[issue report] ARM: compile error of frame size

[Arnd Bergmann]

On Wed, Oct 15, 2025, at 12:07, Geert Uytterhoeven wrote:
> On Tue, 14 Oct 2025 at 18:53, Liam R. Howlett <Liam.Howlett at oracle.com> wrote:

>> It is odd that this only shows up in certain cases though.  Is there a
>> particular config option that is needed to cause the size to grow beyond
>> 1024?
>
> And of course there is: I still had a few 64-bit .configs that were
> derived from older 32-bit .configs, and thus still had
> CONFIG_FRAME_WARN=1024 :-(
> Changing them to match the recommended default fixed the issue:
>
>     config FRAME_WARN
>             int "Warn for stack frames larger than"
>             ...
>             default 1024 if !64BIT
>             default 2048 if 64BIT
>
> Sorry for the noise...

I have a series that reduces the default warning limit for 64-bit,
but adds some slack for certain options such as KASAN that
are known to cause larger stacks throughout.

MIPS does have larger stack usage than most other architectures
here, and I do account for that with an architecture specific
base value as well, but in order to catch actual bugs in newly
written code, this has to be as small as possible.

What is the stack usage you observe in your configuration?

      Arnd