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Date:      Sun, 18 Feb 2018 13:46:02 -0800
From:      Mark Millard <marklmi26-fbsd@yahoo.com>
To:        Mateusz Guzik <mjguzik@gmail.com>
Cc:        =?utf-8?Q?Trond_Endrest=C3=B8l?= <Trond.Endrestol@fagskolen.gjovik.no>, FreeBSD Hackers <freebsd-hackers@freebsd.org>, FreeBSD Current <freebsd-current@freebsd.org>
Subject:   Re: amd64 head -r329465 (non-debug build, but with symbols): "panic: spin lock held too long" during make check-old, reported during a sys_vfork
Message-ID:  <E9A951DF-914D-4707-8A76-32E627F13EC0@yahoo.com>
In-Reply-To: <CAGudoHHsHGZYo3Ke2MGhk517oti6gEz0Zk0-jSmXVbbk9Vx83g@mail.gmail.com>
References:  <DA76F62D-3373-47CA-AD95-DE9BA580772B@yahoo.com> <6907E068-C80A-44B8-A8AD-3EF27D52D127@yahoo.com> <20832C61-AA5D-41A6-8BF9-90CC87D17219@yahoo.com> <CAGudoHH5Yz6312QSADiOVx9kd17=WcatEB3qyNjTa5qh_hXASg@mail.gmail.com> <alpine.BSF.2.21.1802182023090.24158@mail.fig.ol.no> <6D47FEC0-7991-4F76-AC31-2CC1E8934521@yahoo.com> <alpine.BSF.2.21.1802182134140.24158@mail.fig.ol.no> <CAGudoHHsHGZYo3Ke2MGhk517oti6gEz0Zk0-jSmXVbbk9Vx83g@mail.gmail.com>

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On 2018-Feb-18, at 1:33 PM, Mateusz Guzik <mjguzik@gmail.com> wrote:

> On Sun, Feb 18, 2018 at 9:38 PM, Trond Endrest=C3=B8l <
> Trond.Endrestol@fagskolen.gjovik.no> wrote:
>=20
>> On Sun, 18 Feb 2018 11:51-0800, Mark Millard wrote:
>>=20
>>> Note: -r329448 was reverted in -r329461 : racy.
>>=20
>> True. I got a crash when compiling r329451 while running r329449.
>> I've now booted the r329422 ZFS BE and I'm attempting to build
>> r329529.
>>=20
>=20
> Looking around strongly suggests r329448 is the culprit. If you can =
verify
> 329447 works fine we are mostly done here.
>=20
> Note the revision got reverted and different variant got in in =
r329531.
>=20
> That said, if r329447 works then the issue should be already fixed and =
in
> particular fresh head should work fine.

My initial problem was with -r329465, which is after -r329461 reverted
-r329488 . Trond reported in one note that he had problems with
-r329464 , also after -r329488 was reverted. Trond has also reported
-r329449 failed.

I did manage to revert to -r329447 earlier and so far the results
suggests that it works.

=46rom this I get that -r329449 is the the one that is common to
all the so--far failing combinations. -r329448 is not common to
all of them.


=3D=3D=3D
Mark Millard
marklmi at yahoo.com
( markmi at dsl-only.net is
going away in 2018-Feb, late)




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