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btrfs: update comment for btrfs_dirty_pages
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from the initial merge, which has several problems: - No holes check any more - No inline decision is made Update the out-of-date comment with more correct one.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 <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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1 changed files with 5 additions and 6 deletions
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@ -453,12 +453,11 @@ static void btrfs_drop_pages(struct page **pages, size_t num_pages)
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}
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/*
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* after copy_from_user, pages need to be dirtied and we need to make
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* sure holes are created between the current EOF and the start of
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* any next extents (if required).
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*
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* this also makes the decision about creating an inline extent vs
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* doing real data extents, marking pages dirty and delalloc as required.
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* After btrfs_copy_from_user(), update the following things for delalloc:
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* - Mark newly dirtied pages as DELALLOC in the io tree.
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* Used to advise which range is to be written back.
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* - Mark modified pages as Uptodate/Dirty and not needing COW fixup
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* - Update inode size for past EOF write
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*/
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int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
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size_t num_pages, loff_t pos, size_t write_bytes,
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