Re: [PATCH v8 2/6] x86/signal: Introduce helpers to get the maximum signal frame size

[Borislav Petkov]

On Wed, Apr 21, 2021 at 09:48:52PM -0700, Chang S. Bae wrote:
> +void __init init_sigframe_size(void)
> +{
> +	max_frame_size = MAX_FRAME_SIGINFO_UCTXT_SIZE + MAX_FRAME_PADDING;
> +
> +	max_frame_size += fpu__get_fpstate_size() + MAX_XSAVE_PADDING;
> +
> +	/* Userspace expects an aligned size. */
> +	max_frame_size = round_up(max_frame_size, FRAME_ALIGNMENT);

I guess we want

	pr_info("max sigframe size: %lu\n", max_frame_size);

here so that we can keep an eye on how much this becomes, in practice.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette