The patch titled
Subject: mm: add an 'end' parameter to pagevec_lookup_entries
has been added to the -mm tree. Its filename is
mm-add-an-end-parameter-to-pagevec_lookup_entries.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-add-an-end-parameter-to-pagevec_lookup_entries.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-add-an-end-parameter-to-pagevec_lookup_entries.patch
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------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: mm: add an 'end' parameter to pagevec_lookup_entries
Simplifies the callers and uses the existing functionality in
find_get_entries(). We can also drop the final argument of
truncate_exceptional_pvec_entries() and simplify the logic in that
function.
Link: https://lkml.kernel.org/r/20201112212641.27837-12-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
Reviewed-by: William Kucharski <william.kucharski@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Dave Chinner <dchinner@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Yang Shi <yang.shi@xxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/pagevec.h | 5 +---
mm/swap.c | 8 +++----
mm/truncate.c | 41 +++++++++-----------------------------
3 files changed, 16 insertions(+), 38 deletions(-)
--- a/include/linux/pagevec.h~mm-add-an-end-parameter-to-pagevec_lookup_entries
+++ a/include/linux/pagevec.h
@@ -26,9 +26,8 @@ struct pagevec {
void __pagevec_release(struct pagevec *pvec);
void __pagevec_lru_add(struct pagevec *pvec);
unsigned pagevec_lookup_entries(struct pagevec *pvec,
- struct address_space *mapping,
- pgoff_t start, unsigned nr_entries,
- pgoff_t *indices);
+ struct address_space *mapping, pgoff_t start, pgoff_t end,
+ unsigned nr_entries, pgoff_t *indices);
void pagevec_remove_exceptionals(struct pagevec *pvec);
unsigned pagevec_lookup_range(struct pagevec *pvec,
struct address_space *mapping,
--- a/mm/swap.c~mm-add-an-end-parameter-to-pagevec_lookup_entries
+++ a/mm/swap.c
@@ -1078,6 +1078,7 @@ void __pagevec_lru_add(struct pagevec *p
* @pvec: Where the resulting entries are placed
* @mapping: The address_space to search
* @start: The starting entry index
+ * @end: The highest index to return (inclusive).
* @nr_entries: The maximum number of pages
* @indices: The cache indices corresponding to the entries in @pvec
*
@@ -1098,11 +1099,10 @@ void __pagevec_lru_add(struct pagevec *p
* found.
*/
unsigned pagevec_lookup_entries(struct pagevec *pvec,
- struct address_space *mapping,
- pgoff_t start, unsigned nr_entries,
- pgoff_t *indices)
+ struct address_space *mapping, pgoff_t start, pgoff_t end,
+ unsigned nr_entries, pgoff_t *indices)
{
- pvec->nr = find_get_entries(mapping, start, ULONG_MAX, nr_entries,
+ pvec->nr = find_get_entries(mapping, start, end, nr_entries,
pvec->pages, indices);
return pagevec_count(pvec);
}
--- a/mm/truncate.c~mm-add-an-end-parameter-to-pagevec_lookup_entries
+++ a/mm/truncate.c
@@ -57,11 +57,10 @@ static void clear_shadow_entry(struct ad
* exceptional entries similar to what pagevec_remove_exceptionals does.
*/
static void truncate_exceptional_pvec_entries(struct address_space *mapping,
- struct pagevec *pvec, pgoff_t *indices,
- pgoff_t end)
+ struct pagevec *pvec, pgoff_t *indices)
{
int i, j;
- bool dax, lock;
+ bool dax;
/* Handled by shmem itself */
if (shmem_mapping(mapping))
@@ -75,8 +74,7 @@ static void truncate_exceptional_pvec_en
return;
dax = dax_mapping(mapping);
- lock = !dax && indices[j] < end;
- if (lock)
+ if (!dax)
xa_lock_irq(&mapping->i_pages);
for (i = j; i < pagevec_count(pvec); i++) {
@@ -88,9 +86,6 @@ static void truncate_exceptional_pvec_en
continue;
}
- if (index >= end)
- continue;
-
if (unlikely(dax)) {
dax_delete_mapping_entry(mapping, index);
continue;
@@ -99,7 +94,7 @@ static void truncate_exceptional_pvec_en
__clear_shadow_entry(mapping, index, page);
}
- if (lock)
+ if (!dax)
xa_unlock_irq(&mapping->i_pages);
pvec->nr = j;
}
@@ -329,7 +324,7 @@ void truncate_inode_pages_range(struct a
while (index < end && find_lock_entries(mapping, index, end - 1,
&pvec, indices)) {
index = indices[pagevec_count(&pvec) - 1] + 1;
- truncate_exceptional_pvec_entries(mapping, &pvec, indices, end);
+ truncate_exceptional_pvec_entries(mapping, &pvec, indices);
for (i = 0; i < pagevec_count(&pvec); i++)
truncate_cleanup_page(mapping, pvec.pages[i]);
delete_from_page_cache_batch(mapping, &pvec);
@@ -381,8 +376,8 @@ void truncate_inode_pages_range(struct a
index = start;
for ( ; ; ) {
cond_resched();
- if (!pagevec_lookup_entries(&pvec, mapping, index,
- min(end - index, (pgoff_t)PAGEVEC_SIZE), indices)) {
+ if (!pagevec_lookup_entries(&pvec, mapping, index, end - 1,
+ PAGEVEC_SIZE, indices)) {
/* If all gone from start onwards, we're done */
if (index == start)
break;
@@ -390,23 +385,12 @@ void truncate_inode_pages_range(struct a
index = start;
continue;
}
- if (index == start && indices[0] >= end) {
- /* All gone out of hole to be punched, we're done */
- pagevec_remove_exceptionals(&pvec);
- pagevec_release(&pvec);
- break;
- }
for (i = 0; i < pagevec_count(&pvec); i++) {
struct page *page = pvec.pages[i];
/* We rely upon deletion not changing page->index */
index = indices[i];
- if (index >= end) {
- /* Restart punch to make sure all gone */
- index = start - 1;
- break;
- }
if (xa_is_value(page))
continue;
@@ -417,7 +401,7 @@ void truncate_inode_pages_range(struct a
truncate_inode_page(mapping, page);
unlock_page(page);
}
- truncate_exceptional_pvec_entries(mapping, &pvec, indices, end);
+ truncate_exceptional_pvec_entries(mapping, &pvec, indices);
pagevec_release(&pvec);
index++;
}
@@ -513,8 +497,6 @@ static unsigned long __invalidate_mappin
/* We rely upon deletion not changing page->index */
index = indices[i];
- if (index > end)
- break;
if (xa_is_value(page)) {
invalidate_exceptional_entry(mapping, index,
@@ -650,16 +632,13 @@ int invalidate_inode_pages2_range(struct
pagevec_init(&pvec);
index = start;
- while (index <= end && pagevec_lookup_entries(&pvec, mapping, index,
- min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1,
- indices)) {
+ while (pagevec_lookup_entries(&pvec, mapping, index, end,
+ PAGEVEC_SIZE, indices)) {
for (i = 0; i < pagevec_count(&pvec); i++) {
struct page *page = pvec.pages[i];
/* We rely upon deletion not changing page->index */
index = indices[i];
- if (index > end)
- break;
if (xa_is_value(page)) {
if (!invalidate_exceptional_entry2(mapping,
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-fix-readahead_page_batch-for-retry-entries.patch
mm-fix-madvise-willneed-performance-problem.patch
mm-page-flags-fix-comment.patch
mm-page_alloc-add-__free_pages-documentation.patch
mm-make-pagecache-tagged-lookups-return-only-head-pages.patch
mm-shmem-use-pagevec_lookup-in-shmem_unlock_mapping.patch
mm-swap-optimise-get_shadow_from_swap_cache.patch
mm-add-fgp_entry.patch
mm-filemap-rename-find_get_entry-to-mapping_get_entry.patch
mm-filemap-add-helper-for-finding-pages.patch
mm-filemap-add-mapping_seek_hole_data.patch
iomap-use-mapping_seek_hole_data.patch
mm-add-and-use-find_lock_entries.patch
mm-add-an-end-parameter-to-find_get_entries.patch
mm-add-an-end-parameter-to-pagevec_lookup_entries.patch
mm-remove-nr_entries-parameter-from-pagevec_lookup_entries.patch
mm-pass-pvec-directly-to-find_get_entries.patch
mm-remove-pagevec_lookup_entries.patch
mm-truncateshmem-handle-truncates-that-split-thps.patch
mm-filemap-return-only-head-pages-from-find_get_entries.patch
mm-introduce-memfd_secret-system-call-to-create-secret-memory-areas-fix.patch
