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10.4-MDEV-29684 Fixes for cluster wide write conflict resolving

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If two high priority threads have lock conflict, we look at the
order of these transactions and honor the earlier transaction.
for_locking parameter in lock_rec_has_to_wait() has become
obsolete and it is now removed from the code .

Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>
This commit is contained in:
sjaakola
2022-10-12 14:13:49 +03:00
committed by Jan Lindström
parent 0ff7f33c7b
commit a44d896f98
3 changed files with 39 additions and 22 deletions
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sql/sql_class.cc
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@ -5230,8 +5230,6 @@ thd_need_ordering_with(const MYSQL_THD thd, const MYSQL_THD other_thd)
(e.g. InnoDB does it by keeping lock_sys.mutex locked)
*/
if (WSREP_ON &&
wsrep_thd_is_BF(thd, false) &&
wsrep_thd_is_BF(other_thd, false) &&
wsrep_thd_order_before(thd, other_thd))
return 0;
#endif /* WITH_WSREP */