The patch titled
Subject: btrfs: convert __process_pages_contig() to use filemap_get_folios_contig()
has been added to the -mm mm-unstable branch. Its filename is
btrfs-convert-__process_pages_contig-to-use-filemap_get_folios_contig.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/btrfs-convert-__process_pages_contig-to-use-filemap_get_folios_contig.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Vishal Moola (Oracle)" <vishal.moola@xxxxxxxxx>
Subject: btrfs: convert __process_pages_contig() to use filemap_get_folios_contig()
Date: Tue, 23 Aug 2022 17:40:18 -0700
Convert to use folios throughout. This is in preparation for the removal
of find_get_pages_contig(). Now also supports large folios.
Since we may receive more than nr_pages pages, nr_pages may underflow.
Since nr_pages > 0 is equivalent to index <= end_index, we replaced it
with this check instead.
Link: https://lkml.kernel.org/r/20220824004023.77310-3-vishal.moola@xxxxxxxxx
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
Acked-by: David Sterba <dsterba@xxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Chris Mason <clm@xxxxxx>
Cc: David Sterba <dsterb@xxxxxxxx>
Cc: Josef Bacik <josef@xxxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/extent_io.c | 33 +++++++++++++++------------------
1 file changed, 15 insertions(+), 18 deletions(-)
--- a/fs/btrfs/extent_io.c~btrfs-convert-__process_pages_contig-to-use-filemap_get_folios_contig
+++ a/fs/btrfs/extent_io.c
@@ -1900,9 +1900,8 @@ static int __process_pages_contig(struct
pgoff_t start_index = start >> PAGE_SHIFT;
pgoff_t end_index = end >> PAGE_SHIFT;
pgoff_t index = start_index;
- unsigned long nr_pages = end_index - start_index + 1;
unsigned long pages_processed = 0;
- struct page *pages[16];
+ struct folio_batch fbatch;
int err = 0;
int i;
@@ -1911,16 +1910,17 @@ static int __process_pages_contig(struct
ASSERT(processed_end && *processed_end == start);
}
- if ((page_ops & PAGE_SET_ERROR) && nr_pages > 0)
+ if ((page_ops & PAGE_SET_ERROR) && start_index <= end_index)
mapping_set_error(mapping, -EIO);
- while (nr_pages > 0) {
- int found_pages;
+ folio_batch_init(&fbatch);
+ while (index <= end_index) {
+ int found_folios;
- found_pages = find_get_pages_contig(mapping, index,
- min_t(unsigned long,
- nr_pages, ARRAY_SIZE(pages)), pages);
- if (found_pages == 0) {
+ found_folios = filemap_get_folios_contig(mapping, &index,
+ end_index, &fbatch);
+
+ if (found_folios == 0) {
/*
* Only if we're going to lock these pages, we can find
* nothing at @index.
@@ -1930,23 +1930,20 @@ static int __process_pages_contig(struct
goto out;
}
- for (i = 0; i < found_pages; i++) {
+ for (i = 0; i < found_folios; i++) {
int process_ret;
-
+ struct folio *folio = fbatch.folios[i];
process_ret = process_one_page(fs_info, mapping,
- pages[i], locked_page, page_ops,
+ &folio->page, locked_page, page_ops,
start, end);
if (process_ret < 0) {
- for (; i < found_pages; i++)
- put_page(pages[i]);
err = -EAGAIN;
+ folio_batch_release(&fbatch);
goto out;
}
- put_page(pages[i]);
- pages_processed++;
+ pages_processed += folio_nr_pages(folio);
}
- nr_pages -= found_pages;
- index += found_pages;
+ folio_batch_release(&fbatch);
cond_resched();
}
out:
_
Patches currently in -mm which might be from vishal.moola@xxxxxxxxx are
filemap-add-filemap_get_folios_contig.patch
btrfs-convert-__process_pages_contig-to-use-filemap_get_folios_contig.patch
btrfs-convert-end_compressed_writeback-to-use-filemap_get_folios.patch
btrfs-convert-process_page_range-to-use-filemap_get_folios_contig.patch
nilfs2-convert-nilfs_find_uncommited_extent-to-use-filemap_get_folios_contig.patch
ramfs-convert-ramfs_nommu_get_unmapped_area-to-use-filemap_get_folios_contig.patch
filemap-remove-find_get_pages_contig.patch
