linux-kernel - Re: [RFC PATCH v5 09/10] fs: introduce new helper sync_fs_and

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Message-ID: <17d2365388e.10ca295a42584.1997095568982277851@mykernel.net>
Date:   Mon, 15 Nov 2021 19:39:35 +0800
From:   Chengguang Xu <cgxu519@...ernel.net>
To:     "Amir Goldstein" <amir73il@...il.com>
Cc:     "Miklos Szeredi" <miklos@...redi.hu>, "Jan Kara" <jack@...e.cz>,
        "linux-fsdevel" <linux-fsdevel@...r.kernel.org>,
        "overlayfs" <linux-unionfs@...r.kernel.org>,
        "linux-kernel" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH v5 09/10] fs: introduce new helper
 sync_fs_and_blockdev()


 ---- 在 星期二, 2021-10-19 15:15:28 Amir Goldstein <amir73il@...il.com> 撰写 ----
 > On Thu, Sep 23, 2021 at 4:08 PM Chengguang Xu <cgxu519@...ernel.net> wrote:
 > >
 > > Overlayfs needs to call upper layer's ->sync_fs
 > > and __sync_blockdev() to sync metadata during syncfs(2).
 > >
 > > Currently, __sync_blockdev() does not export to module
 > > so introduce new helper sync_fs_and_blockdev() to wrap
 > > those operations.
 > 
 > Heads up: looks like __sync_blockdev() will be gone soon,
 > but you will have other exported symbols that overlayfs can use
 > 
 > https://lore.kernel.org/linux-fsdevel/20211019062530.2174626-1-hch@lst.de/T/
 > 

Hi Amir,

Thanks for the information.

Chengguang,