mm: page cache: store only head pages in i_pages
Transparent Huge Pages are currently stored in i_pages as pointers to consecutive subpages. This patch changes that to storing consecutive pointers to the head page in preparation for storing huge pages more efficiently in i_pages. Large parts of this are "inspired" by Kirill's patch https://lore.kernel.org/lkml/20170126115819.58875-2-kirill.shutemov@linux.intel.com/ [willy@infradead.org: fix swapcache pages] Link: http://lkml.kernel.org/r/20190324155441.GF10344@bombadil.infradead.org [kirill@shutemov.name: hugetlb stores pages in page cache differently] Link: http://lkml.kernel.org/r/20190404134553.vuvhgmghlkiw2hgl@kshutemo-mobl1 Link: http://lkml.kernel.org/r/20190307153051.18815-1-willy@infradead.org Signed-off-by: Matthew Wilcox <willy@infradead.org> Acked-by: Jan Kara <jack@suse.cz> Reviewed-by: Kirill Shutemov <kirill@shutemov.name> Reviewed-and-tested-by: Song Liu <songliubraving@fb.com> Tested-by: William Kucharski <william.kucharski@oracle.com> Reviewed-by: William Kucharski <william.kucharski@oracle.com> Tested-by: Qian Cai <cai@lca.pw> Cc: Hugh Dickins <hughd@google.com> Cc: Song Liu <liu.song.a23@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
cefdca0a86
commit
5fd4ca2d84
|
@ -333,6 +333,19 @@ static inline struct page *grab_cache_page_nowait(struct address_space *mapping,
|
||||||
mapping_gfp_mask(mapping));
|
mapping_gfp_mask(mapping));
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static inline struct page *find_subpage(struct page *page, pgoff_t offset)
|
||||||
|
{
|
||||||
|
unsigned long mask;
|
||||||
|
|
||||||
|
if (PageHuge(page))
|
||||||
|
return page;
|
||||||
|
|
||||||
|
VM_BUG_ON_PAGE(PageTail(page), page);
|
||||||
|
|
||||||
|
mask = (1UL << compound_order(page)) - 1;
|
||||||
|
return page + (offset & mask);
|
||||||
|
}
|
||||||
|
|
||||||
struct page *find_get_entry(struct address_space *mapping, pgoff_t offset);
|
struct page *find_get_entry(struct address_space *mapping, pgoff_t offset);
|
||||||
struct page *find_lock_entry(struct address_space *mapping, pgoff_t offset);
|
struct page *find_lock_entry(struct address_space *mapping, pgoff_t offset);
|
||||||
unsigned find_get_entries(struct address_space *mapping, pgoff_t start,
|
unsigned find_get_entries(struct address_space *mapping, pgoff_t start,
|
||||||
|
|
161
mm/filemap.c
161
mm/filemap.c
|
@ -279,11 +279,11 @@ EXPORT_SYMBOL(delete_from_page_cache);
|
||||||
* @pvec: pagevec with pages to delete
|
* @pvec: pagevec with pages to delete
|
||||||
*
|
*
|
||||||
* The function walks over mapping->i_pages and removes pages passed in @pvec
|
* The function walks over mapping->i_pages and removes pages passed in @pvec
|
||||||
* from the mapping. The function expects @pvec to be sorted by page index.
|
* from the mapping. The function expects @pvec to be sorted by page index
|
||||||
|
* and is optimised for it to be dense.
|
||||||
* It tolerates holes in @pvec (mapping entries at those indices are not
|
* It tolerates holes in @pvec (mapping entries at those indices are not
|
||||||
* modified). The function expects only THP head pages to be present in the
|
* modified). The function expects only THP head pages to be present in the
|
||||||
* @pvec and takes care to delete all corresponding tail pages from the
|
* @pvec.
|
||||||
* mapping as well.
|
|
||||||
*
|
*
|
||||||
* The function expects the i_pages lock to be held.
|
* The function expects the i_pages lock to be held.
|
||||||
*/
|
*/
|
||||||
|
@ -292,40 +292,44 @@ static void page_cache_delete_batch(struct address_space *mapping,
|
||||||
{
|
{
|
||||||
XA_STATE(xas, &mapping->i_pages, pvec->pages[0]->index);
|
XA_STATE(xas, &mapping->i_pages, pvec->pages[0]->index);
|
||||||
int total_pages = 0;
|
int total_pages = 0;
|
||||||
int i = 0, tail_pages = 0;
|
int i = 0;
|
||||||
struct page *page;
|
struct page *page;
|
||||||
|
|
||||||
mapping_set_update(&xas, mapping);
|
mapping_set_update(&xas, mapping);
|
||||||
xas_for_each(&xas, page, ULONG_MAX) {
|
xas_for_each(&xas, page, ULONG_MAX) {
|
||||||
if (i >= pagevec_count(pvec) && !tail_pages)
|
if (i >= pagevec_count(pvec))
|
||||||
break;
|
break;
|
||||||
|
|
||||||
|
/* A swap/dax/shadow entry got inserted? Skip it. */
|
||||||
if (xa_is_value(page))
|
if (xa_is_value(page))
|
||||||
continue;
|
continue;
|
||||||
if (!tail_pages) {
|
/*
|
||||||
/*
|
* A page got inserted in our range? Skip it. We have our
|
||||||
* Some page got inserted in our range? Skip it. We
|
* pages locked so they are protected from being removed.
|
||||||
* have our pages locked so they are protected from
|
* If we see a page whose index is higher than ours, it
|
||||||
* being removed.
|
* means our page has been removed, which shouldn't be
|
||||||
*/
|
* possible because we're holding the PageLock.
|
||||||
if (page != pvec->pages[i]) {
|
*/
|
||||||
VM_BUG_ON_PAGE(page->index >
|
if (page != pvec->pages[i]) {
|
||||||
pvec->pages[i]->index, page);
|
VM_BUG_ON_PAGE(page->index > pvec->pages[i]->index,
|
||||||
continue;
|
page);
|
||||||
}
|
continue;
|
||||||
WARN_ON_ONCE(!PageLocked(page));
|
|
||||||
if (PageTransHuge(page) && !PageHuge(page))
|
|
||||||
tail_pages = HPAGE_PMD_NR - 1;
|
|
||||||
page->mapping = NULL;
|
|
||||||
/*
|
|
||||||
* Leave page->index set: truncation lookup relies
|
|
||||||
* upon it
|
|
||||||
*/
|
|
||||||
i++;
|
|
||||||
} else {
|
|
||||||
VM_BUG_ON_PAGE(page->index + HPAGE_PMD_NR - tail_pages
|
|
||||||
!= pvec->pages[i]->index, page);
|
|
||||||
tail_pages--;
|
|
||||||
}
|
}
|
||||||
|
|
||||||
|
WARN_ON_ONCE(!PageLocked(page));
|
||||||
|
|
||||||
|
if (page->index == xas.xa_index)
|
||||||
|
page->mapping = NULL;
|
||||||
|
/* Leave page->index set: truncation lookup relies on it */
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Move to the next page in the vector if this is a regular
|
||||||
|
* page or the index is of the last sub-page of this compound
|
||||||
|
* page.
|
||||||
|
*/
|
||||||
|
if (page->index + (1UL << compound_order(page)) - 1 ==
|
||||||
|
xas.xa_index)
|
||||||
|
i++;
|
||||||
xas_store(&xas, NULL);
|
xas_store(&xas, NULL);
|
||||||
total_pages++;
|
total_pages++;
|
||||||
}
|
}
|
||||||
|
@ -1491,7 +1495,7 @@ EXPORT_SYMBOL(page_cache_prev_miss);
|
||||||
struct page *find_get_entry(struct address_space *mapping, pgoff_t offset)
|
struct page *find_get_entry(struct address_space *mapping, pgoff_t offset)
|
||||||
{
|
{
|
||||||
XA_STATE(xas, &mapping->i_pages, offset);
|
XA_STATE(xas, &mapping->i_pages, offset);
|
||||||
struct page *head, *page;
|
struct page *page;
|
||||||
|
|
||||||
rcu_read_lock();
|
rcu_read_lock();
|
||||||
repeat:
|
repeat:
|
||||||
|
@ -1506,25 +1510,19 @@ repeat:
|
||||||
if (!page || xa_is_value(page))
|
if (!page || xa_is_value(page))
|
||||||
goto out;
|
goto out;
|
||||||
|
|
||||||
head = compound_head(page);
|
if (!page_cache_get_speculative(page))
|
||||||
if (!page_cache_get_speculative(head))
|
|
||||||
goto repeat;
|
goto repeat;
|
||||||
|
|
||||||
/* The page was split under us? */
|
|
||||||
if (compound_head(page) != head) {
|
|
||||||
put_page(head);
|
|
||||||
goto repeat;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Has the page moved?
|
* Has the page moved or been split?
|
||||||
* This is part of the lockless pagecache protocol. See
|
* This is part of the lockless pagecache protocol. See
|
||||||
* include/linux/pagemap.h for details.
|
* include/linux/pagemap.h for details.
|
||||||
*/
|
*/
|
||||||
if (unlikely(page != xas_reload(&xas))) {
|
if (unlikely(page != xas_reload(&xas))) {
|
||||||
put_page(head);
|
put_page(page);
|
||||||
goto repeat;
|
goto repeat;
|
||||||
}
|
}
|
||||||
|
page = find_subpage(page, offset);
|
||||||
out:
|
out:
|
||||||
rcu_read_unlock();
|
rcu_read_unlock();
|
||||||
|
|
||||||
|
@ -1706,7 +1704,6 @@ unsigned find_get_entries(struct address_space *mapping,
|
||||||
|
|
||||||
rcu_read_lock();
|
rcu_read_lock();
|
||||||
xas_for_each(&xas, page, ULONG_MAX) {
|
xas_for_each(&xas, page, ULONG_MAX) {
|
||||||
struct page *head;
|
|
||||||
if (xas_retry(&xas, page))
|
if (xas_retry(&xas, page))
|
||||||
continue;
|
continue;
|
||||||
/*
|
/*
|
||||||
|
@ -1717,17 +1714,13 @@ unsigned find_get_entries(struct address_space *mapping,
|
||||||
if (xa_is_value(page))
|
if (xa_is_value(page))
|
||||||
goto export;
|
goto export;
|
||||||
|
|
||||||
head = compound_head(page);
|
if (!page_cache_get_speculative(page))
|
||||||
if (!page_cache_get_speculative(head))
|
|
||||||
goto retry;
|
goto retry;
|
||||||
|
|
||||||
/* The page was split under us? */
|
/* Has the page moved or been split? */
|
||||||
if (compound_head(page) != head)
|
|
||||||
goto put_page;
|
|
||||||
|
|
||||||
/* Has the page moved? */
|
|
||||||
if (unlikely(page != xas_reload(&xas)))
|
if (unlikely(page != xas_reload(&xas)))
|
||||||
goto put_page;
|
goto put_page;
|
||||||
|
page = find_subpage(page, xas.xa_index);
|
||||||
|
|
||||||
export:
|
export:
|
||||||
indices[ret] = xas.xa_index;
|
indices[ret] = xas.xa_index;
|
||||||
|
@ -1736,7 +1729,7 @@ export:
|
||||||
break;
|
break;
|
||||||
continue;
|
continue;
|
||||||
put_page:
|
put_page:
|
||||||
put_page(head);
|
put_page(page);
|
||||||
retry:
|
retry:
|
||||||
xas_reset(&xas);
|
xas_reset(&xas);
|
||||||
}
|
}
|
||||||
|
@ -1778,33 +1771,27 @@ unsigned find_get_pages_range(struct address_space *mapping, pgoff_t *start,
|
||||||
|
|
||||||
rcu_read_lock();
|
rcu_read_lock();
|
||||||
xas_for_each(&xas, page, end) {
|
xas_for_each(&xas, page, end) {
|
||||||
struct page *head;
|
|
||||||
if (xas_retry(&xas, page))
|
if (xas_retry(&xas, page))
|
||||||
continue;
|
continue;
|
||||||
/* Skip over shadow, swap and DAX entries */
|
/* Skip over shadow, swap and DAX entries */
|
||||||
if (xa_is_value(page))
|
if (xa_is_value(page))
|
||||||
continue;
|
continue;
|
||||||
|
|
||||||
head = compound_head(page);
|
if (!page_cache_get_speculative(page))
|
||||||
if (!page_cache_get_speculative(head))
|
|
||||||
goto retry;
|
goto retry;
|
||||||
|
|
||||||
/* The page was split under us? */
|
/* Has the page moved or been split? */
|
||||||
if (compound_head(page) != head)
|
|
||||||
goto put_page;
|
|
||||||
|
|
||||||
/* Has the page moved? */
|
|
||||||
if (unlikely(page != xas_reload(&xas)))
|
if (unlikely(page != xas_reload(&xas)))
|
||||||
goto put_page;
|
goto put_page;
|
||||||
|
|
||||||
pages[ret] = page;
|
pages[ret] = find_subpage(page, xas.xa_index);
|
||||||
if (++ret == nr_pages) {
|
if (++ret == nr_pages) {
|
||||||
*start = xas.xa_index + 1;
|
*start = xas.xa_index + 1;
|
||||||
goto out;
|
goto out;
|
||||||
}
|
}
|
||||||
continue;
|
continue;
|
||||||
put_page:
|
put_page:
|
||||||
put_page(head);
|
put_page(page);
|
||||||
retry:
|
retry:
|
||||||
xas_reset(&xas);
|
xas_reset(&xas);
|
||||||
}
|
}
|
||||||
|
@ -1849,7 +1836,6 @@ unsigned find_get_pages_contig(struct address_space *mapping, pgoff_t index,
|
||||||
|
|
||||||
rcu_read_lock();
|
rcu_read_lock();
|
||||||
for (page = xas_load(&xas); page; page = xas_next(&xas)) {
|
for (page = xas_load(&xas); page; page = xas_next(&xas)) {
|
||||||
struct page *head;
|
|
||||||
if (xas_retry(&xas, page))
|
if (xas_retry(&xas, page))
|
||||||
continue;
|
continue;
|
||||||
/*
|
/*
|
||||||
|
@ -1859,24 +1845,19 @@ unsigned find_get_pages_contig(struct address_space *mapping, pgoff_t index,
|
||||||
if (xa_is_value(page))
|
if (xa_is_value(page))
|
||||||
break;
|
break;
|
||||||
|
|
||||||
head = compound_head(page);
|
if (!page_cache_get_speculative(page))
|
||||||
if (!page_cache_get_speculative(head))
|
|
||||||
goto retry;
|
goto retry;
|
||||||
|
|
||||||
/* The page was split under us? */
|
/* Has the page moved or been split? */
|
||||||
if (compound_head(page) != head)
|
|
||||||
goto put_page;
|
|
||||||
|
|
||||||
/* Has the page moved? */
|
|
||||||
if (unlikely(page != xas_reload(&xas)))
|
if (unlikely(page != xas_reload(&xas)))
|
||||||
goto put_page;
|
goto put_page;
|
||||||
|
|
||||||
pages[ret] = page;
|
pages[ret] = find_subpage(page, xas.xa_index);
|
||||||
if (++ret == nr_pages)
|
if (++ret == nr_pages)
|
||||||
break;
|
break;
|
||||||
continue;
|
continue;
|
||||||
put_page:
|
put_page:
|
||||||
put_page(head);
|
put_page(page);
|
||||||
retry:
|
retry:
|
||||||
xas_reset(&xas);
|
xas_reset(&xas);
|
||||||
}
|
}
|
||||||
|
@ -1912,7 +1893,6 @@ unsigned find_get_pages_range_tag(struct address_space *mapping, pgoff_t *index,
|
||||||
|
|
||||||
rcu_read_lock();
|
rcu_read_lock();
|
||||||
xas_for_each_marked(&xas, page, end, tag) {
|
xas_for_each_marked(&xas, page, end, tag) {
|
||||||
struct page *head;
|
|
||||||
if (xas_retry(&xas, page))
|
if (xas_retry(&xas, page))
|
||||||
continue;
|
continue;
|
||||||
/*
|
/*
|
||||||
|
@ -1923,26 +1903,21 @@ unsigned find_get_pages_range_tag(struct address_space *mapping, pgoff_t *index,
|
||||||
if (xa_is_value(page))
|
if (xa_is_value(page))
|
||||||
continue;
|
continue;
|
||||||
|
|
||||||
head = compound_head(page);
|
if (!page_cache_get_speculative(page))
|
||||||
if (!page_cache_get_speculative(head))
|
|
||||||
goto retry;
|
goto retry;
|
||||||
|
|
||||||
/* The page was split under us? */
|
/* Has the page moved or been split? */
|
||||||
if (compound_head(page) != head)
|
|
||||||
goto put_page;
|
|
||||||
|
|
||||||
/* Has the page moved? */
|
|
||||||
if (unlikely(page != xas_reload(&xas)))
|
if (unlikely(page != xas_reload(&xas)))
|
||||||
goto put_page;
|
goto put_page;
|
||||||
|
|
||||||
pages[ret] = page;
|
pages[ret] = find_subpage(page, xas.xa_index);
|
||||||
if (++ret == nr_pages) {
|
if (++ret == nr_pages) {
|
||||||
*index = xas.xa_index + 1;
|
*index = xas.xa_index + 1;
|
||||||
goto out;
|
goto out;
|
||||||
}
|
}
|
||||||
continue;
|
continue;
|
||||||
put_page:
|
put_page:
|
||||||
put_page(head);
|
put_page(page);
|
||||||
retry:
|
retry:
|
||||||
xas_reset(&xas);
|
xas_reset(&xas);
|
||||||
}
|
}
|
||||||
|
@ -1991,7 +1966,6 @@ unsigned find_get_entries_tag(struct address_space *mapping, pgoff_t start,
|
||||||
|
|
||||||
rcu_read_lock();
|
rcu_read_lock();
|
||||||
xas_for_each_marked(&xas, page, ULONG_MAX, tag) {
|
xas_for_each_marked(&xas, page, ULONG_MAX, tag) {
|
||||||
struct page *head;
|
|
||||||
if (xas_retry(&xas, page))
|
if (xas_retry(&xas, page))
|
||||||
continue;
|
continue;
|
||||||
/*
|
/*
|
||||||
|
@ -2002,17 +1976,13 @@ unsigned find_get_entries_tag(struct address_space *mapping, pgoff_t start,
|
||||||
if (xa_is_value(page))
|
if (xa_is_value(page))
|
||||||
goto export;
|
goto export;
|
||||||
|
|
||||||
head = compound_head(page);
|
if (!page_cache_get_speculative(page))
|
||||||
if (!page_cache_get_speculative(head))
|
|
||||||
goto retry;
|
goto retry;
|
||||||
|
|
||||||
/* The page was split under us? */
|
/* Has the page moved or been split? */
|
||||||
if (compound_head(page) != head)
|
|
||||||
goto put_page;
|
|
||||||
|
|
||||||
/* Has the page moved? */
|
|
||||||
if (unlikely(page != xas_reload(&xas)))
|
if (unlikely(page != xas_reload(&xas)))
|
||||||
goto put_page;
|
goto put_page;
|
||||||
|
page = find_subpage(page, xas.xa_index);
|
||||||
|
|
||||||
export:
|
export:
|
||||||
indices[ret] = xas.xa_index;
|
indices[ret] = xas.xa_index;
|
||||||
|
@ -2021,7 +1991,7 @@ export:
|
||||||
break;
|
break;
|
||||||
continue;
|
continue;
|
||||||
put_page:
|
put_page:
|
||||||
put_page(head);
|
put_page(page);
|
||||||
retry:
|
retry:
|
||||||
xas_reset(&xas);
|
xas_reset(&xas);
|
||||||
}
|
}
|
||||||
|
@ -2691,7 +2661,7 @@ void filemap_map_pages(struct vm_fault *vmf,
|
||||||
pgoff_t last_pgoff = start_pgoff;
|
pgoff_t last_pgoff = start_pgoff;
|
||||||
unsigned long max_idx;
|
unsigned long max_idx;
|
||||||
XA_STATE(xas, &mapping->i_pages, start_pgoff);
|
XA_STATE(xas, &mapping->i_pages, start_pgoff);
|
||||||
struct page *head, *page;
|
struct page *page;
|
||||||
|
|
||||||
rcu_read_lock();
|
rcu_read_lock();
|
||||||
xas_for_each(&xas, page, end_pgoff) {
|
xas_for_each(&xas, page, end_pgoff) {
|
||||||
|
@ -2700,24 +2670,19 @@ void filemap_map_pages(struct vm_fault *vmf,
|
||||||
if (xa_is_value(page))
|
if (xa_is_value(page))
|
||||||
goto next;
|
goto next;
|
||||||
|
|
||||||
head = compound_head(page);
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Check for a locked page first, as a speculative
|
* Check for a locked page first, as a speculative
|
||||||
* reference may adversely influence page migration.
|
* reference may adversely influence page migration.
|
||||||
*/
|
*/
|
||||||
if (PageLocked(head))
|
if (PageLocked(page))
|
||||||
goto next;
|
goto next;
|
||||||
if (!page_cache_get_speculative(head))
|
if (!page_cache_get_speculative(page))
|
||||||
goto next;
|
goto next;
|
||||||
|
|
||||||
/* The page was split under us? */
|
/* Has the page moved or been split? */
|
||||||
if (compound_head(page) != head)
|
|
||||||
goto skip;
|
|
||||||
|
|
||||||
/* Has the page moved? */
|
|
||||||
if (unlikely(page != xas_reload(&xas)))
|
if (unlikely(page != xas_reload(&xas)))
|
||||||
goto skip;
|
goto skip;
|
||||||
|
page = find_subpage(page, xas.xa_index);
|
||||||
|
|
||||||
if (!PageUptodate(page) ||
|
if (!PageUptodate(page) ||
|
||||||
PageReadahead(page) ||
|
PageReadahead(page) ||
|
||||||
|
|
|
@ -2496,6 +2496,9 @@ static void __split_huge_page(struct page *page, struct list_head *list,
|
||||||
if (IS_ENABLED(CONFIG_SHMEM) && PageSwapBacked(head))
|
if (IS_ENABLED(CONFIG_SHMEM) && PageSwapBacked(head))
|
||||||
shmem_uncharge(head->mapping->host, 1);
|
shmem_uncharge(head->mapping->host, 1);
|
||||||
put_page(head + i);
|
put_page(head + i);
|
||||||
|
} else if (!PageAnon(page)) {
|
||||||
|
__xa_store(&head->mapping->i_pages, head[i].index,
|
||||||
|
head + i, 0);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
@ -1374,7 +1374,7 @@ static void collapse_shmem(struct mm_struct *mm,
|
||||||
result = SCAN_FAIL;
|
result = SCAN_FAIL;
|
||||||
goto xa_locked;
|
goto xa_locked;
|
||||||
}
|
}
|
||||||
xas_store(&xas, new_page + (index % HPAGE_PMD_NR));
|
xas_store(&xas, new_page);
|
||||||
nr_none++;
|
nr_none++;
|
||||||
continue;
|
continue;
|
||||||
}
|
}
|
||||||
|
@ -1450,7 +1450,7 @@ static void collapse_shmem(struct mm_struct *mm,
|
||||||
list_add_tail(&page->lru, &pagelist);
|
list_add_tail(&page->lru, &pagelist);
|
||||||
|
|
||||||
/* Finally, replace with the new page. */
|
/* Finally, replace with the new page. */
|
||||||
xas_store(&xas, new_page + (index % HPAGE_PMD_NR));
|
xas_store(&xas, new_page);
|
||||||
continue;
|
continue;
|
||||||
out_unlock:
|
out_unlock:
|
||||||
unlock_page(page);
|
unlock_page(page);
|
||||||
|
|
|
@ -39,6 +39,7 @@ static void memfd_tag_pins(struct xa_state *xas)
|
||||||
xas_for_each(xas, page, ULONG_MAX) {
|
xas_for_each(xas, page, ULONG_MAX) {
|
||||||
if (xa_is_value(page))
|
if (xa_is_value(page))
|
||||||
continue;
|
continue;
|
||||||
|
page = find_subpage(page, xas->xa_index);
|
||||||
if (page_count(page) - page_mapcount(page) > 1)
|
if (page_count(page) - page_mapcount(page) > 1)
|
||||||
xas_set_mark(xas, MEMFD_TAG_PINNED);
|
xas_set_mark(xas, MEMFD_TAG_PINNED);
|
||||||
|
|
||||||
|
@ -88,6 +89,7 @@ static int memfd_wait_for_pins(struct address_space *mapping)
|
||||||
bool clear = true;
|
bool clear = true;
|
||||||
if (xa_is_value(page))
|
if (xa_is_value(page))
|
||||||
continue;
|
continue;
|
||||||
|
page = find_subpage(page, xas.xa_index);
|
||||||
if (page_count(page) - page_mapcount(page) != 1) {
|
if (page_count(page) - page_mapcount(page) != 1) {
|
||||||
/*
|
/*
|
||||||
* On the last scan, we clean up all those tags
|
* On the last scan, we clean up all those tags
|
||||||
|
|
|
@ -463,7 +463,7 @@ int migrate_page_move_mapping(struct address_space *mapping,
|
||||||
|
|
||||||
for (i = 1; i < HPAGE_PMD_NR; i++) {
|
for (i = 1; i < HPAGE_PMD_NR; i++) {
|
||||||
xas_next(&xas);
|
xas_next(&xas);
|
||||||
xas_store(&xas, newpage + i);
|
xas_store(&xas, newpage);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
@ -614,7 +614,7 @@ static int shmem_add_to_page_cache(struct page *page,
|
||||||
if (xas_error(&xas))
|
if (xas_error(&xas))
|
||||||
goto unlock;
|
goto unlock;
|
||||||
next:
|
next:
|
||||||
xas_store(&xas, page + i);
|
xas_store(&xas, page);
|
||||||
if (++i < nr) {
|
if (++i < nr) {
|
||||||
xas_next(&xas);
|
xas_next(&xas);
|
||||||
goto next;
|
goto next;
|
||||||
|
|
|
@ -132,7 +132,7 @@ int add_to_swap_cache(struct page *page, swp_entry_t entry, gfp_t gfp)
|
||||||
for (i = 0; i < nr; i++) {
|
for (i = 0; i < nr; i++) {
|
||||||
VM_BUG_ON_PAGE(xas.xa_index != idx + i, page);
|
VM_BUG_ON_PAGE(xas.xa_index != idx + i, page);
|
||||||
set_page_private(page + i, entry.val + i);
|
set_page_private(page + i, entry.val + i);
|
||||||
xas_store(&xas, page + i);
|
xas_store(&xas, page);
|
||||||
xas_next(&xas);
|
xas_next(&xas);
|
||||||
}
|
}
|
||||||
address_space->nrpages += nr;
|
address_space->nrpages += nr;
|
||||||
|
@ -167,7 +167,7 @@ void __delete_from_swap_cache(struct page *page, swp_entry_t entry)
|
||||||
|
|
||||||
for (i = 0; i < nr; i++) {
|
for (i = 0; i < nr; i++) {
|
||||||
void *entry = xas_store(&xas, NULL);
|
void *entry = xas_store(&xas, NULL);
|
||||||
VM_BUG_ON_PAGE(entry != page + i, entry);
|
VM_BUG_ON_PAGE(entry != page, entry);
|
||||||
set_page_private(page + i, 0);
|
set_page_private(page + i, 0);
|
||||||
xas_next(&xas);
|
xas_next(&xas);
|
||||||
}
|
}
|
||||||
|
|
Loading…
Reference in a new issue