[PATCH v3 03/22] btrfs: file: update comment for btrfs_dirty_pages()
From: Qu Wenruo <hidden>
Date: 2021-01-06 01:03:10
Subsystem:
btrfs file system, filesystems (vfs and infrastructure), the rest · Maintainers:
Chris Mason, David Sterba, Alexander Viro, Christian Brauner, Linus Torvalds
The original comment is from the initial merge, which has several problems: - No holes check any more - No inline decision is made Update the out-of-date comment with more correct one. Signed-off-by: Qu Wenruo <redacted> --- fs/btrfs/file.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index e65223e3510d..1602975ddb88 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c@@ -453,12 +453,11 @@ static void btrfs_drop_pages(struct page **pages, size_t num_pages) } /* - * after copy_from_user, pages need to be dirtied and we need to make - * sure holes are created between the current EOF and the start of - * any next extents (if required). - * - * this also makes the decision about creating an inline extent vs - * doing real data extents, marking pages dirty and delalloc as required. + * After btrfs_copy_from_user(), update the following things for delalloc: + * - Mark newly dirtied pages as DELALLOC in the io tree. + * Used to advise which range is to be written back. + * - Marks modified pages as Uptodate/Dirty and not needing cowfixup + * - Update inode size for past EOF write. */ int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages, size_t num_pages, loff_t pos, size_t write_bytes,
--
2.29.2