diff options
Diffstat (limited to 'mm/rmap.c')
| -rw-r--r-- | mm/rmap.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index 53c56dacd72..f01e92244c5 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -360,8 +360,17 @@ static int page_referenced_one(struct page *page, goto out_unmap; } - if (ptep_clear_flush_young_notify(vma, address, pte)) - referenced++; + if (ptep_clear_flush_young_notify(vma, address, pte)) { + /* + * Don't treat a reference through a sequentially read + * mapping as such. If the page has been used in + * another mapping, we will catch it; if this other + * mapping is already gone, the unmap path will have + * set PG_referenced or activated the page. + */ + if (likely(!VM_SequentialReadHint(vma))) + referenced++; + } /* Pretend the page is referenced if the task has the swap token and is in the middle of a page fault. */ |