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

[David Howells]

Linus Torvalds <torvalds@xxxxxxxx> 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
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