Am Freitag, 18. Juni 2004 23:41 schrieb Alan Stern:

quoted

barriers. Actually, it's worse, you need a full mb() to order them,
which is why lately, we made ppc64 writeX() do full sync's ... that sucks
but it's near to impossible to get an abstract IO API that would cover
our needs here and still make other archs happy it seems...

I recently changed a few mb() calls to wmb(), because they only protected
data the CPU was writing to be read by the device.  Do you think changing
all the wmb()'s back to mb()'s would make a difference?

Are these issues documented somewhere?

	Regards
		Oliver

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