Fix can't found PageFile after hardlink.

[jiaqizho]

What problem does this PR solve?

Issue Number: close #3438

Problem Summary:

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• JaySon-Huang

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[jiaqizho]

/rebuild

[jiaqizho]

@JaySon-Huang PTAL

[jiaqizho]

/merge

[ti-chi-bot]

@jiaqizho: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

You only need to trigger /merge once, and if the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 7f1f954

[sre-bot]

Coverage detail: https://ci-internal.pingcap.net/job/tics_ghpr_unit_test/540/cobertura/
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[jiaqizho]

/run-all-tests

[sre-bot]

Coverage detail: https://ci-internal.pingcap.net/job/tics_ghpr_unit_test/545/cobertura/
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lines: 42.5% (47587 out of 111889)
branches: 6.0% (73139 out of 1209047)

[ti-chi-bot]

@jiaqizho: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

[sre-bot]

Coverage detail: https://ci-internal.pingcap.net/job/tics_ghpr_unit_test/553/cobertura/
(Coverage detail url is limited office network access)

lines: 42.6% (47677 out of 111890)
branches: 6.1% (73249 out of 1209051)

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #3722.