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From: Keith Busch <keith.busch@gmail.com>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Daniel Drake <drake@endlessm.com>, Jens Axboe <axboe@kernel.dk>,
	Sagi Grimberg <sagi@grimberg.me>,
	Linux PCI <linux-pci@vger.kernel.org>,
	linux-nvme <linux-nvme@lists.infradead.org>,
	Keith Busch <kbusch@kernel.org>,
	linux-ide@vger.kernel.org,
	Linux Upstreaming Team <linux@endlessm.com>,
	Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH] PCI: Add Intel remapped NVMe device support
Date: Fri, 14 Jun 2019 15:05:54 -0600
Message-ID: <CAOSXXT7eV4SBSkoKoOKAPaUQxczrD3rAvpz=12LTQenvRjCYRw@mail.gmail.com> (raw)
In-Reply-To: <20190614200557.GS13533@google.com>

On Fri, Jun 14, 2019 at 2:06 PM Bjorn Helgaas <helgaas@kernel.org> wrote:
> Ugh.  Are you saying the installation instructions for Linux will say
> "change the BIOS setting to AHCI"?  That's an unpleasant user
> experience, especially if the installation fails if the user hasn't
> read the instructions.

:) That is essentially what the dmesg currently says when Linux
detects this, from drivers/ata/ahci.c:ahci_remap_check()

  "Switch your BIOS from RAID to AHCI mode to use them (remapped NVMe devices)"

Unpleasant yes, but what's the lesser of two evils? Recommend the
supported full featured mode, or try to support with degraded
capabilities?

  reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-10  7:44 Daniel Drake
2019-06-10 16:00 ` Keith Busch
2019-06-11  2:46   ` Daniel Drake
2019-06-12 14:32     ` Keith Busch
2019-06-13  8:54       ` Christoph Hellwig
2019-06-14  2:26         ` Daniel Drake
2019-06-14 19:36           ` Keith Busch
2019-06-14 20:05             ` Bjorn Helgaas
2019-06-14 21:05               ` Keith Busch [this message]
2019-06-18  7:48                 ` Hannes Reinecke
2019-06-18  7:46           ` Hannes Reinecke
2019-06-18  8:06             ` Daniel Drake
2019-06-18 15:15               ` Hannes Reinecke
2019-06-19 13:52                 ` Bjorn Helgaas
2019-06-10 21:16 ` Bjorn Helgaas
2019-06-11  3:25   ` Daniel Drake
2019-06-11 19:52     ` Bjorn Helgaas
2019-06-12  3:16       ` Daniel Drake
2019-06-12 13:49         ` Bjorn Helgaas

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