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Document why thread_yield is used

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Andrea Mazzoleni 2026-07-06 17:31:24 +02:00
parent 056a037761
commit dcb7327f15
1 changed files with 9 additions and 1 deletions
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10
cmdline/io.c
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@ -557,7 +557,15 @@ static void io_flush_thread(struct snapraid_io* io)
if (all_done)
break;
/* wait for something to complete */
/*
* Wait for something to complete.
*
* We cannot use thread_cond_wait(&io->write_done) here because
* write_done is heavily optimized to only be signaled when the oldest
* task in the queue completes (done_index == waiting_index).
* Since io_flush waits for all tasks to complete, it would miss
* wakeups for newer tasks and deadlock.
*/
thread_yield();
}
}