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Date:   Wed, 30 Mar 2022 02:18:50 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     Linus Torvalds <torvalds@linux-foundation.org>
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        Al Viro <viro@zeniv.linux.org.uk>,
        CIFS <linux-cifs@vger.kernel.org>,
        Namjae Jeon <linkinjeon@kernel.org>
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On Tue, Mar 29, 2022 at 07:23:19PM -0700, Linus Torvalds wrote:
> Hmm. The cachefiles and ecryptfs code seems to have a fair amount of
> this pattern.

Which is expected as those (plus nfsd) really are the major consumers
of doing the full set of file system namespace operations from kernel
space.