linux-kernel - Re: [PATCH v2 2/5] f2fs: expand f2fs_invalidate_compress_page() to f2fs_invalidate_compress_pages

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Message-ID: <036ed265-23c1-4a16-a1bb-452b90e8cf1f@kernel.org>
Date: Thu, 31 Oct 2024 15:26:41 +0800
From: Chao Yu <chao@...nel.org>
To: Yi Sun <yi.sun@...soc.com>, jaegeuk@...nel.org
Cc: Chao Yu <chao@...nel.org>, sunyibuaa@...il.com,
 linux-f2fs-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
 niuzhiguo84@...il.com, hao_hao.wang@...soc.com, ke.wang@...soc.com
Subject: Re: [PATCH v2 2/5] f2fs: expand f2fs_invalidate_compress_page() to
 f2fs_invalidate_compress_pages_range()

On 2024/10/30 18:31, Yi Sun wrote:
> New function f2fs_invalidate_compress_pages_range() adds the @len
> parameter. So it can process some consecutive blocks at a time.
> 
> Signed-off-by: Yi Sun <yi.sun@...soc.com>
> ---
>   fs/f2fs/compress.c | 7 ++++---
>   fs/f2fs/f2fs.h     | 9 +++++----
>   2 files changed, 9 insertions(+), 7 deletions(-)
> 
> diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
> index 7f26440e8595..e607a7885b57 100644
> --- a/fs/f2fs/compress.c
> +++ b/fs/f2fs/compress.c
> @@ -1903,11 +1903,12 @@ struct address_space *COMPRESS_MAPPING(struct f2fs_sb_info *sbi)
>   	return sbi->compress_inode->i_mapping;
>   }
>   
> -void f2fs_invalidate_compress_page(struct f2fs_sb_info *sbi, block_t blkaddr)
> +void f2fs_invalidate_compress_pages_range(struct f2fs_sb_info *sbi,
> +				block_t blkaddr, unsigned int len)
>   {
> -	if (!sbi->compress_inode)
> +	if (!sbi->compress_inode || len == 0)

We can remove len == 0 check condition? Or any caller can pass 0 here?

Thanks,

>   		return;
> -	invalidate_mapping_pages(COMPRESS_MAPPING(sbi), blkaddr, blkaddr);
> +	invalidate_mapping_pages(COMPRESS_MAPPING(sbi), blkaddr, blkaddr + len - 1);
>   }
>   
>   void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page,
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index 3c6f3cce5779..d3fe66a93a56 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -4384,7 +4384,8 @@ void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi);
>   int __init f2fs_init_compress_cache(void);
>   void f2fs_destroy_compress_cache(void);
>   struct address_space *COMPRESS_MAPPING(struct f2fs_sb_info *sbi);
> -void f2fs_invalidate_compress_page(struct f2fs_sb_info *sbi, block_t blkaddr);
> +void f2fs_invalidate_compress_pages_range(struct f2fs_sb_info *sbi,
> +					block_t blkaddr, unsigned int len);
>   void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page,
>   						nid_t ino, block_t blkaddr);
>   bool f2fs_load_compressed_page(struct f2fs_sb_info *sbi, struct page *page,
> @@ -4439,8 +4440,8 @@ static inline int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) { return
>   static inline void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi) { }
>   static inline int __init f2fs_init_compress_cache(void) { return 0; }
>   static inline void f2fs_destroy_compress_cache(void) { }
> -static inline void f2fs_invalidate_compress_page(struct f2fs_sb_info *sbi,
> -				block_t blkaddr) { }
> +static inline void f2fs_invalidate_compress_pages_range(struct f2fs_sb_info *sbi,
> +				block_t blkaddr, unsigned int len) { }
>   static inline void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi,
>   				struct page *page, nid_t ino, block_t blkaddr) { }
>   static inline bool f2fs_load_compressed_page(struct f2fs_sb_info *sbi,
> @@ -4759,7 +4760,7 @@ static inline void f2fs_invalidate_internal_cache(struct f2fs_sb_info *sbi,
>   								block_t blkaddr)
>   {
>   	f2fs_truncate_meta_inode_pages(sbi, blkaddr, 1);
> -	f2fs_invalidate_compress_page(sbi, blkaddr);
> +	f2fs_invalidate_compress_pages_range(sbi, blkaddr, 1);
>   }
>   
>   #define EFSBADCRC	EBADMSG		/* Bad CRC detected */