lkml.org 
[lkml]   [2002]   [Mar]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [RFC] Arch option to touch newly allocated pages
Date
From
> Yeah, MADV_DONTNEED looks right.  UML and Linux/s390 (assuming VM has the
> equivalent of MADV_DONTNEED) would need a hook in free_pages to make that
> happen.

VM allows you to give it back a page and if you use it again you get a
clean copy. What it seems to lack is the more ideal "here have this page
and if I reuse it trap if you did throw it out" semantic.

> > That BTW is an issue for more than UML - it has a bearing on running
> > lots of Linux instances on any supervisor/virtualising system like S/390
>
> On a side note, the "unused memory is wasted memory" behavior that UML and
> Linux/s390 inherit is also less than optimal for the host.

Yes. I believe IBM folks are studying that
-
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 13:24    [W:0.136 / U:0.240 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site