From: Nick Piggin <piggin@cyberone.com.au>
To: linux-kernel <linux-kernel@vger.kernel.org>,
Linux Memory Management <linux-mm@kvack.org>
Subject: Re: [RFC][PATCH 4/4] vm-mapped-x-active-lists
Date: Tue, 09 Mar 2004 16:39:00 +1100 [thread overview]
Message-ID: <404D5874.2060108@cyberone.com.au> (raw)
In-Reply-To: <404D5784.9080004@cyberone.com.au>
Nick Piggin wrote:
>
>@@ -714,14 +737,27 @@ shrink_zone(struct zone *zone, int max_s
> * just to make sure that the kernel will slowly sift through the
> * active list.
> */
>- ratio = (unsigned long)SWAP_CLUSTER_MAX * zone->nr_active /
>- ((zone->nr_inactive | 1) * 2);
>+ nr_active = zone->nr_active_mapped + zone->nr_active_unmapped;
>+ ratio = (unsigned long)SWAP_CLUSTER_MAX * nr_active /
>+ (zone->nr_inactive * 2 + 1);
>+ mapped_ratio = (unsigned long long)ratio * nr_active;
>+ do_div(mapped_ratio, zone->nr_active_mapped+1);
>
Just for information, this is where you would balance mapped vs unmapped
pages: do_div(mapped_ratio, 16); /* mapped pages are worth 16 times
more */
>+
>+ ratio = ratio - mapped_ratio;
>+ atomic_add(ratio+1, &zone->nr_scan_active_unmapped);
>+ count = atomic_read(&zone->nr_scan_active_unmapped);
>+ if (count >= SWAP_CLUSTER_MAX) {
>+ atomic_set(&zone->nr_scan_active_unmapped, 0);
>+ shrink_active_list(zone, &zone->active_unmapped_list,
>+ &zone->nr_active_unmapped, count, ps);
>+ }
>
>- atomic_add(ratio+1, &zone->nr_scan_active);
>- count = atomic_read(&zone->nr_scan_active);
>+ atomic_add(mapped_ratio+1, &zone->nr_scan_active_mapped);
>+ count = atomic_read(&zone->nr_scan_active_mapped);
> if (count >= SWAP_CLUSTER_MAX) {
>- atomic_set(&zone->nr_scan_active, 0);
>- shrink_active_list(zone, &zone->active_list, count, ps);
>+ atomic_set(&zone->nr_scan_active_mapped, 0);
>+ shrink_active_list(zone, &zone->active_mapped_list,
>+ &zone->nr_active_mapped, count, ps);
> }
>
> atomic_add(max_scan, &zone->nr_scan_inactive);
>
>
>
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next prev parent reply other threads:[~2004-03-09 5:39 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-09 5:32 [RFC][PATCH 0/4] VM split active lists Nick Piggin
2004-03-09 5:33 ` [RFC][PATCH 1/4] vm-lrutopage-cleanup Nick Piggin
2004-03-09 5:33 ` [RFC][PATCH 2/4] vm-nofixed-active-list Nick Piggin
2004-03-09 5:34 ` [RFC][PATCH 3/4] vm-no-reclaim_mapped Nick Piggin
2004-03-09 5:35 ` [RFC][PATCH 4/4] vm-mapped-x-active-lists Nick Piggin
2004-03-09 5:39 ` Nick Piggin [this message]
2004-03-09 5:47 ` Mike Fedyk
2004-03-09 6:06 ` Nick Piggin
2004-03-09 7:02 ` William Lee Irwin III
2004-03-09 7:23 ` Nick Piggin
2004-03-09 7:37 ` William Lee Irwin III
2004-03-09 9:24 ` William Lee Irwin III
2004-03-09 15:26 ` Marc-Christian Petersen
2004-03-09 15:42 ` Nikita Danilov
2004-03-10 2:49 ` Nick Piggin
2004-03-10 5:10 ` [RFC][PATCH 0/4] VM split active lists Nick Piggin
2004-03-12 9:58 ` Hans Reiser
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