The patch titled
vmscan: evict streaming IO first
has been added to the -mm tree. Its filename is
vmscan-evict-streaming-io-first.patch
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------------------------------------------------------
Subject: vmscan: evict streaming IO first
From: Rik van Riel <riel@xxxxxxxxxx>
Count the insertion of new pages in the statistics used to drive the
pageout scanning code. This should help the kernel quickly evict
streaming file IO.
We count on the fact that new file pages start on the inactive file LRU
and new anonymous pages start on the active anon list. This means
streaming file IO will increment the recent scanned file statistic, while
leaving the recent rotated file statistic alone, driving pageout scanning
to the file LRUs.
Pageout activity does its own list manipulation.
Signed-off-by: Rik van Riel <riel@xxxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Gene Heskett <gene.heskett@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/swap.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff -puN mm/swap.c~vmscan-evict-streaming-io-first mm/swap.c
--- a/mm/swap.c~vmscan-evict-streaming-io-first
+++ a/mm/swap.c
@@ -445,6 +445,7 @@ void ____pagevec_lru_add(struct pagevec
for (i = 0; i < pagevec_count(pvec); i++) {
struct page *page = pvec->pages[i];
struct zone *pagezone = page_zone(page);
+ int file;
if (pagezone != zone) {
if (zone)
@@ -456,8 +457,12 @@ void ____pagevec_lru_add(struct pagevec
VM_BUG_ON(PageUnevictable(page));
VM_BUG_ON(PageLRU(page));
SetPageLRU(page);
- if (is_active_lru(lru))
+ file = is_file_lru(lru);
+ zone->recent_scanned[file]++;
+ if (is_active_lru(lru)) {
SetPageActive(page);
+ zone->recent_rotated[file]++;
+ }
add_page_to_lru_list(zone, page, lru);
}
if (zone)
_
Patches currently in -mm which might be from riel@xxxxxxxxxx are
vmscan-let-gfp_nofs-go-to-swap-again.patch
vmscan-fix-get_scan_ratio-comment.patch
linux-next.patch
vmscan-evict-streaming-io-first.patch
mm-more-likely-reclaim-madv_sequential-mappings.patch
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