diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/mm/memory.c b/mm/memory.c index 5129f3ecc039..c7723bdaf0c3 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3294,7 +3294,15 @@ static vm_fault_t do_wp_page(struct vm_fault *vmf) * * PageKsm() doesn't necessarily raise the page refcount. */ - if (PageKsm(page) || page_count(page) > 1 + PageSwapCache(page)) + if (PageKsm(page) || page_count(page) > 3) + goto copy; + if (!PageLRU(page)) + /* + * Note: We cannot easily detect+handle references from + * remote LRU pagevecs or references to PageLRU() pages. + */ + lru_add_drain(); + if (page_count(page) > 1 + PageSwapCache(page)) goto copy; if (!trylock_page(page)) goto copy; |