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| author | Rik van Riel <riel@redhat.com> | 2011-01-13 15:47:13 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 17:32:46 -0800 |
| commit | 9992af102974f3f8a02a1f2729c3461881539e26 (patch) | |
| tree | 40958e1a8bd7efc7c9a4d28e2b77d86bb8688734 | |
| parent | 2c888cfbc1b45508a44763d85ba2e8ac43faff5f (diff) | |
| download | op-kernel-dev-9992af102974f3f8a02a1f2729c3461881539e26.zip op-kernel-dev-9992af102974f3f8a02a1f2729c3461881539e26.tar.gz | |
thp: scale nr_rotated to balance memory pressure
Make sure we scale up nr_rotated when we encounter a referenced
transparent huge page. This ensures pageout scanning balance is not
distorted when there are huge pages on the LRU.
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/vmscan.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 0882014..47a5096 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1276,7 +1276,8 @@ putback_lru_pages(struct zone *zone, struct scan_control *sc, add_page_to_lru_list(zone, page, lru); if (is_active_lru(lru)) { int file = is_file_lru(lru); - reclaim_stat->recent_rotated[file]++; + int numpages = hpage_nr_pages(page); + reclaim_stat->recent_rotated[file] += numpages; } if (!pagevec_add(&pvec, page)) { spin_unlock_irq(&zone->lru_lock); @@ -1552,7 +1553,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone, } if (page_referenced(page, 0, sc->mem_cgroup, &vm_flags)) { - nr_rotated++; + nr_rotated += hpage_nr_pages(page); /* * Identify referenced, file-backed active pages and * give them one more trip around the active list. So |
