lkml.org 
[lkml]   [2009]   [May]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic
Michael S. Zick, le Fri 22 May 2009 15:32:41 -0500, a écrit :
> On Fri May 22 2009, Samuel Thibault wrote:
> > Michael S. Zick, le Fri 22 May 2009 14:53:39 -0500, a écrit :
> > > Ref: http://developer.intel.com/Assets/PDF/manual/253666.pdf
> > > Manual page: 3-590 PDF page: 638
> > > Summary: Processors prior to P-4 can take an interrupt between
> > > the read cycle and the write cycle. Which is why opcode 0xF0 exists.
> >
> > Where do you see page 638/639 talking about interrupts? It talks about
> > multi-processor machines.
>
> No - it talks about "exclusive memory access"

Right, that's still not interrupts.

> - You got bus master DMA in your test machine?

That's not related to the LOCK_PREFIX concern, which is about the
processor only, not interaction with other devices.

> Look people, I just reported what I found from testing -

What did you test, precisely?

Samuel
--
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: 2009-05-22 22:45    [from the cache]
©2003-2011 Jasper Spaans