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Date:   Mon, 24 Jun 2019 17:33:58 +0200
From:   Jan Kara <>
To:     "Darrick J. Wong" <>
Subject: Re: [PATCH 2/7] vfs: flush and wait for io when setting the
 immutable flag via SETFLAGS

On Fri 21-06-19 16:57:07, Darrick J. Wong wrote:
> +/*
> + * Flush file data before changing attributes.  Caller must hold any locks
> + * required to prevent further writes to this file until we're done setting
> + * flags.
> + */
> +static inline int inode_flush_data(struct inode *inode)
> +{
> +	inode_dio_wait(inode);
> +	return filemap_write_and_wait(inode->i_mapping);
> +}

BTW, how about calling this function inode_drain_writes() instead? The
'flush_data' part is more a detail of implementation of write draining than
what we need to do to set immutable flag.

Jan Kara <>

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