linux-kernel - Re: [PATCH] nvme: remove multipath module parameter

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Message-ID: <20250306141837.GA21353@lst.de>
Date: Thu, 6 Mar 2025 15:18:37 +0100
From: Christoph Hellwig <hch@....de>
To: Hannes Reinecke <hare@...e.de>
Cc: Christoph Hellwig <hch@....de>, Keith Busch <kbusch@...nel.org>,
	Sagi Grimberg <sagi@...mberg.me>,
	Nilay Shroff <nilay@...ux.ibm.com>,
	John Meneghini <jmeneghi@...hat.com>, bmarzins@...hat.com,
	Bryan Gurney <bgurney@...hat.com>, linux-nvme@...ts.infradead.org,
	linux-kernel@...r.kernel.org, Marco Patalano <mpatalan@...hat.com>,
	axboe@...nel.dk
Subject: Re: [PATCH] nvme: remove multipath module parameter

On Thu, Mar 06, 2025 at 08:12:03AM +0100, Hannes Reinecke wrote:
> Single ported.
> There is a range of Samsung NVMe where one is a normal, single ported,
> NVMe, and one with a nearly identical model number reporting CMIC.
>
> Causing _quite_ a lot of confusion with the customer (and L3) when
> used under MD, as for the first hotplug works, for the second ... not so 
> much.

If the device is indeed entirely single ported and Samsung can confirm
the setting is incorret and not easily fixable by a firmware update
we can quirk it.