lkml.org 
[lkml]   [2002]   [Jun]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: PCI DMA to small buffers on cache-incoherent arch
From
   From: Paul Mackerras <paulus@samba.org>
Date: Sun, 9 Jun 2002 19:51:58 +1000 (EST)

This is the problem scenario. Suppose we are doing DMA to a buffer B
and also independently accessing a variable X which is not part of B.
Suppose that X and the beginning of B are both in cache line C.

I see what the problem is. Hmmm...

I'm trying to specify this such that knowledge of cachelines and
whatnot don't escape the arch specific code, ho hum... Looks like
that isn't possible.
-
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: 2005-03-22 13:26    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site