Re: [PATCH] Document Linux's memory barriers [try #2]

David Howells
2006-03-08T19:31:54Z

Linus Torvalds <torvalds@osdl.org> wrote:

> Actually, since the different NUMA things may have different paths to the
> PCI thing, I don't think even the mmiowb() will really help. It has
> nothing to serialize _with_.

On NUMA PowerPC, should mmiowb() be a SYNC or an EIEIO instruction then? Those
do inter-component synchronisation.

David