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

From	Pavel Machek <pavel@ucw.cz>
Newsgroups	linux.kernel
Subject	Re: next_tick hang was Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot after cold boots, boots after reboot
Date	2017-02-23 15:30 +0100
Message-ID	<te2z7-2s9-13@gated-at.bofh.it> (permalink)
References	(5 earlier) <tbUcG-76j-11@gated-at.bofh.it> <tbVLs-7V6-15@gated-at.bofh.it> <tc9EK-5W-25@gated-at.bofh.it> <tdvtw-3w9-15@gated-at.bofh.it> <tdvtw-3w9-13@gated-at.bofh.it>
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On Wed 2017-02-22 04:08:58, Frederic Weisbecker wrote:
> On Sat, Feb 18, 2017 at 11:23:39AM +0100, Pavel Machek wrote:
> > On Sat 2017-02-18 10:39:17, Pavel Machek wrote:
> > > Hi!
> > > 
> > > [I droped some CCs here, you may want to check the CC list].
> > > 
> > > > > These are different bugs.
> > > > > 
> > > > > On x60, I see failures doing hotplug/unplug in a loop, or lot of
> > > > > suspends. Someone seen it in v4.8-stable etc. Old bug. Rare to hit.
> > > > > 
> > > > > Desktop machine was failing to boot, and had some fun with
> > > > > suspend/resume too. Boot hang was reproducible with right
> > > > > procedure. (Hard poweroff, cold boot.). That one was introduced in
> > > > > 4.10-rc cycle.
> > > > 
> > > > Pavel, is there any chance you could apply this patch on top of latest linus tree
> > > > and send me your resulting dmesg log? This has the two reverted patches plus some
> > > > debugging code. The amount of printk shouldn't be too big, I tested it home without
> > > > issue.
> > > > 
> > > > If you can't manage to dump the dmesg, please try to take a picture of your screen
> > > > so that I can see the last messages starting with "NEXT_TICK_READ".
> > > > 
> > > > Thanks!
> > > 
> > > I guess I can. But I'll only have one 80x25 screen to look at...
> > 
> > Ok, here it is.
> 
> Thanks, I haven't been able to deduce much though, except that the pending timer on CPU 0
> looks quite far away.
> 
> Could you please add "initcall_debug" in your kernel parameters to identify if we are blocking in
> a specific initcall? If so it should tell us which one.

Please see Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does
not boot after cold boots, boots after reboot thread. Hang was traced
down to the USB handoff code.
									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Thread

Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-14 19:10 +0100
  Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-14 20:30 +0100
    Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Alan Stern <stern@rowland.harvard.edu> - 2017-02-14 21:00 +0100
    Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Frederic Weisbecker <fweisbec@gmail.com> - 2017-02-23 17:30 +0100
      Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-23 19:50 +0100
        Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Frederic Weisbecker <fweisbec@gmail.com> - 2017-02-25 04:30 +0100
  Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-15 18:30 +0100
    Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-16 00:30 +0100
      Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Linus Torvalds <torvalds@linux-foundation.org> - 2017-02-16 00:40 +0100
        Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-16 12:20 +0100
          Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-16 18:30 +0100
            Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Frederic Weisbecker <fweisbec@gmail.com> - 2017-02-16 19:20 +0100
              Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Linus Torvalds <torvalds@linux-foundation.org> - 2017-02-16 19:30 +0100
                Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Frederic Weisbecker <fweisbec@gmail.com> - 2017-02-16 19:40 +0100
                Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Thomas Gleixner <tglx@linutronix.de> - 2017-02-16 20:40 +0100
                Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-16 21:10 +0100
                Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Linus Torvalds <torvalds@linux-foundation.org> - 2017-02-16 21:30 +0100
                Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-16 21:50 +0100
                Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-18 10:00 +0100
                Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-02-17 02:20 +0100
                Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Frederic Weisbecker <fweisbec@gmail.com> - 2017-02-17 15:10 +0100
                Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Thomas Gleixner <tglx@linutronix.de> - 2017-02-17 17:40 +0100
                Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-17 18:10 +0100
                Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Frederic Weisbecker <fweisbec@gmail.com> - 2017-02-17 19:50 +0100
                next_tick hang was Re: v4.10-rc8 (-rc6) boot regression on Intel  desktop, does not boot after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-18 10:40 +0100
                Re: next_tick hang was Re: v4.10-rc8 (-rc6) boot regression on Intel  desktop, does not boot after cold boots, boots after reboot Frederic Weisbecker <fweisbec@gmail.com> - 2017-02-18 16:00 +0100
                Re: next_tick hang was Re: v4.10-rc8 (-rc6) boot regression on Intel  desktop, does not boot after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-18 19:10 +0100
                Re: next_tick hang was Re: v4.10-rc8 (-rc6) boot regression on Intel  desktop, does not boot after cold boots, boots after reboot Frederic Weisbecker <fweisbec@gmail.com> - 2017-02-20 15:10 +0100
                Re: next_tick hang was Re: v4.10-rc8 (-rc6) boot regression on Intel  desktop, does not boot after cold boots, boots after reboot Frederic Weisbecker <fweisbec@gmail.com> - 2017-02-22 04:10 +0100
                Re: next_tick hang was Re: v4.10-rc8 (-rc6) boot regression on Intel  desktop, does not boot after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-23 15:30 +0100
            Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Pavel Machek <pavel@ucw.cz> - 2017-02-16 20:10 +0100
              Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot  after cold boots, boots after reboot Frederic Weisbecker <fweisbec@gmail.com> - 2017-02-17 15:50 +0100

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