Re: [Xen-devel] RFC: 32 bits as smallest atomic size.

[Keir F. <Kei...@cl...>]

On 26 Mar 2005, at 14:13, Jimi Xenidis wrote:

>  KF> We always naturally align fields, even in packed structs. The 
> compiler
>  KF> doesn't do it for us, but we check it manually.
>
> hmm, is it padding you are trying to avoid?
> Perhaps not using packed and adding the gcc option '-Wpadded' which
> will automagically catch the offenders for you might be more
> appropriate?
>
> Depending on manually checking can result in performance and
> correctness issues that are difficult to track.

Mostly it's used for structs that are part of the public Xen interface. 
I don't want different compilers packing fields in different ways.

  -- Keir