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Date: Wed, 19 Aug 2020 16:05:52 +0100
From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
To: linux-mm@...ck.org
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Hugh Dickins <hughd@...gle.com>,
William Kucharski <william.kucharski@...cle.com>,
Johannes Weiner <hannes@...xchg.org>, Jan Kara <jack@...e.cz>,
linux-kernel@...r.kernel.org
Subject: [PATCH 4/7] mm: Add an 'end' parameter to pagevec_lookup_entries
Simplifies the callers and uses the existing functionality of
find_get_entries().
Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
include/linux/pagevec.h | 5 ++---
mm/swap.c | 8 ++++----
mm/truncate.c | 36 ++++++++----------------------------
3 files changed, 14 insertions(+), 35 deletions(-)
diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h
index 081d934eda64..4b245592262c 100644
--- a/include/linux/pagevec.h
+++ b/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,
diff --git a/mm/swap.c b/mm/swap.c
index fcf6ccb94b09..b6e56a84b466 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -1036,6 +1036,7 @@ void __pagevec_lru_add(struct pagevec *pvec)
* @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
*
@@ -1056,11 +1057,10 @@ void __pagevec_lru_add(struct pagevec *pvec)
* 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);
}
diff --git a/mm/truncate.c b/mm/truncate.c
index dd9ebc1da356..9c617291fb1e 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -326,9 +326,8 @@ void truncate_inode_pages_range(struct address_space *mapping,
pagevec_init(&pvec);
index = start;
- while (index < end && pagevec_lookup_entries(&pvec, mapping, index,
- min(end - index, (pgoff_t)PAGEVEC_SIZE),
- indices)) {
+ while (pagevec_lookup_entries(&pvec, mapping, index, end - 1,
+ PAGEVEC_SIZE, indices)) {
/*
* Pagevec array has exceptional entries and we may also fail
* to lock some pages. So we store pages that can be deleted
@@ -342,8 +341,6 @@ void truncate_inode_pages_range(struct address_space *mapping,
/* We rely upon deletion not changing page->index */
index = indices[i];
- if (index >= end)
- break;
if (xa_is_value(page))
continue;
@@ -413,8 +410,8 @@ void truncate_inode_pages_range(struct address_space *mapping,
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;
@@ -422,23 +419,12 @@ void truncate_inode_pages_range(struct address_space *mapping,
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;
@@ -554,16 +540,13 @@ unsigned long invalidate_mapping_pages(struct address_space *mapping,
int i;
pagevec_init(&pvec);
- 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)) {
invalidate_exceptional_entry(mapping, index,
@@ -697,16 +680,13 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
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,
--
2.28.0
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