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 8:09 am, Alan Cox wrote:
> Ar Sad, 2006-09-09 am 17:23 +1000, ysgrifennodd Benjamin
Herrenschmidt:
> > The problem is that very few people have any clear idea of what
> > mmiowb is :) In fact, what you described is not the definition of
> > mmiowb according to Jesse
>
> Some of us talked a little about this at Linux Kongress and one
> suggestion so people did understand it was
>
> spin_lock_io();
> spin_unlock_io();
>
> so that it can be expressed not as a weird barrier op but as part of
> the locking.

That's what IRIX had. It would let us get rid of mmiowb and avoid doing
a full sync in writeX, so may be the best option.

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 19:23    [W:0.145 / U:0.472 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site