RE: linux-next boots then hangs...

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Hi, Mike

Thanks for the reply.
We first need you and Martin to register on the kernel Bugzilla.
And post an acpidump of the machine there.

Thanks and best regards
-Lv

> From: Mike Marshall [mailto:hubcap@xxxxxxxxxxxx]
> Subject: Re: linux-next boots then hangs...
> 
> Hi Lv...
> 
> I looked at the bugzilla link you sent, I'm glad to help,
> but don't know what I should add there...
> 
> I am "on the road", my co-worker Martin Brandenburg is
> in the office helping with this this week, please keep
> him in the loop too, he knows what is going on and
> has access to the computer where this problem
> shows itself...
> 
> -Mike
> 
> On Sat, Jun 11, 2016 at 9:40 PM, Zheng, Lv <lv.zheng@xxxxxxxxx> wrote:
> > Hi, Mike
> >
> > I just filed a kernel Bugzilla bug tracking this issue:
> > https://bugzilla.kernel.org/show_bug.cgi?id=120041
> > Could you sign into the kernel Bugzilla and help us there?
> >
> > Thanks and best regards
> > -Lv
> >
> >> From: Zheng, Lv
> >> Subject: RE: linux-next boots then hangs...
> >>
> >> Hi,
> >>
> >> If this series matters, probably the only one should get bisected is:
> >> https://patchwork.kernel.org/patch/9087971/
> >> Have you tried:
> >> If this series applied without the above commit, boots hangs can still
> occur?
> >>
> >> Thanks and best regards
> >> -Lv
> >>
> >> > From: Wysocki, Rafael J
> >> > Subject: Re: linux-next boots then hangs...
> >> >
> >> > Let's involve the author of the commits in question (and CC linux-acpi
> >> too).
> >> >
> >> > On 6/8/2016 6:18 PM, Mike Marshall wrote:
> >> > > Hello everyone...
> >> > >
> >> > > The problem is gone today, and it looks like Rafael
> >> > > dropped the ACPICA changes from linux-next.
> >> >
> >> > Indeed, I did that.
> >> >
> >> > Now, it would be good if you could help to identify which of them
> >> > exactly introduced the problem.
> >> >
> >> > Those patches are available in the kernel.org Patchwork as:
> >> >
> >> > https://patchwork.kernel.org/patch/9087951/
> >> > https://patchwork.kernel.org/patch/9088001/
> >> > https://patchwork.kernel.org/patch/9088021/
> >> > https://patchwork.kernel.org/patch/9087971/
> >> >
> >> > plus one fix on top of them:
> >> >
> >> > https://patchwork.kernel.org/patch/9157765/
> >> >
> >> > The ordering of the links above should reflect the correct order of the
> >> > patches (or you can verify that by looking at their subjects).
> >> >
> >> > Can you please try to apply them one by one (they should apply on
> top
> >> of
> >> > the current mainline) and see which one breaks things for you?
> >> >
> >> > Thanks,
> >> > Rafael
> >> >
> >> >
> >> > > Now linux-next has an Oops at leaf_walk_rcu and
> >> > > is not usable <g>... I think I see people on LKML
> >> > > talking about it.
> >> > >
> >> > > Thanks...
> >> > >
> >> > > -Mike
> >> > >
> >> > > On Tue, Jun 7, 2016 at 2:58 PM, Mike Marshall
> >> > <hubcap@xxxxxxxxxxxx> wrote:
> >> > >> Well, I started the bisect again, using Paolo's suggestion.
> >> > >>
> >> > >> It lead me in a circle back to 407aa3f.
> >> > >>
> >> > >> It could be that I'm not competent to perform this bisect, barring
> >> > >> that - it could be that the "bad" code only emerged as the result
> >> > >> of 407aa3f, which, according to the commit message, was a merge
> of
> >> > >> 41 commits...
> >> > >>
> >> > >> As to my bisect competency, sometimes (usually) the next bisect
> >> point
> >> > >> would be a place where 7f9bef9 wouldn't apply. I would only find
> out
> >> > >> that 7f9bef9 wouldn't apply by running the cherry pick, so each
> time
> >> > >> I'd have to clean up the failed cherry pick before I could continue,
> >> > >> which I did like this:
> >> > >>
> >> > >> git cherry-pick -n 7f9bef9                    <-- fail
> >> > >>
> >> > >> git reset HEAD drivers/acpi/acpica/hwregs.c   <-- to unstage
> >> > >>
> >> > >> git checkout -- drivers/acpi/acpica/hwregs.c  <-- discard cherry pick
> >> > wreckage
> >> > >>
> >> > >> Anyhow, I hope I'm being helpful, and not obstructionist, by trying
> >> > >> to follow up on this. Good luck Rafael, I'll definitely try
> >> > >> linux-next tomorrow.
> >> > >>
> >> > >> # git bisect log
> >> > >> git bisect start
> >> > >> # bad: [407aa3ff6f54ea2be7959639d664ae5183e2e9f8] Merge
> >> branch
> >> > 'acpica'
> >> > >> git bisect bad 407aa3ff6f54ea2be7959639d664ae5183e2e9f8
> >> > >> # good: [7f9bef9debafcb767d00efb177d0f2edd4940eab] ACPICA /
> >> > Hardware:
> >> > >> Fix old register check in acpi_hw_get_access_bit_width()
> >> > >> git bisect good 7f9bef9debafcb767d00efb177d0f2edd4940eab
> >> > >> # good: [d1ce3bb95511dacf8b9eea899c421f1b18a3ef6a] Merge
> back
> >> > new
> >> > >> ACPICA material for v4.7.
> >> > >> git bisect good d1ce3bb95511dacf8b9eea899c421f1b18a3ef6a
> >> > >> # good: [d1ce3bb95511dacf8b9eea899c421f1b18a3ef6a] Merge
> back
> >> > new
> >> > >> ACPICA material for v4.7.
> >> > >> git bisect good d1ce3bb95511dacf8b9eea899c421f1b18a3ef6a
> >> > >> # good: [21a9703de3045cda0b3aaa5bc193d2e1062908d2] Merge
> >> > branch
> >> > >> 'for-linus' of
> git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
> >> > >> git bisect good 21a9703de3045cda0b3aaa5bc193d2e1062908d2
> >> > >> # good: [dd287690b0aa4b0d22e8dd7dd2cb3055f5141a27]
> Merge
> >> tag
> >> > >> 'arc-4.6-rc7-fixes' of
> >> > >> git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
> >> > >> git bisect good dd287690b0aa4b0d22e8dd7dd2cb3055f5141a27
> >> > >> # good: [35cd3f4563c4a0fc99be300afc7b82a822e634c7] Merge
> >> > branch
> >> > >> 'for-4.6-fixes' of
> >> > >> git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
> >> > >> git bisect good 35cd3f4563c4a0fc99be300afc7b82a822e634c7
> >> > >> # good: [3f8f0cf2eddb558e5ccf9b155e758f4b950d8697] Merge
> tag
> >> > >> 'usb-4.6-rc7' of
> >> > >> git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
> >> > >> git bisect good 3f8f0cf2eddb558e5ccf9b155e758f4b950d8697
> >> > >> # good: [2b86c4a84377b74a6ec0ec9463feb0803bcb1066] Merge
> tag
> >> > >> 'iio-fixes-for-4.6d' of
> >> > >> git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into
> >> > >> staging-linus
> >> > >> git bisect good 2b86c4a84377b74a6ec0ec9463feb0803bcb1066
> >> > >> # good: [d1306eb675ad7a9a760b6b8e8e189824b8db89e7]
> nvmem:
> >> > mxs-ocotp:
> >> > >> fix buffer overflow in read
> >> > >> git bisect good d1306eb675ad7a9a760b6b8e8e189824b8db89e7
> >> > >> # good: [32cf95db22d49cf4a3b421ba9fd156bb5f920ebb] Merge
> tag
> >> > >> 'char-misc-4.6-rc7' of
> >> > >> git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
> >> > >> git bisect good 32cf95db22d49cf4a3b421ba9fd156bb5f920ebb
> >> > >> # good: [44549e8f5eea4e0a41b487b63e616cb089922b99] Linux
> 4.6-
> >> > rc7
> >> > >> git bisect good 44549e8f5eea4e0a41b487b63e616cb089922b99
> >> > >> # first bad commit:
> [407aa3ff6f54ea2be7959639d664ae5183e2e9f8]
> >> > Merge
> >> > >> branch 'acpica'
> >> > >>
> >> > >> On Tue, Jun 7, 2016 at 11:14 AM, Rafael J. Wysocki
> >> > >> <rafael.j.wysocki@xxxxxxxxx> wrote:
> >> > >>> On 6/7/2016 5:08 PM, Mike Marshall wrote:
> >> > >>>> I'm one of the original reporters and testers of that
> problem/fix...
> >> > >>>> my current problem started after that... I've tested
> >> > >>>> next-20160607 and 4.7.0-rc2-00004-g3613a62 (Linus' tree
> >> > >>>> of the moment) so far today... Linus' tree is still OK (because
> >> > >>>> it has 7f9bef9) and linux-next is still busted (for me).
> >> > >>>>
> >> > >>>> I'll keep on bisecting using the suggestions that Paolo sent...
> >> > >>>
> >> > >>> I see.
> >> > >>>
> >> > >>> I think I'll need to drop the latest ACPICA changes from linux-next
> >> then.
> >> > >>>
> >> > >>> Let me try to do that and please test linux-next again tomorrow.
> >> > >>>
> >> > >>> Thanks,
> >> > >>> Rafael
> >> > >>>
> >> > >>>
> >> > >>>
> >> > >>>> On Tue, Jun 7, 2016 at 10:55 AM, Rafael J. Wysocki
> >> > >>>> <rafael.j.wysocki@xxxxxxxxx> wrote:
> >> > >>>>> On 6/6/2016 10:56 PM, Mike Marshall wrote:
> >> > >>>>>> Greetings...
> >> > >>>>>>
> >> > >>>>>> Please keep my email in the loop on this, I'm only subscribed
> >> > >>>>>> to fs-devel...
> >> > >>>>>>
> >> > >>>>>> Linux-next fails to boot properly for me, but Linux 4.7-rc2
> from
> >> > >>>>>> Linus' tree boots fine.
> >> > >>>>>>
> >> > >>>>>> I got started bisecting next-20160603 last Friday, but didn't
> get
> >> > done.
> >> > >>>>>>
> >> > >>>>>> git bisect start '64289ca' '7f9bef9'
> >> > >>>>>>
> >> > >>>>>> I picked 7f9bef9 as the good commit to start with because I
> >> knew
> >> > >>>>>> I needed 7f9bef9 or else my QEMU-KVM would crash. Before
> I
> >> > started
> >> > >>>>>> the bisection, I verified that 7f9bef9 was indeed good by
> >> checking
> >> > >>>>>> out a branch from next-20160603 with 7f9bef9 as the HEAD
> and
> >> > >>>>>> building it: git checkout -b gas 7f9bef9
> >> > >>>>>>
> >> > >>>>>> Today I got next-20160606 and checked to see if the same
> >> failure
> >> > >>>>>> occurred - it did. So I continued with the bisection of next-
> >> > 20160603.
> >> > >>>>>>
> >> > >>>>>> I arrived at 407aa3ff6f54ea2be7959639d664ae5183e2e9f8
> as
> >> the
> >> > bad commit.
> >> > >>>>>>
> >> > >>>>>>
> >> > >>>>>> 407aa3f is a rather complex commit... there is a problem with
> it,
> >> > >>>>>> but I'm not sure what to do next... both 7f9bef9 and 407aa3f
> are
> >> > >>>>>> related to ACPICA...
> >> > >>>>>
> >> > >>>>> It looks like this commit
> >> > >>>>>
> >> > >>>>>
> >> > >>>>> https://git.kernel.org/cgit/linux/kernel/git/rafael/linux-
> >> > pm.git/commit/?h=acpica-
> >> > fixes&id=7f9bef9debafcb767d00efb177d0f2edd4940eab
> >> > >>>>>
> >> > >>>>> should fix the problem for you.
> >> > >>>>>
> >> > >>>>> Thanks,
> >> > >>>>> Rafael
> >> > >>>>>
> >
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