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Date:   Tue, 11 Jul 2023 09:33:21 -0600
From:   Keith Busch <kbusch@kernel.org>
To:     Christoph Hellwig <hch@lst.de>
Cc:     Linux regressions mailing list <regressions@lists.linux.dev>,
        Pankaj Raghav <p.raghav@samsung.com>,
        Bagas Sanjaya <bagasdotme@gmail.com>,
        Jens Axboe <axboe@kernel.dk>, Sagi Grimberg <sagi@grimberg.me>,
        "Clemens S." <cspringsguth@gmail.com>,
        Martin Belanger <martin.belanger@dell.com>,
        Chaitanya Kulkarni <kch@nvidia.com>,
        John Meneghini <jmeneghi@redhat.com>,
        Hannes Reinecke <hare@suse.de>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux NVMe <linux-nvme@lists.infradead.org>,
        Kanchan Joshi <joshi.k@samsung.com>,
        Javier Gonzalez <javier.gonz@samsung.com>,
        =?utf-8?B?67CV7KeE7ZmY?= <jh.i.park@samsung.com>,
        Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: Fwd: Need NVME QUIRK BOGUS for SAMSUNG MZ1WV480HCGL-000MV
 (Samsung SM-953 Datacenter SSD)
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On Tue, Jul 11, 2023 at 02:06:09PM +0200, Christoph Hellwig wrote:
> On Tue, Jul 11, 2023 at 11:39:11AM +0200, Linux regression tracking (Thorsten Leemhuis) wrote:
> > Well, that "They keep pumping out more and more devices with the same
> > breakage" and the "new device" comment from Pankaj below bear the
> > question: should we stop trying to play "whack a mole" with all those
> > quirk entries and handle devices with duplicate ids just like Windows does?
> 
> As far as I can tell Windows completely ignores the IDs.  Which, looking
> back, I'd love to be able to do as well, but they are already used
> by udev for the /dev/disk/by-id/ links.   Those are usually not used
> on desktop systems, as they use the file system labels and UUIDs, but
> that doesn't work for non-file system uses.

It's also an inescapable requirement for supporting multipath, and a
number of the devices being quirked bizarrely also report CMIC/NMIC
capabilities.