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Date:      Fri, 18 Aug 2023 11:05:35 -0700
From:      Mark Millard <marklmi@yahoo.com>
To:        Current FreeBSD <freebsd-current@freebsd.org>
Subject:   Re: ZFS deadlock in 14
Message-ID:  <38A2B0B7-4B9A-4919-A270-75242070B10E@yahoo.com>
In-Reply-To: <5B44567B-BD35-4E37-A016-0EA71D0EB9F1@yahoo.com>
References:  <5B44567B-BD35-4E37-A016-0EA71D0EB9F1@yahoo.com>

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[I had sent to the wrong list. Just fixing that here.]

On Aug 18, 2023, at 09:26, Mark Millard <marklmi@yahoo.com> wrote:

> Dag-Erling_Sm=C3=B8rgrav <des_at_FreeBSD.org> wrote on
> Date: Fri, 18 Aug 2023 14:16:12 UTC :
>=20
>> Dag-Erling Sm=C3=B8rgrav <des@FreeBSD.org> writes:
>>> A kernel built from c47116e909 plus these two patches has so far =
built
>>> 2,285 packages without a hitch, whereas normally it would have
>>> deadlocked after well before reaching 500 packages. I'll do another =
run
>>> without the patches tomorrow just to be sure.
>>=20
>> Plot twist: c47116e909 _without_ the patches also appears to be =
working
>> fine. The last kernel I know for sure deadlocks is b36f469a15, so I'm
>> going to test cd25b0f740 and 28d2e3b5de.
>=20
> I'm confused:
>=20
> Tue, 18 Jul 2023
> . . .
>    =E2=80=A2 git: b36f469a15ec - main - zfs: set autotrim default to =
'off' Yuri Pankov
>=20
> But you had written:
>=20
> Dag-Erling_Sm=C3=B8rgrav <des_at_FreeBSD.org>
> Date: Tue, 15 Aug 2023 17:37:45 UTC=20
> The attached script successfully deadlocks 9228ac3a69c4
>=20
> where:
>=20
> Thu, 10 Aug 2023
> . . .
>    =E2=80=A2 git: 9228ac3a69c4 - main - ixgbe: Add support for 82599 =
LS Kevin Bowling
>=20
> (You had previously reported a poudriere deadlock there as well.)
>=20
> Later on 2023-Aug-10 there is (about 11 or so commits later):
>=20
>    =E2=80=A2 git: cd25b0f740f8 - main - zfs: cherry-pick fix from =
openzfs Martin Matuska=20
>    =E2=80=A2 git: 28d2e3b5dedf - main - zfs: cherry-pick fix from =
openzfs Martin Matuska
>=20
>=20
> I'll note there was also this:
>=20
> Dag-Erling_Sm=C3=B8rgrav <des_at_FreeBSD.org>
> Date: Sat, 12 Aug 2023 14:11:10 UTC=20
> . . .
> Trying to narrow this range down, I did not get a deadlock with
> 4e8d558c9d1c (10 June) but I did with b7198dcfc039 (16 June), albeit
> after building ~1800 packages.
> . . .
>=20
> So the count seems to sometimes go well above 500 or so.



=3D=3D=3D
Mark Millard
marklmi at yahoo.com




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