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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Message-ID: <CAGnHSEmtgGO5QjfamnN0VPOO2w-4GrZQvPnbkBVdtWBPTnLieA@mail.gmail.com>
Date:	Sun, 14 Aug 2016 17:34:18 +0800
From:	Tom Yan <tom.ty89@...il.com>
To:	Pavel Machek <pavel@....cz>
Cc:	kernel list <linux-kernel@...r.kernel.org>,
	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@...kum.org,
	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)]

Since when it is expected that SATA disks will always be probed before
USB disks? We can't guarantee that even if we make sure all ata
drivers are loaded before usb-storage/uas. That's why we need
consistent namings (e.g. /dev/disk/by-id/*).

On 14 August 2016 at 17:20, Pavel Machek <pavel@....cz> wrote:
> Hi!
>
>> It seems that in v4.8-rc0, /dev/sdX got reordered, and now USB devices
>> are probed before SATA drivers. That is pretty anti-social. It
>> broke my boot on my primary machine, and unfortunately due to BIOS
>> problems (keyboard does not work when connected through a hub) it is
>> less fun than it should be.
>
> If you know which commit caused the reordering, that would be helpful.
>
> v4.1 seems to be ok: SATA disk is sda, as expected.
>
> v4.4 seems to be ok: SATA disk is sda, as expected.
>
> I'll test v4.6 next.
>
> v4.8-rc1: SATA disk is sde, behind USB card readers. Not helpful.
>
> Best regards,
>                                                                         Pavel
> --
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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