linux-kernel - Re: [PATCH v1] nvme: avoid race in shutdown namespace removal

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Message-ID: <20210830100443.b2zkdp4l3vi2gz42@carbon.lan>
Date:   Mon, 30 Aug 2021 12:04:43 +0200
From:   Daniel Wagner <dwagner@...e.de>
To:     linux-nvme@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, Hannes Reinecke <hare@...e.de>,
        Keith Busch <kbusch@...nel.org>
Subject: Re: [PATCH v1] nvme: avoid race in shutdown namespace removal

On Mon, Aug 30, 2021 at 11:36:18AM +0200, Daniel Wagner wrote:
> Though one thing I am not really sure how it interacts with
> nvme_init_ns_head() as we could be in running nvme_init_ns_head()
> after we have set last_path = true. I haven't really figured
> out yet what this would mean. Is this a real problem?

I suspect it will regress the very thing 5396fdac56d8 ("nvme: fix
refcounting imbalance when all paths are down") tried to fix.