lkml.org 
[lkml]   [2006]   [Sep]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: Opinion on ordering of writel vs. stores to RAM
Date
On Saturday, September 09, 2006 3:08 am, David Miller wrote:
> From: Jeff Garzik <jeff@garzik.org>
> Date: Sat, 09 Sep 2006 05:55:19 -0400
>
> > As (I think) BenH mentioned in another email, the normal way Linux
> > handles these interfaces is for the primary API (readX, writeX) to
> > be strongly ordered, strongly coherent, etc. And then there is a
> > relaxed version without barriers and syncs, for the smart guys who
> > know what they're doing
>
> Indeed, I think that is the way to handle this.

Well why didn't you guys mention this when mmiowb() went in?

I agree that having a relaxed PIO ordering version of writeX makes sense
(jejb convinced me of this on irc the other day). But what to name it?
We already have readX_relaxed, but that's for PIO vs. DMA ordering, not
PIO vs. PIO. To distinguish from that case maybe writeX_weak or
writeX_nobarrier would make sense?

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

\
 
 \ /
  Last update: 2006-09-10 19:21    [W:0.067 / U:0.224 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site