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From: John Meneghini <jmeneghi@redhat.com>
To: Sagi Grimberg <sagi@grimberg.me>, kbusch@kernel.org, hch@lst.de
Cc: bmarzins@redhat.com, Bryan Gurney <bgurney@redhat.com>,
	linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org,
	Marco Patalano <mpatalan@redhat.com>,
	axboe@kernel.dk
Subject: Re: [PATCH] nvme: remove multipath module parameter
Date: Mon, 17 Feb 2025 11:14:44 -0500	[thread overview]
Message-ID: <ea9537d5-721a-4b37-84d1-df797646fce2@redhat.com> (raw)
In-Reply-To: <ea0e6445-9770-4df9-91bd-80f44cd0388e@grimberg.me>


On 2/17/25 3:08 AM, Sagi Grimberg wrote:
>>
>> We plan to ship this patch with RHEL-10. So it would be really good if we could get this
>> change accepted and merged upstream, perhaps into v6.15.
> 
> Hey John,
> 
> This looks fine to me, I'm assuming this was also tested with CONFIG_NVME_MULTIPATH=n ?

Yes, everything has been tested with CONFIG_NVME_MULTIPATH both enabled (Y) and disabled (N).

As we discussed in the previous email thread[1] there is an anomaly seen when you build a kernel with CONFIG_NVME_MULTIPATH=n.
and the host discovers a multipath capable nvme device (CMIC/NMIC=1). You will see exactly the same thing that you do with
CONFIG_NVME_MULTIPATH=y when the nvme_core.multipath parameter is N. You see a separate /dev/nvmeNN entry for
every namespace/controller path.

We can send send a separate patch to address that problem, but this patch, which simply removes the nvme_core.multipath parameter
has beeen fully tested and is ready to go.

[1] https://lore.kernel.org/linux-nvme/58519c4e-5801-4481-9087-be4f19b218f7@redhat.com/

Please approve/merge this patch.

/John


  reply	other threads:[~2025-02-17 16:14 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-02-04 21:11 Bryan Gurney
2025-02-13 20:37 ` John Meneghini
2025-02-17  8:08   ` Sagi Grimberg
2025-02-17 16:14     ` John Meneghini [this message]
2025-02-18  8:19       ` Sagi Grimberg
2025-02-18 14:05         ` John Meneghini
2025-02-18 14:57           ` John Meneghini
2025-02-18 15:06   ` Keith Busch
2025-02-18 16:31     ` John Meneghini
2025-02-18 17:15       ` Keith Busch
2025-02-18 23:06         ` John Meneghini
2025-02-18 23:30           ` Keith Busch
2025-02-19 14:47         ` Nilay Shroff
2025-02-20 11:05           ` Sagi Grimberg
2025-02-20 16:47             ` Keith Busch
2025-02-26  9:55               ` Hannes Reinecke
2025-03-05 14:15                 ` Christoph Hellwig
2025-03-05 15:17                   ` Keith Busch
2025-03-05 23:51                     ` Christoph Hellwig
2025-03-05 23:57                       ` Keith Busch
2025-03-06  0:03                         ` Christoph Hellwig
2025-03-06  0:15                           ` Keith Busch
2025-03-06  7:12                           ` Hannes Reinecke
2025-03-06 14:18                             ` Christoph Hellwig
2025-03-06 15:01                               ` Keith Busch
2025-03-06 15:16                                 ` Christoph Hellwig
2025-03-07  0:46                                   ` Keith Busch
2025-03-07 15:19                                     ` Nilay Shroff
2025-03-07 15:43                                       ` Keith Busch
2025-03-09 17:23                                         ` Nilay Shroff
2025-03-10 13:29                                           ` Christoph Hellwig
2025-03-12  3:47                                           ` John Meneghini
2025-03-12 15:26                                             ` Nilay Shroff
2025-03-10 13:28                                     ` Christoph Hellwig
2025-03-12  3:08                 ` John Meneghini
2025-02-18 14:26 ` John Meneghini
2025-02-18 16:41   ` John Meneghini
2025-02-18 14:43 ` John Meneghini

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