lkml.org 
[lkml]   [2004]   [Feb]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Active Memory Defragmentation: Our implementation & problems

--- Dave Hansen <haveblue@us.ibm.com> wrote:
> On Wed, 2004-02-04 at 10:54, Alok Mooley wrote:
> > --- Dave Hansen <haveblue@us.ibm.com> wrote:
> Depending on the quantity of work that you're trying
> to do at once, this
> might be unavoidable.
> I know it's a difficult thing to think about, but I
> still don't
> understand the precise cases that you're concerned
> about. Page faults
> to me seem like the least of your problems. A
> bigger issue would be if
> the page is written to by userspace after you copy,
> but before you
> install the new pte. Did I miss the code in your
> patch that invalidated
> the old tlb entries?

This is a non issue for us right now, since we update
the ptes in a lock, & so no one can access it before
it is completely updated. Yes, we invalidate the old
tlb entries as well as the cache entries as reqd. on
some other architectures.

-Alok


__________________________________
Do you Yahoo!?
Yahoo! Finance: Get your refund fast by filing online.
http://taxes.yahoo.com/filing.html
-
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 14:00    [from the cache]
©2003-2011 Jasper Spaans