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From: Cyrill Gorcunov via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: Serge Petrenko <sergepetrenko@tarantool.org>
Cc: tml <tarantool-patches@dev.tarantool.org>,
	Vladislav Shpilevoy <v.shpilevoy@tarantool.org>
Subject: Re: [Tarantool-patches] [PATCH v19 2/3] qsync: order access to the limbo terms
Date: Fri, 1 Oct 2021 15:31:46 +0300
Message-ID: <YVb/shiDzv48qAqr@grain> (raw)
In-Reply-To: <0c64d172-4fa8-29ec-7845-ff772738c09a@tarantool.org>

On Fri, Oct 01, 2021 at 03:14:52PM +0300, Serge Petrenko wrote:
...
> > +/** Process a synchronous replication request. */
> >   void
> >   txn_limbo_process(struct txn_limbo *limbo, const struct synchro_request *req);
> 
> Thanks for the patch!
> 
> Mostly ok with one question:
> 
> What about txn_limbo_write_confirm/txn_limbo_read_confirm pairs issued
> inside txn_limbo_ack() and txn_limbo_on_parameters_change() ?
> 
> Shouldn't they take the latch as well? I mean, txn_limbo_ack() and
> txn_limbo_on_parameters_change() as a whole.

Wait, Serge, currently we guard promote_map/max_term, so it won't be
read while there is its update on the fly. Thus If only I'm not missing
something obvious txn_limbo_on_parameters_change() can't interfere with
promote data or race with it anyhow. If you mean some other race then
it seems I don't see it yet, but I suspect I might be simply wrong :)

  reply	other threads:[~2021-10-01 12:31 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-30  9:44 [Tarantool-patches] [PATCH v19 0/3] qsync: implement packet filtering (part 1) Cyrill Gorcunov via Tarantool-patches
2021-09-30  9:44 ` [Tarantool-patches] [PATCH v19 1/3] latch: add latch_is_locked helper Cyrill Gorcunov via Tarantool-patches
2021-09-30  9:44 ` [Tarantool-patches] [PATCH v19 2/3] qsync: order access to the limbo terms Cyrill Gorcunov via Tarantool-patches
2021-10-01 12:14   ` Serge Petrenko via Tarantool-patches
2021-10-01 12:31     ` Cyrill Gorcunov via Tarantool-patches [this message]
2021-10-01 12:37       ` Serge Petrenko via Tarantool-patches
2021-10-04 21:53         ` Cyrill Gorcunov via Tarantool-patches
2021-10-05 13:25           ` Serge Petrenko via Tarantool-patches
2021-10-05 21:52             ` Cyrill Gorcunov via Tarantool-patches
2021-09-30  9:44 ` [Tarantool-patches] [PATCH v19 3/3] test: add gh-6036-qsync-order test Cyrill Gorcunov via Tarantool-patches
2021-10-01 12:30   ` Serge Petrenko via Tarantool-patches
2021-10-04 21:16     ` Cyrill Gorcunov via Tarantool-patches
2021-10-05 13:55       ` Serge Petrenko via Tarantool-patches
2021-10-05 22:26         ` Cyrill Gorcunov via Tarantool-patches
2021-10-05 22:32           ` Cyrill Gorcunov via Tarantool-patches
2021-10-06  7:06             ` Cyrill Gorcunov via Tarantool-patches

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