From: Minchan Kim <minchan....@gmail.com>
commit b9e84ac1536d35aee03b2601f19694949f0bd506 upstream.
Stable note: Not tracked in Bugzilla. This patch makes later patches
easier to apply but has no other impact.
acct_isolated of compaction uses page_lru_base_type which returns
only base type of LRU list so it never returns LRU_ACTIVE_ANON or
LRU_ACTIVE_FILE. In addition, cc->nr_[anon|file] is used in only
acct_isolated so it doesn't have fields in compact_control.
This patch removes fields from compact_control and makes clear function of
acct_issolated which counts the number of anon|file pages isolated.
Signed-off-by: Minchan Kim <minchan....@gmail.com>
Acked-by: Johannes Weiner <han...@cmpxchg.org>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hir...@jp.fujitsu.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motoh...@jp.fujitsu.com>
Acked-by: Mel Gorman <mgor...@suse.de>
Acked-by: Rik van Riel <r...@redhat.com>
Reviewed-by: Michal Hocko <mho...@suse.cz>
Cc: Andrea Arcangeli <aarca...@redhat.com>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
Signed-off-by: Mel Gorman <mgor...@suse.de>
---
mm/compaction.c | 18 +++++-------------
1 file changed, 5 insertions(+), 13 deletions(-)
diff --git a/mm/compaction.c b/mm/compaction.c
index c4bc5ac..d8c023e 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -35,10 +35,6 @@ struct compact_control {
unsigned long migrate_pfn; /* isolate_migratepages search base */
bool sync; /* Synchronous migration */
- /* Account for isolated anon and file pages */
- unsigned long nr_anon;
- unsigned long nr_file;
-
unsigned int order; /* order a direct compactor needs */
int migratetype; /* MOVABLE, RECLAIMABLE etc */
struct zone *zone;
@@ -223,17 +219,13 @@ static void isolate_freepages(struct zone *zone,
static void acct_isolated(struct zone *zone, struct compact_control *cc)
{
struct page *page;
- unsigned int count[NR_LRU_LISTS] = { 0, };
+ unsigned int count[2] = { 0, };
- list_for_each_entry(page, &cc->migratepages, lru) {
- int lru = page_lru_base_type(page);
- count[lru]++;
- }
+ list_for_each_entry(page, &cc->migratepages, lru)
+ count[!!page_is_file_cache(page)]++;
- cc->nr_anon = count[LRU_ACTIVE_ANON] + count[LRU_INACTIVE_ANON];
- cc->nr_file = count[LRU_ACTIVE_FILE] + count[LRU_INACTIVE_FILE];
- __mod_zone_page_state(zone, NR_ISOLATED_ANON, cc->nr_anon);
- __mod_zone_page_state(zone, NR_ISOLATED_FILE, cc->nr_file);
+ __mod_zone_page_state(zone, NR_ISOLATED_ANON, count[0]);
+ __mod_zone_page_state(zone, NR_ISOLATED_FILE, count[1]);
}
/* Similar to reclaim, but different enough that they don't share logic */
--
1.7.9.2
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