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coprocessor: fix data race for tiflash work index in region cache #19198

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lzmhhh123
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@lzmhhh123 lzmhhh123 commented Aug 14, 2020

What problem does this PR solve?

Issue Number: close #19353

Problem Summary: found the data race in https://internal.pingcap.net/idc-jenkins/blue/organizations/jenkins/tidb_ghpr_unit_test/detail/tidb_ghpr_unit_test/46260/pipeline

What is changed and how it works?

What's Changed: operate TiFlashWorkIndex by atomic.

Related changes

  • Need to cherry-pick to the release branch

Check List

Tests

  • Unit test
  • Integration test

Side effects

  • Performance regression
    • Consumes more CPU

Release note

  • fix data race for tiflash work index in region cache

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LGTM

@ti-srebot ti-srebot added the status/LGT1 Indicates that a PR has LGTM 1. label Aug 21, 2020
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LGTM

@ti-srebot ti-srebot removed the status/LGT1 Indicates that a PR has LGTM 1. label Aug 21, 2020
@ti-srebot ti-srebot added the status/LGT2 Indicates that a PR has LGTM 2. label Aug 21, 2020
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/merge

@ti-srebot ti-srebot added the status/can-merge Indicates a PR has been approved by a committer. label Aug 21, 2020
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/run-all-tests

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@lzmhhh123 merge failed.

@lzmhhh123 lzmhhh123 merged commit 69d4517 into pingcap:master Aug 21, 2020
@lzmhhh123 lzmhhh123 deleted the bug-fix/fix_data_race_on_region_cache_tiflash_workindex branch August 21, 2020 08:18
ti-srebot pushed a commit to ti-srebot/tidb that referenced this pull request Aug 21, 2020
Signed-off-by: ti-srebot <ti-srebot@pingcap.com>
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cherry pick to release-3.1 in PR #19361

ti-srebot pushed a commit to ti-srebot/tidb that referenced this pull request Aug 21, 2020
Signed-off-by: ti-srebot <ti-srebot@pingcap.com>
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cherry pick to release-4.0 in PR #19362

ti-srebot added a commit that referenced this pull request Aug 26, 2020
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Get TiFlash region cache data race
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