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Date:   Mon, 15 Nov 2021 21:22:20 -0800
From:   Christoph Hellwig <hch@infradead.org>
To:     Jubin Zhong <zhongjubin@huawei.com>
Cc:     hch@infradead.org, kechengsong@huawei.com,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        viro@zeniv.linux.org.uk, wangfangpeng1@huawei.com
Subject: Re: [PATCH] fs: Fix truncate never updates m/ctime
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On Tue, Nov 16, 2021 at 11:58:10AM +0800, Jubin Zhong wrote:
> I work on embedded devices so concern about jffs2/yaffs2/ubifs the most. 
> If there are any errors in my test program please let me know.

It seems like you need to fix jffs2 to implement the proper semantics
in its ->setattr.