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Date:   Fri, 17 Feb 2017 15:40:33 +0100
From:   Frederic Weisbecker <fweisbec@...il.com>
To:     Pavel Machek <pavel@....cz>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        wanpeng.li@...mail.com, peterz@...radead.org, riel@...hat.com,
        tglx@...utronix.de, stable@...nel.org,
        "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, Feb 16, 2017 at 08:06:04PM +0100, Pavel Machek wrote:
> 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.)

Do you still have the config that triggered this? I don't have much expectations
about reproducing, this has almost never worked for me, but at least I could narrow
down the context.

Thanks.

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