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logger: avoid potential races between IO and symlink updates

This commit is contained in:
Thomas Schoebel-Theuer 2013-06-18 11:17:34 +02:00
parent 39ed143e27
commit 5b523f16f7
1 changed files with 3 additions and 0 deletions
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3
kernel/mars_trans_logger.c
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@ -2908,6 +2908,9 @@ void trans_logger_replay(struct trans_logger_brick *brick)
if ((atomic_read(&brick->replay_count) <= 0 ||
((long long)jiffies) - old_jiffies >= HZ * 3) &&
finished_pos >= 0) {
// for safety, wait until the IO queue has drained.
wait_event_interruptible_timeout(brick->worker_event, atomic_read(&brick->replay_count) <= 0, 1 * HZ);
down(&input->inf_mutex);
input->inf.inf_min_pos = finished_pos;
get_lamport(&input->inf.inf_min_pos_stamp);