size vmlinux
>    text	   data	    bss	    dec	    hex	filename
> 14616949	5285870	 491776	20394595	1373263	vmlinux
> $ ls -l vmlinux
> -rwxrwxr-x 1 roger roger 120866544 Apr  4 15:54 vmlinux
>
> (as module)
>
> $ size vmlinux
>    text	   data	    bss	    dec	    hex	filename
> 14550571	5258106	 491776	20300453	135c2a5	vmlinux
> $ ls -l vmlinux
> -rwxrwxr-x 1 roger roger 120324528 Apr  4 15:52 vmlinux
>
>
> $ diff built-in-config module-config
> 5547c5547
> < CONFIG_USB_XHCI_PLATFORM=y
> ---
>> CONFIG_USB_XHCI_PLATFORM=m
> 5614c5614
> < CONFIG_USB_DWC3=y
> ---
>> CONFIG_USB_DWC3=m

Ok, so the size difference here is only 94KB, presumably
because have the non-TI variants as well as debugfs and/or
gadget mode disabled. For the file size, my guess is that
you have CONFIG_DEBUG_INFO enabled in your config, which
drastically increases the size of the vmlinux file, but
not the in-memory size, or the size of the stripped and
compressed zImage.

      Arnd