On Mon, Dec 07, 2020 at 05:52:20PM +0800, Chao Yu wrote:
> diff --git a/Documentation/filesystems/f2fs.rst
> b/Documentation/filesystems/f2fs.rst
> index dae15c96e659..fd413d319e93 100644
> --- a/Documentation/filesystems/f2fs.rst
> +++ b/Documentation/filesystems/f2fs.rst
> @@ -268,6 +268,9 @@ compress_mode=%s Control file compression mode. This
> supports "fs" and "user"
> choosing the target file and the timing. The user can
> do manual
> compression/decompression on the compression enabled
> files using
> ioctls.
> +compress_cache Support to use address space of inner inode to
> cache
> + compressed block, in order to improve cache hit ratio
> of
> + random read.
What is an "inner inode"? Mount options should be understandable without
understanding filesystem implementation details.
> +const struct address_space_operations f2fs_compress_aops = {
> + .releasepage = f2fs_release_page,
> + .invalidatepage = f2fs_invalidate_page,
> +};
> +
> +struct address_space *COMPRESS_MAPPING(struct f2fs_sb_info *sbi)
> +{
> + return sbi->compress_inode->i_mapping;
> +}
> +
> +void invalidate_compress_page(struct f2fs_sb_info *sbi, block_t blkaddr)
> +{
> + if (!sbi->compress_inode)
> + return;
> + invalidate_mapping_pages(COMPRESS_MAPPING(sbi), blkaddr, blkaddr);
> +}
Global functions should have the "f2fs_" prefix.
- Eric
