Re: [PATCH] I/O space write barrier

[Jesse Barnes]

On Monday, October 04, 2004 6:22 pm, Benjamin Herrenschmidt wrote:
> On Tue, 2004-10-05 at 10:32, Albert Cahalan wrote:
> > Ideally, it would be eieio, and the eieio in each
> > of the IO operations would be removed. Finding and
> > fixing all the drivers that break looks impossible
> > though; most driver developers will be on x86 boxes.
>
> I don't agree. IO operations shouldn't be relaxed by
> default. That's really asking too much of driver writers

I agree, it's hard to get right, especially when you've got a large base of 
drivers with hard to find assumptions about ordering.

What about mmiowb()?  Should it be eieio?  I don't want to post another patch 
if I don't have to...

Thanks,
Jesse
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/