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Date:      Thu, 17 Aug 2023 16:04:27 -0400
From:      Alexander Motin <mav@FreeBSD.org>
To:        =?UTF-8?Q?Dag-Erling_Sm=c3=b8rgrav?= <des@FreeBSD.org>
Cc:        current@freebsd.org, Mateusz Guzik <mjguzik@gmail.com>, Martin Matuska <mm@FreeBSD.org>
Subject:   Re: ZFS deadlock in 14
Message-ID:  <0fd64567-59cd-9276-cc0c-17a09611f11a@FreeBSD.org>
In-Reply-To: <86350hpiby.fsf@ltc.des.no>
References:  <86leeltqcb.fsf@ltc.des.no> <86h6p4s64h.fsf@ltc.des.no> <86a5utrafp.fsf@ltc.des.no> <86350kqokl.fsf@ltc.des.no> <CAGudoHHGeC4qaZpmTc15-Rimo78qVUmg8-oYveMfo0_JO45TSw@mail.gmail.com> <86y1icp95t.fsf@ltc.des.no> <CAGudoHFgyb2%2B3jkfmuzG86FqCQfNfPOuoWpsXFByY=YBYCN%2BFQ@mail.gmail.com> <86ttt0p8wv.fsf@ltc.des.no> <197ead1e-210a-6be6-7e24-5c56b14bb777@FreeBSD.org> <86350hpiby.fsf@ltc.des.no>

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On 17.08.2023 15:41, Dag-Erling Smørgrav wrote:
> Alexander Motin <mav@FreeBSD.org> writes:
>> Trying to run your test (so far without reproduction) I see it
>> producing a substantial amount of ZIL writes.  The range of commits
>> you reduced the scope to so far includes my ZIL locking refactoring,
>> where I know for sure are some deadlocks.  I am already waiting for 3
>> weeks now for reviews and tests for PR that should fix it:
>> https://github.com/openzfs/zfs/pull/15122 .  It would be good if you
>> could test it, though it seems to depend on few more earlier patches
>> not merged to FreeBSD yet.
> 
> Do you have a FreeBSD branch with your patch applied?

I don't have a FreeBSD branch, but these two patches apply clean and 
build on top of today's FreeBSD main branch:

https://github.com/openzfs/zfs/pull/15107
https://github.com/openzfs/zfs/pull/15122

And if you still experience the issue, please show all stacks, or at 
least include ZFS sync threads.

-- 
Alexander Motin



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