Messages in this thread Patch in this message | | | Subject | [PATCH 64 of 66] scale nr_rotated to balance memory pressure | Date | Wed, 03 Nov 2010 16:28:39 +0100 | From | Andrea Arcangeli <> |
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From: Rik van Riel <riel@redhat.com>
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> ---
diff --git a/mm/vmscan.c b/mm/vmscan.c --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1259,7 +1259,8 @@ putback_lru_pages(struct zone *zone, str 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); @@ -1535,7 +1536,7 @@ static void shrink_active_list(unsigned } 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
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