linux-kernel - Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot after cold boots, boots after reboot

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Message-ID: <20170216190603.GA16029@amd>
Date:   Thu, 16 Feb 2017 20:06:04 +0100
From:   Pavel Machek <pavel@....cz>
To:     Linus Torvalds <torvalds@...ux-foundation.org>, fweisbec@...il.com,
        wanpeng.li@...mail.com, peterz@...radead.org, riel@...hat.com,
        tglx@...utronix.de, stable@...nel.org
Cc:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        USB list <linux-usb@...r.kernel.org>
Subject: Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot
 after cold boots, boots after reboot

On Thu 2017-02-16 18:25:35, Pavel Machek wrote:
> Hi!
> 
> > > > 4.10-rc4 broken
> > > > 4.10-rc3 ok
> > > 
> > > Hmm. If those actually end up being reliable, then there's not a whole
> > > lot in between them wrt PCI or USB.
> > > 
> > > What looked like the most likely candidate seems to be xhci-specific, though.
> > > 
> > > But maybe it's something that isn't directly in drivers/{pci,usb}/ and
> > > just interacts badly.
> > 
> > Ok. I _hope_ my tests are ok. Bisect log so far is:
> 
> And the winner is:
> 
> pavel@...f:/data/l/linux$ git bisect bad
> 24b91e360ef521a2808771633d76ebc68bd5604b is the first bad commit
> commit 24b91e360ef521a2808771633d76ebc68bd5604b
> Author: Frederic Weisbecker <fweisbec@...il.com>
> Date:   Wed Jan 4 15:12:04 2017 +0100
> 
>     nohz: Fix collision between tick and other hrtimers
>     

I had to revert 7bdb59f1ad474bd7161adc8f923cdef10f2638d1, too,
otherwise -rc8 does not compile.

With 24b91e360ef521a28087716 and 7bdb59f1ad474 reverted, it seems to
boot ok. (I did few tries.)

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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