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| author | Christoph Lameter | 2006-02-12 02:55:53 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2006-02-12 06:41:11 +0100 |
| commit | 80e4342601abfafacb5f20571e40b56d73d10819 (patch) | |
| tree | c03c988860aa8b6a1cc24ba8adff3778c1705928 /mm/vmscan.c | |
| parent | [PATCH] select: fix returned timeval (diff) | |
| download | kernel-qcow2-linux-80e4342601abfafacb5f20571e40b56d73d10819.tar.gz kernel-qcow2-linux-80e4342601abfafacb5f20571e40b56d73d10819.tar.xz kernel-qcow2-linux-80e4342601abfafacb5f20571e40b56d73d10819.zip | |
[PATCH] zone reclaim: do not check references to a page during zone reclaim
shrink_list() and refill_inactive() check all ptes pointing to a page for
reference bits in order to decide if the page should be put on the active
list. This is not necessary for zone_reclaim since we are only interested
in removing unmapped pages. Skip the checks in both functions.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 5db32fdfaf39..e1c64230ffdd 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -443,6 +443,10 @@ static int shrink_list(struct list_head *page_list, struct scan_control *sc) BUG_ON(PageActive(page)); sc->nr_scanned++; + + if (!sc->may_swap && page_mapped(page)) + goto keep_locked; + /* Double the slab pressure for mapped and swapcache pages */ if (page_mapped(page) || PageSwapCache(page)) sc->nr_scanned++; @@ -1231,7 +1235,7 @@ refill_inactive_zone(struct zone *zone, struct scan_control *sc) * Now use this metric to decide whether to start moving mapped memory * onto the inactive list. */ - if (swap_tendency >= 100) + if (swap_tendency >= 100 && sc->may_swap) reclaim_mapped = 1; while (!list_empty(&l_hold)) { |