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MDEV-4506, parallel replication.

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Some after-review fixes.
This commit is contained in:
unknown
2013-09-13 15:09:57 +02:00
parent 13fddb32de
commit d107bdaa01
16 changed files with 311 additions and 191 deletions
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7
sql/sql_class.cc
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@@ -5666,6 +5666,10 @@ wait_for_commit::register_wait_for_prior_commit(wait_for_commit *waitee)
waiting_for_commit= false;
else
{
/*
Put ourself at the head of the waitee's list of transactions that must
wait for it to commit first.
*/
this->next_subsequent_commit= waitee->subsequent_commits_list;
waitee->subsequent_commits_list= this;
}
@@ -5704,7 +5708,7 @@ wait_for_commit::wait_for_prior_commit2()
The waiter needs to lock the waitee to delete itself from the list in
unregister_wait_for_prior_commit(). Thus wakeup_subsequent_commits() can not
hold its own lock while locking waiters, lest we deadlock.
hold its own lock while locking waiters, as this could lead to deadlock.
So we need to prevent unregister_wait_for_prior_commit() running while wakeup
is in progress - otherwise the unregister could complete before the wakeup,
@@ -5727,6 +5731,7 @@ wait_for_commit::wait_for_prior_commit2()
would not be woken up until next wakeup, which could be potentially much
later than necessary.
*/
void
wait_for_commit::wakeup_subsequent_commits2()
{