Subject: Re: ancillary data alignment and binary backward compatibility
To: Chris G. Demetriou <>
From: Jun-ichiro itojun Hagino <>
List: tech-net
Date: 03/08/2000 10:22:38
>Why is this a good thing to have a sysctl for?
>* it's not gonna change on a given MACHINE_ARCH.  (if it does, well,
>something _else_ is seriously wrong.)
>* it's easier, nicer, faster code is produced if you do 
>masks/shifts/ands etc. with constants known at compile time than if
>you do them all as needed at run-time with variables.

	ALIGNBYTES can be different between the kernel and the userland,
	if you run sparc32 binary on sparc64 kernel.
	(and bunch of emails near this one)