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Date:      Wed, 29 May 2019 13:56:20 -0600
From:      Scott Long <scottl@samsco.org>
To:        Wallace Barrow <incin@incin.me>
Cc:        freebsd-scsi@freebsd.org
Subject:   Re: SAS3008 On FreeBSD 12 wGeli - OS Wont Boot
Message-ID:  <F19D332A-2E25-4D5F-9C82-220BD4EE6CD0@samsco.org>
In-Reply-To: <41a1b364-4a17-44ff-a3ca-da9b80b16c2e@www.fastmail.com>
References:  <a62c7ed3-f5f1-4a5b-83df-949a32b0d8e8@www.fastmail.com> <120DF864-06FB-4396-887B-78DA3E7DA351@samsco.org> <3A9F7544-40A8-4446-ADC8-18CE57A9F55A@samsco.org> <14e0991e-2e53-4127-baf0-dc674b6d8653@www.fastmail.com> <f1aa37cb-9c0f-4b5e-aa69-05307da3345d@www.fastmail.com> <F80BA500-91BB-46D5-B630-524BA0A53364@samsco.org> <41a1b364-4a17-44ff-a3ca-da9b80b16c2e@www.fastmail.com>

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Thanks!  It looks like there are 2 problems here.  One is that the chain =
frame logic really needs to auto-tune itself and not complain on the =
console (and have larger default scaling).  The second is that under =
extreme resource shortage caused by the lack of chain frames, the driver =
has a bug that corrupts its internal state and bookkeeping.  It=E2=80=99s =
not clear to me why GELI would trigger that, but it=E2=80=99s a good =
clue.  Thanks again for the report, I=E2=80=99ll see if I can find root =
cause.

Scott


> On May 29, 2019, at 1:53 PM, Wallace Barrow <incin@incin.me> wrote:
>=20
> That is correct.=20
>=20
> After the tunable was set the servers were rebooted many times and I =
am unable to reproduce the issue. So it seems that was the fix.
>=20
> --=20
>  Wallace Barrow
>  incin@incin.me
>=20
> On Wed, May 29, 2019, at 2:49 PM, Scott Long wrote:
>> Hi Wallace,
>>=20
>> Sorry for the long delay in getting back to you, thanks for the =
update.=20
>> Is my understanding correct that the problem went away once you=20
>> manually set the chain_frames tunable during install?
>>=20
>> Thanks,
>> Scott
>>=20




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