Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

Perform two flush over the same segment concurrently. One could be triggered in background and another could be triggered via write.

2. What did you expect to see? (Required)

One flush wait for another.

3. What did you see instead (Required)

CPU is 100% during one flush waiting for another.

4. What is your TiFlash version? (Required)

master