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SubjectRe: [PATCH] f2fs: set dirty state for filesystem only when updating meta data
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On 2016/8/18 17:05, Chao Yu wrote:
> We don't guarantee integrity of user data after checkpoint, since we only
> guarantee meta data integrity for data consistency of filesystem.
>
> Due to above reason, we only need to set fs as dirty when meta data is
> updated, so that we can skip writing checkpoint in some case of non-meta
> data is updated.
>
> Signed-off-by: Chao Yu <yuchao0@huawei.com>
> ---
> fs/f2fs/f2fs.h | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index 5a10bce..1659d10 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -1220,7 +1220,9 @@ static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
> static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
> {
> percpu_counter_inc(&sbi->nr_pages[count_type]);
> - set_sbi_flag(sbi, SBI_IS_DIRTY);
> + if (count_type == F2FS_DIRTY_DENTS || count_type == F2FS_DIRTY_NODES ||
> + count_type == F2FS_DIRTY_META)

Sorry, I miss one condition here, please ignore this patch.

Thanks,

> + set_sbi_flag(sbi, SBI_IS_DIRTY);
> }
>
> static inline void inode_inc_dirty_pages(struct inode *inode)
>

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