Re: [PATCH] powerpc64: Increase SIGSTKSZ and MINSIGSTKSZ

[Florian Weimer <fweimer@redhat.com>]

* Rajalakshmi Srinivasaraghavan via Libc-alpha:

> This patch increases the value of SIGSTKSZ and MINSIGSTKSZ
> for powerpc64 similar to the kernel commit
> 2f82ec19757f58549467db568c56e7dfff8af283 to allow
> further expansion of the signal stack frame size.
> ---
>  sysdeps/unix/sysv/linux/powerpc/bits/sigstack.h | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/sigstack.h b/sysdeps/unix/sysv/linux/powerpc/bits/sigstack.h
> index abc87cd7a6..4bff1fe1e7 100644
> --- a/sysdeps/unix/sysv/linux/powerpc/bits/sigstack.h
> +++ b/sysdeps/unix/sysv/linux/powerpc/bits/sigstack.h
> @@ -23,10 +23,15 @@
>  # error "Never include this file directly.  Use <signal.h> instead"
>  #endif
>  
> +#ifdef __powerpc64__
> +#define MINSIGSTKSZ	8192
> +#define SIGSTKSZ	32768
> +#else
>  /* Minimum stack size for a signal handler.  */
>  #define MINSIGSTKSZ	4096
>  
>  /* System default stack size.  */
>  #define SIGSTKSZ	16384
> +#endif

This is technically an ABI change, but if you think this is the right
forward, you can certainly make that change.  It's not the path some
other architectures have taken when they faced similar problems, so I
don't think we have much experience in this area.

Should we backport this to older releases (or downstream)?

Thanks,
Florian