diff options
Diffstat (limited to 'fs/btrfs/subpage.c')
| -rw-r--r-- | fs/btrfs/subpage.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/fs/btrfs/subpage.c b/fs/btrfs/subpage.c index 56060acac2e9..2a9397be8116 100644 --- a/fs/btrfs/subpage.c +++ b/fs/btrfs/subpage.c @@ -359,6 +359,23 @@ void btrfs_subpage_set_dirty(const struct btrfs_fs_info *fs_info, folio_mark_dirty(folio); } +static void folio_clear_tags(struct folio *folio) +{ + struct address_space *mapping = folio_mapping(folio); + XA_STATE(xas, &mapping->i_pages, folio->index); + unsigned long flags; + + ASSERT(folio_test_locked(folio)); + ASSERT(mapping); + ASSERT(mapping_use_writeback_tags(mapping)); + + xas_lock_irqsave(&xas, flags); + xas_load(&xas); + xas_clear_mark(&xas, PAGECACHE_TAG_DIRTY); + xas_clear_mark(&xas, PAGECACHE_TAG_TOWRITE); + xas_unlock_irqrestore(&xas, flags); +} + /* * Extra clear_and_test function for subpage dirty bitmap. * @@ -403,7 +420,6 @@ void btrfs_subpage_set_writeback(const struct btrfs_fs_info *fs_info, unsigned int start_bit = subpage_calc_start_bit(fs_info, folio, writeback, start, len); unsigned long flags; - bool keep_write; spin_lock_irqsave(&bfs->lock, flags); bitmap_set(bfs->bitmaps, start_bit, len >> fs_info->sectorsize_bits); @@ -413,10 +429,14 @@ void btrfs_subpage_set_writeback(const struct btrfs_fs_info *fs_info, * folio. Doing so can cause WB_SYNC_ALL writepages() to overlook it, * assume writeback is complete, and exit too early — violating sync * ordering guarantees. + * + * Instead we manually clear the DIRTY and TOWRITE tags after the folio + * is no longer dirty. */ - keep_write = folio_test_dirty(folio); if (!folio_test_writeback(folio)) - __folio_start_writeback(folio, keep_write); + __folio_start_writeback(folio, true); + if (!folio_test_dirty(folio)) + folio_clear_tags(folio); spin_unlock_irqrestore(&bfs->lock, flags); } |