Messages in this thread |  | | Date | Tue, 4 Sep 2001 13:27:50 -0300 (BRST) | From | Rik van Riel <> | Subject | Re: page_launder() on 2.4.9/10 issue |
| |
On Tue, 4 Sep 2001, Jan Harkes wrote:
> NO, please don't add another list to fix the symptoms of bad page aging. > > One of the graduate students here at CMU has been looking at the 2.4 VM, > trying to predict the size of the app that can possibly be loaded > without causing the system to start trashing.
[snip results]
> Aging is broken. Horribly. As a result, the inactive list is filled with > pages that are not necessarily inactive.
I've been working on a CPU and memory efficient reverse mapping patch for Linux, one which will allow us to do a bunch of optimisations for later on (infrastructure) and has as its short-term benefit the potential for better page aging.
It seems the balancing FreeBSD does (up aging +3, down aging -1, inactive list in LRU order as extra stage) is working nicely on my laptop now, but I don't think I'll be releasing that as part of the patch ...
http://www.surriel.com/patches/2.4/2.4.8-ac12-pmap3
regards,
Rik -- IA64: a worthy successor to i860.
http://www.surriel.com/ http://distro.conectiva.com/
Send all your spam to aardvark@nl.linux.org (spam digging piggy)
- 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/
|  |