linux-ext4 - Re: [PATCH v2 2/3] fs: record I_DIRTY_TIME even if inode already has I_DIRTY

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Date:   Fri, 12 Aug 2022 11:20:36 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     Lukas Czerner <lczerner@...hat.com>
Cc:     linux-ext4@...r.kernel.org, jlayton@...nel.org, tytso@....edu,
        linux-fsdevel@...r.kernel.org, Dave Chinner <david@...morbit.com>,
        Christoph Hellwig <hch@...radead.org>, Jan Kara <jack@...e.cz>
Subject: Re: [PATCH v2 2/3] fs: record I_DIRTY_TIME even if inode already has
 I_DIRTY_INODE

On Fri, Aug 05, 2022 at 02:23:06PM +0200, Lukas Czerner wrote:
> > 
> > Also what is the precise meaning of the flags argument to ->dirty_inode now?
> > 
> > 	sb->s_op->dirty_inode(inode,
> > 			flags & (I_DIRTY_INODE | I_DIRTY_TIME));
> > 
> > Note that dirty_inode is documented in Documentation/filesystems/vfs.rst.
> 
> Don't know. It alredy don't mention I_DIRTY_SYNC that can be there as
> well.

Well, it didn't really need to because there were only two possibilities:
datasync and not datasync.  This patch changes that.

> Additionaly it can have I_DIRTY_TIME to inform the fs we have a
> dirty timestamp as well (in case of lazytime).

This is introduced by this patch.

- Eric