Re: [PATCH v3 04/17] f2fs: support atomic file large folios buffered write

[Chao Yu]

On 10/10/26 00:12, Nanzhe Zhao wrote:
> +	/* If index is beyond the end of file, reserve a new block in COW inode */
> +	if ((index << PAGE_SHIFT) >= i_size_read(inode))

Can you please check all "xxx << PAGE_SHIFT" statements in patchset to see if there
is overflow issue?

> +	if (f2fs_folio_may_unlock_balance_fs(folio, mapping, need_balance)) {
>   		folio_unlock(folio);
> -		f2fs_balance_fs(sbi, true);
> -		folio_lock(folio);
> -		if (folio->mapping != mapping) {
> -			/* The folio got truncated from under us */
> -			folio_unlock(folio);
> -			folio_put(folio);
> -			goto repeat;
> -		}
> +		folio_put(folio);

Then we can call f2fs_folio_put(, true) to clean up the codes?

>   	if (folio_test_large(folio)) {
> -		err = prepare_large_folio_write_begin(inode,
> +		if (f2fs_is_atomic_file(inode))
> +			err = prepare_large_folio_atomic_write_begin(inode,
> +					mapping, folio, pos, len);
> +		else
> +			err = prepare_large_folio_write_begin(inode,
>   					folio, pos, blen);

Same question as it in 03/17, can we relocate?

Thanks,