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From: Serge Petrenko via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: v.shpilevoy@tarantool.org, tarantool-patches@dev.tarantool.org
Subject: Re: [Tarantool-patches] [PATCH v2 4/9] box: make clear_synchro_queue() write a PROMOTE entry instead of CONFIRM + ROLLBACK
Date: Wed, 14 Apr 2021 11:23:23 +0300	[thread overview]
Message-ID: <86a5cfc2-ee8b-c781-472e-8a91bdf00246@tarantool.org> (raw)
In-Reply-To: <YHWrqtwExW4ToM5A@grain>



13.04.2021 17:33, Cyrill Gorcunov пишет:
> On Mon, Apr 12, 2021 at 10:40:17PM +0300, Serge Petrenko wrote:
>>   		} else {
>> -			txn_limbo_force_empty(&txn_limbo, wait_lsn);
>> +			/*
>> +			 * Term parameter is unused now, We'll pass
>> +			 * box_raft()->term there later.
>> +			 */
>> +			txn_limbo_write_promote(&txn_limbo, wait_lsn, 0);
>> +			struct synchro_request req = {
>> +				.type = 0, /* unused */
>> +				.replica_id = 0, /* unused */
>> +				.origin_id = instance_id,
>> +				.lsn = wait_lsn,
>> +				.term = 0, /* unused */
>> +			};
> Is there some particular meaning of zeroifying designated assignments?
> I mean why not simply
>
> 			struct synchro_request req = {
> 				.origin_id	= instance_id,
> 				.lsn		= wait_lsn,
> 			};
>
> or you wanted to pay attention that the left of the fields are
> unused? Just curious, I'm fine with current code.

I went for your option at first, and it's the one I'd prefer.
But with it I got failed builds in some CI jobs.

It said something like "sorry, not yet implemented: struct partial
initialization"

Maybe the error was there because I initialize not the first
struct members. It's strange, because we use such "partial initializations"
in some other places IIRC.

Anyway, zeroifying unused fields explicitly helped.

-- 
Serge Petrenko


  reply	other threads:[~2021-04-14  8:23 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-12 19:40 [Tarantool-patches] [PATCH v2 0/9] raft: introduce manual elections and fix a bug with re-applying rolled back transactions Serge Petrenko via Tarantool-patches
2021-04-12 19:40 ` [Tarantool-patches] [PATCH v2 1/9] wal: enrich row's meta information with sync replication flags Serge Petrenko via Tarantool-patches
2021-04-13 11:50   ` Cyrill Gorcunov via Tarantool-patches
2021-04-13 13:51     ` Serge Petrenko via Tarantool-patches
2021-04-13 14:16       ` Cyrill Gorcunov via Tarantool-patches
2021-04-13 13:09   ` Cyrill Gorcunov via Tarantool-patches
2021-04-13 13:29     ` Serge Petrenko via Tarantool-patches
2021-04-12 19:40 ` [Tarantool-patches] [PATCH v2 2/9] xrow: introduce a PROMOTE entry Serge Petrenko via Tarantool-patches
2021-04-13 14:15   ` Cyrill Gorcunov via Tarantool-patches
2021-04-14  9:12     ` Serge Petrenko via Tarantool-patches
2021-04-14 10:00       ` Cyrill Gorcunov via Tarantool-patches
2021-04-12 19:40 ` [Tarantool-patches] [PATCH v2 3/9] box: actualise iproto_key_type array Serge Petrenko via Tarantool-patches
2021-04-12 19:40 ` [Tarantool-patches] [PATCH v2 4/9] box: make clear_synchro_queue() write a PROMOTE entry instead of CONFIRM + ROLLBACK Serge Petrenko via Tarantool-patches
2021-04-13 14:33   ` Cyrill Gorcunov via Tarantool-patches
2021-04-14  8:23     ` Serge Petrenko via Tarantool-patches [this message]
2021-04-14  8:34       ` Cyrill Gorcunov via Tarantool-patches
2021-04-14  9:12     ` Serge Petrenko via Tarantool-patches
2021-04-12 19:40 ` [Tarantool-patches] [PATCH v2 5/9] box: write PROMOTE even for empty limbo Serge Petrenko via Tarantool-patches
2021-04-12 19:40 ` [Tarantool-patches] [PATCH v2 6/9] raft: keep track of greatest known term and filter replication sources based on that Serge Petrenko via Tarantool-patches
2021-04-12 19:40 ` [Tarantool-patches] [PATCH v2 7/9] replication: introduce a new election mode: "manual" Serge Petrenko via Tarantool-patches
2021-04-12 19:40 ` [Tarantool-patches] [PATCH v2 8/9] Support manual elections in `box.ctl.clear_synchro_queue()` Serge Petrenko via Tarantool-patches
2021-04-12 19:40 ` [Tarantool-patches] [PATCH v2 9/9] box.ctl: rename clear_synchro_queue to promote Serge Petrenko via Tarantool-patches
2021-04-13 14:42 ` [Tarantool-patches] [PATCH v2 0/9] raft: introduce manual elections and fix a bug with re-applying rolled back transactions Cyrill Gorcunov via Tarantool-patches

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