linux-kernel - Re: [PATCH] xfs: fix BUG_ON in xfs

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Date:   Mon, 27 Mar 2023 18:47:54 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     "Darrick J. Wong" <djwong@...nel.org>
Cc:     "yebin (H)" <yebin10@...wei.com>, Ye Bin <yebin@...weicloud.com>,
        linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH] xfs: fix BUG_ON in xfs_getbmap()

On Mon, Mar 27, 2023 at 06:43:28PM -0700, Darrick J. Wong wrote:
> <shrug> Seeing as the data fork mappings can change the instant the
> ILOCK drops, I'm not /that/ worried about users seeing a delalloc
> mapping even if the user requested a flush.  The results are already
> obsolete when they get to userspace, unless the application software has
> found another means to lock out access to the file.

That is true, but then again the users asked to not see delalloc
mappings, so we really shouldn't report one, right?