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os/filestore: move ondisk in front, so that return oncommit earlier, and improve write op performance.

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Signed-off-by: Pan Liu <liupan1111@gmail.com>
This commit is contained in:
Pan Liu 2017-03-10 23:05:33 +08:00
parent 25c2482735
commit 21f167cf39
1 changed files with 7 additions and 6 deletions
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13
src/os/filestore/FileStore.cc
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@ -2215,18 +2215,19 @@ void FileStore::_journaled_ahead(OpSequencer *osr, Op *o, Context *ondisk)
{
dout(5) << "_journaled_ahead " << o << " seq " << o->op << " " << *osr << " " << o->tls << dendl;
// this should queue in order because the journal does it's completions in order.
queue_op(osr, o);
list<Context*> to_queue;
osr->dequeue_journal(&to_queue);
// do ondisk completions async, to prevent any onreadable_sync completions
// getting blocked behind an ondisk completion.
if (ondisk) {
dout(10) << " queueing ondisk " << ondisk << dendl;
ondisk_finishers[osr->id % m_ondisk_finisher_num]->queue(ondisk);
}
// this should queue in order because the journal does it's completions in order.
queue_op(osr, o);
list<Context*> to_queue;
osr->dequeue_journal(&to_queue);
if (!to_queue.empty()) {
ondisk_finishers[osr->id % m_ondisk_finisher_num]->queue(to_queue);
}