Re: [PATCH v1 05/12] f2fs: cache: use meta cache

[Wenjie Qi]

Hi Chao,

> struct f2fs_cached_block *f2fs_get_sum_cache(struct f2fs_sb_info *sbi,
> 		unsigned int segno)
> {
> 	if (unlikely(f2fs_cp_error(sbi)))
> 		return ERR_PTR(-EIO);
> 	return f2fs_get_meta_cache_retry(sbi, GET_SUM_BLOCK(sbi, segno));
> }
>
> entry = f2fs_get_sum_cache(sbi, GET_SUM_BLOCK(sbi, segno));

`f2fs_get_sum_cache()` applies `GET_SUM_BLOCK()` to its argument.  Its other
callers pass a logical segment number, while this packed-SSA path passes an
already translated value.

Is the argument contract of `f2fs_get_sum_cache()` a logical segment number
or an already translated block address?