Merge tag 'for-6.6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs updates from David Sterba:
 "No new features, the bulk of the changes are fixes, refactoring and
  cleanups. The notable fix is the scrub performance restoration after
  rewrite in 6.4, though still only partial.

  Fixes:

   - scrub performance drop due to rewrite in 6.4 partially restored:
      - do IO grouping by blg_plug/blk_unplug again
      - avoid unnecessary tree searches when processing stripes, in
        extent and checksum trees
      - the drop is noticeable on fast PCIe devices, -66% and restored
        to -33% of the original
      - backports to 6.4 planned

   - handle more corner cases of transaction commit during orphan
     cleanup or delayed ref processing

   - use correct fsid/metadata_uuid when validating super block

   - copy directory permissions and time when creating a stub subvolume

  Core:

   - debugging feature integrity checker deprecated, to be removed in
     6.7

   - in zoned mode, zones are activated just before the write, making
     error handling easier, now the overcommit mechanism can be enabled
     again which improves performance by avoiding more frequent flushing

   - v0 extent handling completely removed, deprecated long time ago

   - error handling improvements

   - tests:
      - extent buffer bitmap tests
      - pinned extent splitting tests

   - cleanups and refactoring:
      - compression writeback
      - extent buffer bitmap
      - space flushing, ENOSPC handling"

* tag 'for-6.6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (110 commits)
  btrfs: zoned: skip splitting and logical rewriting on pre-alloc write
  btrfs: tests: test invalid splitting when skipping pinned drop extent_map
  btrfs: tests: add a test for btrfs_add_extent_mapping
  btrfs: tests: add extent_map tests for dropping with odd layouts
  btrfs: scrub: move write back of repaired sectors to scrub_stripe_read_repair_worker()
  btrfs: scrub: don't go ordered workqueue for dev-replace
  btrfs: scrub: fix grouping of read IO
  btrfs: scrub: avoid unnecessary csum tree search preparing stripes
  btrfs: scrub: avoid unnecessary extent tree search preparing stripes
  btrfs: copy dir permission and time when creating a stub subvolume
  btrfs: remove pointless empty list check when reading delayed dir indexes
  btrfs: drop redundant check to use fs_devices::metadata_uuid
  btrfs: compare the correct fsid/metadata_uuid in btrfs_validate_super
  btrfs: use the correct superblock to compare fsid in btrfs_validate_super
  btrfs: simplify memcpy either of metadata_uuid or fsid
  btrfs: add a helper to read the superblock metadata_uuid
  btrfs: remove v0 extent handling
  btrfs: output extra debug info if we failed to find an inline backref
  btrfs: move the !zoned assert into run_delalloc_cow
  btrfs: consolidate the error handling in run_delalloc_nocow
  ...

1 files changed, 14 insertions, 35 deletions

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index d3f42009bb70..b8d3d7040a50 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1193,7 +1193,7 @@ static void wb_update_write_bandwidth(struct bdi_writeback *wb,
 	 * write_bandwidth = ---------------------------------------------------
 	 *                                          period
 	 *
-	 * @written may have decreased due to folio_account_redirty().
+	 * @written may have decreased due to folio_redirty_for_writepage().
 	 * Avoid underflowing @bw calculation.
 	 */
 	bw = written - min(written, wb->written_stamp);
@@ -2712,37 +2712,6 @@ bool filemap_dirty_folio(struct address_space *mapping, struct folio *folio)
 EXPORT_SYMBOL(filemap_dirty_folio);
 
 /**
- * folio_account_redirty - Manually account for redirtying a page.
- * @folio: The folio which is being redirtied.
- *
- * Most filesystems should call folio_redirty_for_writepage() instead
- * of this fuction.  If your filesystem is doing writeback outside the
- * context of a writeback_control(), it can call this when redirtying
- * a folio, to de-account the dirty counters (NR_DIRTIED, WB_DIRTIED,
- * tsk->nr_dirtied), so that they match the written counters (NR_WRITTEN,
- * WB_WRITTEN) in long term. The mismatches will lead to systematic errors
- * in balanced_dirty_ratelimit and the dirty pages position control.
- */
-void folio_account_redirty(struct folio *folio)
-{
-	struct address_space *mapping = folio->mapping;
-
-	if (mapping && mapping_can_writeback(mapping)) {
-		struct inode *inode = mapping->host;
-		struct bdi_writeback *wb;
-		struct wb_lock_cookie cookie = {};
-		long nr = folio_nr_pages(folio);
-
-		wb = unlocked_inode_to_wb_begin(inode, &cookie);
-		current->nr_dirtied -= nr;
-		node_stat_mod_folio(folio, NR_DIRTIED, -nr);
-		wb_stat_mod(wb, WB_DIRTIED, -nr);
-		unlocked_inode_to_wb_end(inode, &cookie);
-	}
-}
-EXPORT_SYMBOL(folio_account_redirty);
-
-/**
  * folio_redirty_for_writepage - Decline to write a dirty folio.
  * @wbc: The writeback control.
  * @folio: The folio.
@@ -2757,13 +2726,23 @@ EXPORT_SYMBOL(folio_account_redirty);
 bool folio_redirty_for_writepage(struct writeback_control *wbc,
 		struct folio *folio)
 {
-	bool ret;
+	struct address_space *mapping = folio->mapping;
 	long nr = folio_nr_pages(folio);
+	bool ret;
 
 	wbc->pages_skipped += nr;
-	ret = filemap_dirty_folio(folio->mapping, folio);
-	folio_account_redirty(folio);
+	ret = filemap_dirty_folio(mapping, folio);
+	if (mapping && mapping_can_writeback(mapping)) {
+		struct inode *inode = mapping->host;
+		struct bdi_writeback *wb;
+		struct wb_lock_cookie cookie = {};
 
+		wb = unlocked_inode_to_wb_begin(inode, &cookie);
+		current->nr_dirtied -= nr;
+		node_stat_mod_folio(folio, NR_DIRTIED, -nr);
+		wb_stat_mod(wb, WB_DIRTIED, -nr);
+		unlocked_inode_to_wb_end(inode, &cookie);
+	}
 	return ret;
 }
 EXPORT_SYMBOL(folio_redirty_for_writepage);