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vmscan: Use an indexed array for LRU variables

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Currently we are defining explicit variables for the inactive and active
list.  An indexed array can be more generic and avoid repeating similar
code in several places in the reclaim code.

We are saving a few bytes in terms of code size:

Before:

   text    data     bss     dec     hex filename
4097753  573120 4092484 8763357  85b7dd vmlinux

After:

   text    data     bss     dec     hex filename
4097729  573120 4092484 8763333  85b7c5 vmlinux

Having an easy way to add new lru lists may ease future work on the
reclaim code.

Signed-off-by: Rik van Riel <[email protected]>
Signed-off-by: Lee Schermerhorn <[email protected]>
Signed-off-by: Christoph Lameter <[email protected]>
Signed-off-by: KOSAKI Motohiro <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Lameter 2008-10-18 20:26:14 -07:00 • committed by Linus Torvalds
commit b69408e88b
8 changed files with 171 additions and 170 deletions
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3
mm/vmstat.c
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@ -696,7 +696,8 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
zone->pages_low,
zone->pages_high,
zone->pages_scanned,
zone->nr_scan_active, zone->nr_scan_inactive,
zone->lru[LRU_ACTIVE].nr_scan,
zone->lru[LRU_INACTIVE].nr_scan,
zone->spanned_pages,
zone->present_pages);