Messages in this thread |  | | Date | Tue, 4 Sep 2001 13:13:50 -0400 | Subject | Re: page_launder() on 2.4.9/10 issue | From | Jan Harkes <> |
| |
On Tue, Sep 04, 2001 at 01:27:50PM -0300, Rik van Riel wrote: > 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.
Yes, I can see that using reverse mappings would be a way of correcting the aging if you call page_age_up from try_to_swap_out, in which case there probably needs to be a page_age_down on virtual mappings as well to correctly balance things.
> It seems the balancing FreeBSD does (up aging +3, down > aging -1, inactive list in LRU order as extra stage) is
One other observation, we should add anonymously allocated memory to the active-list as soon as they are allocated in do_nopage. At the moment a large part of memory is not aged at all until we start swapping things out.
Jan
- 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/
|  |