From: Claudio Jeker <cjeker@diehard.n-r-g.com>
Subject: Re: alpha: bump MAXDSIZ
To: Martijn van Duren <openbsd+tech@list.imperialat.at>
Cc: tech@openbsd.org
Date: Mon, 19 Oct 2026 09:38:23 +0200

On Mon, Oct 19, 2026 at 09:26:39AM +0200, Martijn van Duren wrote:
> Hello tech@,
> 
> Playing around with my alpha systems again I managed to build gcc-16 on
> there. During linking I found memory usage of at least 1340MB, which is
> larger than the curren MAXDSIZ. Diff below seems like a reasonable value
> to me.
> 
> OK?
> 
> martijn@
> 
> diff /usr/src
> path + /usr/src
> commit - fa70b583ed3ab626378c9fb03bb92e8565fefa61
> blob - 2f095fcc79fbb92042ab91653c6e9c26d813fbc0
> file + sys/arch/alpha/include/vmparam.h
> --- sys/arch/alpha/include/vmparam.h
> +++ sys/arch/alpha/include/vmparam.h
> @@ -58,7 +58,7 @@
>  #define	DFLDSIZ		(128*1024*1024)		/* initial data size */
>  #endif
>  #ifndef MAXDSIZ
> -#define	MAXDSIZ		(1*1024*1024*1024)	/* max data size */
> +#define	MAXDSIZ		((paddr_t)2*1024*1024*1024)	/* max data size */
>  #endif
>  #ifndef BRKSIZ
>  #define	BRKSIZ		MAXDSIZ			/* heap gap size */
 
Should this be more? Now I guess it is hard to get alphas with a lot of
memory but it should be possible to have more then 2GB of it.

Also there is some inconsitency with the form for MAXDSIZ.
Some archs use UL on the first number which I personally prefer over the
(paddr_t) typecast.

-- 
:wq Claudio