linux-kernel - Re: Regression - SATA disks behind USB ones on v4.8-rc1, breaking boot. [Re: Who reordered my disks (probably v4.8-rc1 problem)]

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Date:	Sun, 14 Aug 2016 18:07:40 +0800
From:	Tom Yan <tom.ty89@...il.com>
To:	Pavel Machek <pavel@....cz>
Cc:	kernel list <linux-kernel@...r.kernel.org>,
	james harvey <jamespharvey20@...il.com>,
	regressions@...mhuis.info, hdegoede@...hat.com,
	Tejun Heo <tj@...nel.org>, linux-ide@...r.kernel.org,
	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	Oliver Neukum <oliver@...kum.org>,
	Alan Stern <stern@...land.harvard.edu>
Subject: Re: Regression - SATA disks behind USB ones on v4.8-rc1, breaking
 boot. [Re: Who reordered my disks (probably v4.8-rc1 problem)]

On 14 August 2016 at 18:01, Pavel Machek <pavel@....cz> wrote:
>
> Since SATA support was merged, certainly since v2.4, and from way
> before /dev/disk/by-id existed.

I have no idea how "SATA before USB" had been done in the past (if it
was ever a thing in the kernel), but that has not been the case since
at least v3.0 AFAIR.

>
> People may not run udev, and you can't use /dev/disk/by-id on kernel
> command line.
>

No, but you can always use root=PARTUUID=, that's built into the
kernel. (root=UUID= requires udev or so though).