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Date: Thu, 17 Sep 2026 16:32:18 +0800
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Cc: chao@kernel.org, Barry Song <baohua@kernel.org>,
 Juan Yescas <jyescas@google.com>, Dev Jain <Dev.Jain@arm.com>,
 linux-kernel@vger.kernel.org, David Hildenbrand <David.Hildenbrand@arm.com>,
 Bo Zhang <zhangbo56@xiaomi.com>, Kalesh Singh <kaleshsingh@google.com>,
 Nanzhe Zhao <nzzhao@126.com>, Pengfei Li <lipengfei28@xiaomi.com>,
 Ryan Roberts <Ryan.Roberts@arm.com>
Subject: Re: [PATCH v2 10/14] f2fs: handle partial truncate of large folio
 dirty subpages
To: Nanzhe Zhao <zhaonanzhe@xiaomi.com>,
 linux-f2fs-devel@lists.sourceforge.net, Jaegeuk Kim <jaegeuk@kernel.org>
References: <20260915041909.2903887-1-zhaonanzhe@xiaomi.com>
 <20260915041909.2903887-11-zhaonanzhe@xiaomi.com>
Content-Language: en-US
From: Chao Yu <chao@kernel.org>
In-Reply-To: <20260915041909.2903887-11-zhaonanzhe@xiaomi.com>
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On 9/15/26 12:19, Nanzhe Zhao wrote:
> @@ -3545,6 +3573,14 @@ static int f2fs_write_single_data_folio(struct folio *folio, int *submitted,
>  
>  		fio.old_blkaddr = dn.data_blkaddr;
>  
> +		/* This page is already truncated */
> +		if (fio.old_blkaddr == NULL_ADDR) {
> +			ffs_clear_subrange_uptodate(folio,
> +					i << PAGE_SHIFT, PAGE_SIZE);

(unsigned long long)i << PAGE_SHIFT

Thanks,