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| author | Qu Wenruo <wqu@suse.com> | 2021-03-25 15:14:41 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2021-04-19 17:25:18 +0200 |
| commit | 1e5eb3d6a443d0271a5bb798e1bc94d549895efe (patch) | |
| tree | 0f7da228fa00dbcdb490964f65c09e6c0d9b8978 /fs/btrfs | |
| parent | eca0f6f64349c412695315490c30cda1622fba9f (diff) | |
| download | linux-1e5eb3d6a443d0271a5bb798e1bc94d549895efe.tar.gz | |
btrfs: make alloc_extent_buffer() check subpage dirty bitmap
In alloc_extent_buffer(), we make sure that the newly allocated page is never dirty. This is fine for sector size == PAGE_SIZE case, but for subpage it's possible that one extent buffer in the page is dirty, thus the whole page is marked dirty, and could cause false alert. To support subpage, call btrfs_page_test_dirty() to handle both cases. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/extent_io.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 7ad2169e7487..7c195d8dc07b 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -5665,7 +5665,7 @@ struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info, btrfs_page_inc_eb_refs(fs_info, p); spin_unlock(&mapping->private_lock); - WARN_ON(PageDirty(p)); + WARN_ON(btrfs_page_test_dirty(fs_info, p, eb->start, eb->len)); eb->pages[i] = p; if (!PageUptodate(p)) uptodate = 0; |