diff options
Diffstat (limited to 'mm/rmap.c')
| -rw-r--r-- | mm/rmap.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index 30b739ce0ffa..945933a01010 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1431,6 +1431,8 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma, if ((flags & TTU_MUNLOCK) && !(vma->vm_flags & VM_LOCKED)) goto out; + if (flags & TTU_SPLIT_HUGE_PMD) + split_huge_pmd_address(vma, address); pte = page_check_address(page, mm, address, &ptl, 0); if (!pte) goto out; @@ -1576,10 +1578,10 @@ static bool invalid_migration_vma(struct vm_area_struct *vma, void *arg) return is_vma_temporary_stack(vma); } -static int page_not_mapped(struct page *page) +static int page_mapcount_is_zero(struct page *page) { - return !page_mapped(page); -}; + return !page_mapcount(page); +} /** * try_to_unmap - try to remove all page table mappings to a page @@ -1606,12 +1608,10 @@ int try_to_unmap(struct page *page, enum ttu_flags flags) struct rmap_walk_control rwc = { .rmap_one = try_to_unmap_one, .arg = &rp, - .done = page_not_mapped, + .done = page_mapcount_is_zero, .anon_lock = page_lock_anon_vma_read, }; - VM_BUG_ON_PAGE(!PageHuge(page) && PageTransHuge(page), page); - /* * During exec, a temporary VMA is setup and later moved. * The VMA is moved under the anon_vma lock but not the @@ -1623,9 +1623,12 @@ int try_to_unmap(struct page *page, enum ttu_flags flags) if ((flags & TTU_MIGRATION) && !PageKsm(page) && PageAnon(page)) rwc.invalid_vma = invalid_migration_vma; - ret = rmap_walk(page, &rwc); + if (flags & TTU_RMAP_LOCKED) + ret = rmap_walk_locked(page, &rwc); + else + ret = rmap_walk(page, &rwc); - if (ret != SWAP_MLOCK && !page_mapped(page)) { + if (ret != SWAP_MLOCK && !page_mapcount(page)) { ret = SWAP_SUCCESS; if (rp.lazyfreed && !PageDirty(page)) ret = SWAP_LZFREE; @@ -1633,6 +1636,11 @@ int try_to_unmap(struct page *page, enum ttu_flags flags) return ret; } +static int page_not_mapped(struct page *page) +{ + return !page_mapped(page); +}; + /** * try_to_munlock - try to munlock a page * @page: the page to be munlocked |