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Tue, 3 Mar 2026 00:39:53 -0500 Received: (from bmarzins@localhost) by bmarzins-01.fast.eng.rdu2.dc.redhat.com (8.18.1/8.18.1/Submit) id 6235drsg1875430; Tue, 3 Mar 2026 00:39:53 -0500 Date: Tue, 3 Mar 2026 00:39:53 -0500 From: Benjamin Marzinski To: John Garry Cc: hch@lst.de, kbusch@kernel.org, sagi@grimberg.me, axboe@fb.com, martin.petersen@oracle.com, james.bottomley@hansenpartnership.com, hare@suse.com, jmeneghi@redhat.com, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, michael.christie@oracle.com, snitzer@kernel.org, dm-devel@lists.linux.dev, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 02/24] scsi-multipath: introduce basic SCSI device support Message-ID: References: <20260225153627.1032500-1-john.g.garry@oracle.com> <20260225153627.1032500-3-john.g.garry@oracle.com> <784abca8-9dc1-4fca-b72f-62d55b4cc3f1@oracle.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <784abca8-9dc1-4fca-b72f-62d55b4cc3f1@oracle.com> X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 On Mon, Mar 02, 2026 at 11:39:28AM +0000, John Garry wrote: > On 02/03/2026 02:22, Benjamin Marzinski wrote: > > > diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig > > > index 19d0884479a24..cfab7ad1e3c2c 100644 > > > --- a/drivers/scsi/Kconfig > > > +++ b/drivers/scsi/Kconfig > > > @@ -76,6 +76,16 @@ config SCSI_LIB_KUNIT_TEST > > > If unsure say N. > > > +config SCSI_MULTIPATH > > > + bool "SCSI multipath support" > > At least until this supports ALUA, it should probably be marked > > EXPERIMENTAL, just so people trying it out aren't surprised if it > > doesn't multipath their device in the way they expect. > > I think that ALUA support will be mainline acceptance criteria, and I am > looking to add it now. > > BTW, Hannes suggested to not use the DH ALUA support, so that means to > separate out the core ALUA support from the DH stuff. So you have any > opinion on that approach? I would (perhaps naively) have thought that the device handlers would be a useful abstraction for dealing with ALUA devices. But, Hannes knows this code much better than me. like I said before, I'm no scsi expert. -Ben > > Thanks!