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-rw-r--r--mm/hugetlb.c34
1 files changed, 22 insertions, 12 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index bc727122dd4..59a0059b39e 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -30,7 +30,6 @@
#include <linux/hugetlb.h>
#include <linux/hugetlb_cgroup.h>
#include <linux/node.h>
-#include <linux/hugetlb_cgroup.h>
#include "internal.h"
const unsigned long hugetlb_zero = 0, hugetlb_infinity = ~0UL;
@@ -637,6 +636,7 @@ static void free_huge_page(struct page *page)
h->surplus_huge_pages--;
h->surplus_huge_pages_node[nid]--;
} else {
+ arch_clear_hugepage_flags(page);
enqueue_huge_page(h, page);
}
spin_unlock(&hugetlb_lock);
@@ -671,6 +671,11 @@ static void prep_compound_gigantic_page(struct page *page, unsigned long order)
}
}
+/*
+ * PageHuge() only returns true for hugetlbfs pages, but not for normal or
+ * transparent huge pages. See the PageTransHuge() documentation for more
+ * details.
+ */
int PageHuge(struct page *page)
{
compound_page_dtor *dtor;
@@ -2355,13 +2360,15 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
struct page *page;
struct hstate *h = hstate_vma(vma);
unsigned long sz = huge_page_size(h);
+ const unsigned long mmun_start = start; /* For mmu_notifiers */
+ const unsigned long mmun_end = end; /* For mmu_notifiers */
WARN_ON(!is_vm_hugetlb_page(vma));
BUG_ON(start & ~huge_page_mask(h));
BUG_ON(end & ~huge_page_mask(h));
tlb_start_vma(tlb, vma);
- mmu_notifier_invalidate_range_start(mm, start, end);
+ mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
again:
spin_lock(&mm->page_table_lock);
for (address = start; address < end; address += sz) {
@@ -2425,7 +2432,7 @@ again:
if (address < end && !ref_page)
goto again;
}
- mmu_notifier_invalidate_range_end(mm, start, end);
+ mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
tlb_end_vma(tlb, vma);
}
@@ -2473,7 +2480,6 @@ static int unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
struct hstate *h = hstate_vma(vma);
struct vm_area_struct *iter_vma;
struct address_space *mapping;
- struct prio_tree_iter iter;
pgoff_t pgoff;
/*
@@ -2481,7 +2487,8 @@ static int unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
* from page cache lookup which is in HPAGE_SIZE units.
*/
address = address & huge_page_mask(h);
- pgoff = vma_hugecache_offset(h, vma, address);
+ pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) +
+ vma->vm_pgoff;
mapping = vma->vm_file->f_dentry->d_inode->i_mapping;
/*
@@ -2490,7 +2497,7 @@ static int unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
* __unmap_hugepage_range() is called as the lock is already held
*/
mutex_lock(&mapping->i_mmap_mutex);
- vma_prio_tree_foreach(iter_vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
+ vma_interval_tree_foreach(iter_vma, &mapping->i_mmap, pgoff, pgoff) {
/* Do not unmap the current VMA */
if (iter_vma == vma)
continue;
@@ -2525,6 +2532,8 @@ static int hugetlb_cow(struct mm_struct *mm, struct vm_area_struct *vma,
struct page *old_page, *new_page;
int avoidcopy;
int outside_reserve = 0;
+ unsigned long mmun_start; /* For mmu_notifiers */
+ unsigned long mmun_end; /* For mmu_notifiers */
old_page = pte_page(pte);
@@ -2611,6 +2620,9 @@ retry_avoidcopy:
pages_per_huge_page(h));
__SetPageUptodate(new_page);
+ mmun_start = address & huge_page_mask(h);
+ mmun_end = mmun_start + huge_page_size(h);
+ mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
/*
* Retake the page_table_lock to check for racing updates
* before the page tables are altered
@@ -2619,9 +2631,6 @@ retry_avoidcopy:
ptep = huge_pte_offset(mm, address & huge_page_mask(h));
if (likely(pte_same(huge_ptep_get(ptep), pte))) {
/* Break COW */
- mmu_notifier_invalidate_range_start(mm,
- address & huge_page_mask(h),
- (address & huge_page_mask(h)) + huge_page_size(h));
huge_ptep_clear_flush(vma, address, ptep);
set_huge_pte_at(mm, address, ptep,
make_huge_pte(vma, new_page, 1));
@@ -2629,10 +2638,11 @@ retry_avoidcopy:
hugepage_add_new_anon_rmap(new_page, vma, address);
/* Make the old page be freed below */
new_page = old_page;
- mmu_notifier_invalidate_range_end(mm,
- address & huge_page_mask(h),
- (address & huge_page_mask(h)) + huge_page_size(h));
}
+ spin_unlock(&mm->page_table_lock);
+ mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
+ /* Caller expects lock to be held */
+ spin_lock(&mm->page_table_lock);
page_cache_release(new_page);
page_cache_release(old_page);
return 0;