Merge pull request ceph#55288 from athanatos/sjust/wip-64140

Revert "crimson/os/alienstore/alien_log: _flush concurrently"

Reviewed-by: Matan Breizman <[email protected]>
Reviewed-by: Yingxin Cheng <[email protected]>

Author: athanatos

src/crimson/os/alienstore/alien_log.cc

@@ -17,15 +17,16 @@ CnLog::~CnLog() {
 }
 
 void CnLog::_flush(EntryVector& q, bool crash) {
-  std::ignore = seastar::alien::submit_to(inst, shard, [&q] {
+  // XXX: the waiting here will block the thread for an indeterministic peroid
+  seastar::alien::submit_to(inst, shard, [&q] {
     for (auto& it : q) {
       crimson::get_logger(it.m_subsys).log(
         crimson::to_log_level(it.m_prio),
         "{}",
         it.strv());
     }
     return seastar::make_ready_future<>();
-  });
+  }).wait();
   q.clear();
   return;
 }