| Message ID | 20210310090833.105015-15-wqu@suse.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | btrfs: support read-write for subpage metadata | expand |
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 74525ebf2b83..18730d3ab50f 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -3937,7 +3937,13 @@ static noinline_for_stack int lock_extent_buffer_for_io(struct extent_buffer *eb btrfs_tree_unlock(eb); - if (!ret) + /* + * Either we don't need to submit any tree block, or we're submitting + * subpage. + * Subpage metadata doesn't use page locking at all, so we can skip + * the page locking. + */ + if (!ret || fs_info->sectorsize < PAGE_SIZE) return ret; num_pages = num_extent_pages(eb);
For subpage metadata, we don't use page locking at all. So just skip the page locking part for subpage. All the remaining routine can be reused. Signed-off-by: Qu Wenruo <wqu@suse.com> --- fs/btrfs/extent_io.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)