[PATCH v5 08/23] ceph: Convert ceph_writepages_start() to use filemap_get_folios_tag()

Vishal Moola (Oracle)
2023-01-04T21:16:16Z

Convert function to use a folio_batch instead of pagevec. This is in
preparation for the removal of find_get_pages_range_tag().

Also some minor renaming for consistency.

Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Acked-by: Jeff Layton <jlayton@kernel.org>
---
fs/ceph/addr.c | 58 ++++++++++++++++++++++++++------------------------
1 file changed, 30 insertions(+), 28 deletions(-)

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 8c74871e37c9..905268bf9741 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -792,7 +792,7 @@ static int ceph_writepages_start(struct address_space *mapping,
struct ceph_vino vino = ceph_vino(inode);
pgoff_t index, start_index, end = -1;
struct ceph_snap_context *snapc = NULL, *last_snapc = NULL, *pgsnapc;
- struct pagevec pvec;
+ struct folio_batch fbatch;
int rc = 0;
unsigned int wsize = i_blocksize(inode);
struct ceph_osd_request *req = NULL;
@@ -821,7 +821,7 @@ static int ceph_writepages_start(struct address_space *mapping,
if (fsc->mount_options->wsize < wsize)
wsize = fsc->mount_options->wsize;

- pagevec_init(&pvec);
+ folio_batch_init(&fbatch);

start_index = wbc->range_cyclic ? mapping->writeback_index : 0;
index = start_index;
@@ -869,7 +869,7 @@ static int ceph_writepages_start(struct address_space *mapping,

while (!done && index <= end) {
int num_ops = 0, op_idx;
- unsigned i, pvec_pages, max_pages, locked_pages = 0;
+ unsigned i, nr_folios, max_pages, locked_pages = 0;
struct page **pages = NULL, **data_pages;
struct page *page;
pgoff_t strip_unit_end = 0;
@@ -879,13 +879,13 @@ static int ceph_writepages_start(struct address_space *mapping,
max_pages = wsize >> PAGE_SHIFT;

get_more_pages:
- pvec_pages = pagevec_lookup_range_tag(&pvec, mapping, &index,
- end, PAGECACHE_TAG_DIRTY);
- dout("pagevec_lookup_range_tag got %d\n", pvec_pages);
- if (!pvec_pages && !locked_pages)
+ nr_folios = filemap_get_folios_tag(mapping, &index,
+ end, PAGECACHE_TAG_DIRTY, &fbatch);
+ dout("pagevec_lookup_range_tag got %d\n", nr_folios);
+ if (!nr_folios && !locked_pages)
break;
- for (i = 0; i < pvec_pages && locked_pages < max_pages; i++) {
- page = pvec.pages[i];
+ for (i = 0; i < nr_folios && locked_pages < max_pages; i++) {
+ page = &fbatch.folios[i]->page;
dout("? %p idx %lu\n", page, page->index);
if (locked_pages == 0)
lock_page(page); /* first page */
@@ -995,7 +995,7 @@ static int ceph_writepages_start(struct address_space *mapping,
len = 0;
}

- /* note position of first page in pvec */
+ /* note position of first page in fbatch */
dout("%p will write page %p idx %lu\n",
inode, page, page->index);

@@ -1005,30 +1005,30 @@ static int ceph_writepages_start(struct address_space *mapping,
fsc->write_congested = true;

pages[locked_pages++] = page;
- pvec.pages[i] = NULL;
+ fbatch.folios[i] = NULL;

len += thp_size(page);
}

/* did we get anything? */
if (!locked_pages)
- goto release_pvec_pages;
+ goto release_folios;
if (i) {
unsigned j, n = 0;
- /* shift unused page to beginning of pvec */
- for (j = 0; j < pvec_pages; j++) {
- if (!pvec.pages[j])
+ /* shift unused page to beginning of fbatch */
+ for (j = 0; j < nr_folios; j++) {
+ if (!fbatch.folios[j])
continue;
if (n < j)
- pvec.pages[n] = pvec.pages[j];
+ fbatch.folios[n] = fbatch.folios[j];
n++;
}
- pvec.nr = n;
+ fbatch.nr = n;

- if (pvec_pages && i == pvec_pages &&
+ if (nr_folios && i == nr_folios &&
locked_pages < max_pages) {
- dout("reached end pvec, trying for more\n");
- pagevec_release(&pvec);
+ dout("reached end fbatch, trying for more\n");
+ folio_batch_release(&fbatch);
goto get_more_pages;
}
}
@@ -1164,10 +1164,10 @@ static int ceph_writepages_start(struct address_space *mapping,
if (wbc->nr_to_write <= 0 && wbc->sync_mode == WB_SYNC_NONE)
done = true;

-release_pvec_pages:
- dout("pagevec_release on %d pages (%p)\n", (int)pvec.nr,
- pvec.nr ? pvec.pages[0] : NULL);
- pagevec_release(&pvec);
+release_folios:
+ dout("folio_batch release on %d folios (%p)\n", (int)fbatch.nr,
+ fbatch.nr ? fbatch.folios[0] : NULL);
+ folio_batch_release(&fbatch);
}

if (should_loop && !done) {
@@ -1184,15 +1184,17 @@ static int ceph_writepages_start(struct address_space *mapping,
unsigned i, nr;
index = 0;
while ((index <= end) &&
- (nr = pagevec_lookup_tag(&pvec, mapping, &index,
- PAGECACHE_TAG_WRITEBACK))) {
+ (nr = filemap_get_folios_tag(mapping, &index,
+ (pgoff_t)-1,
+ PAGECACHE_TAG_WRITEBACK,
+ &fbatch))) {
for (i = 0; i < nr; i++) {
- page = pvec.pages[i];
+ page = &fbatch.folios[i]->page;
if (page_snap_context(page) != snapc)
continue;
wait_on_page_writeback(page);