Change default Linux thread policy to merge platform and UI threads. #176759
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This matches the other platforms who have already done this migration (Android and iOS in 3.32, Windows and MacOS in 3.33). Applications may opt-out of this change by setting the thread policy to unmerged with: ```c fl_dart_project_set_ui_thread_policy(project, FL_UI_THREAD_POLICY_RUN_ON_SEPARATE_THREAD); ``` in `linux/runner/my_application.cc`
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It looks like this pull request may not have tests. Please make sure to add tests or get an explicit test exemption before merging. If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix? Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing. If you believe this PR qualifies for a test exemption, contact "@test-exemption-reviewer" in the #hackers channel in Discord (don't just cc them here, they won't see it!). The test exemption team is a small volunteer group, so all reviewers should feel empowered to ask for tests, without delegating that responsibility entirely to the test exemption group. |
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This pull request changes the default thread policy on Linux to merge the platform and UI threads, aligning it with other platforms. The implementation in fl_engine.cc correctly uses a switch statement to handle the different thread policies. My review focuses on ensuring the change is robust and well-tested.
loic-sharma
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Oct 9, 2025
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Thanks! We probably need an entry on https://docs.flutter.dev/release/breaking-changes similar to the 3.35 one for macOS and Windows? |
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Made a draft PR for the documentation change in flutter/website#12534 |
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Manual roll Flutter from e11e2c1 to 7cd821c (73 revisions) Manual roll requested by tarrinneal@google.com flutter/flutter@e11e2c1...7cd821c 2025-10-14 bruno.leroux@gmail.com Fix computeDistanceToActualBaseline throws when accessing child size (flutter/flutter#176906) 2025-10-14 47866232+chunhtai@users.noreply.github.com iOS can set application locale before view controller is set (flutter/flutter#176592) 2025-10-14 jason-simmons@users.noreply.github.com Roll ANGLE to a branch based on d9fa255a5c22 (flutter/flutter#176747) 2025-10-14 47866232+chunhtai@users.noreply.github.com Relands "Fixes keyboard selects disabled radio" (flutter/flutter#176977) 2025-10-14 huy@nevercode.io Fix expansion tile is missing state announcement on non-Apple platforms (flutter/flutter#175480) 2025-10-14 30870216+gaaclarke@users.noreply.github.com impeller: allows access of float uniforms by name (flutter/flutter#176728) 2025-10-14 aam@google.com Roll dart sdk to 3.11.0-17.0.dev (flutter/flutter#176947) 2025-10-13 okorohelijah@google.com Move iOS integration tests (flutter/flutter#176940) 2025-10-13 ahmedsameha1@gmail.com Make sure that an InputDatePickerFormField doesn't crash in 0x0 envir… (flutter/flutter#176047) 2025-10-13 jason-simmons@users.noreply.github.com [web] Match the behavior of other platforms in Web Locale.toString if the country code is an empty string (flutter/flutter#176862) 2025-10-13 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Fixes keyboard selects disabled radio (#176727)" (flutter/flutter#176958) 2025-10-13 47866232+chunhtai@users.noreply.github.com Fixes keyboard selects disabled radio (flutter/flutter#176727) 2025-10-13 engine-flutter-autoroll@skia.org Roll Packages from e319c40 to d062181 (2 revisions) (flutter/flutter#176916) 2025-10-13 jason-simmons@users.noreply.github.com Roll SwiftShader to 794b0cfce1d8 (flutter/flutter#176806) 2025-10-13 32538273+ValentinVignal@users.noreply.github.com Make DropdownMenu generic type non nullable (flutter/flutter#176711) 2025-10-12 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from BWGpRvpdQh-HJpq1c... to _dd0Jv50H0oUI2Ad8... (flutter/flutter#176895) 2025-10-11 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from JpiUsek1hU5r9QVKP... to BWGpRvpdQh-HJpq1c... (flutter/flutter#176880) 2025-10-11 codefu@google.com fix: content hash check for LUCI_CONTEXT (flutter/flutter#176867) 2025-10-11 34465683+rkishan516@users.noreply.github.com Feat: make tooltip position customizeable (flutter/flutter#175047) 2025-10-11 engine-flutter-autoroll@skia.org Roll Dart SDK from d88d8bf2b53c to 65b171958c93 (3 revisions) (flutter/flutter#176871) 2025-10-11 34465683+rkishan516@users.noreply.github.com feat: apply radioGroup role to segmented control widgets (flutter/flutter#176157) 2025-10-10 ahmedsameha1@gmail.com Make sure that a CheckboxMenuButton doesn't crash in 0x0 environment (flutter/flutter#176450) 2025-10-10 Rusino@users.noreply.github.com [WebParagraph] Support for more styles, placeholders, decorations, etc (flutter/flutter#172853) 2025-10-10 jason-simmons@users.noreply.github.com Set up a version of build_ios_framework_module_test that only runs on x64 machines and extend its timeout (flutter/flutter#176811) 2025-10-10 engine-flutter-autoroll@skia.org Roll Packages from 0b41de3 to e319c40 (1 revision) (flutter/flutter#176833) 2025-10-10 danny@tuppeny.com [tool/dap] Forward app.warning events from Flutter to DAP client (flutter/flutter#176827) 2025-10-10 engine-flutter-autoroll@skia.org Roll Dart SDK from 70c00d3ceb3a to d88d8bf2b53c (1 revision) (flutter/flutter#176830) 2025-10-10 sokolovskyi.konstantin@gmail.com Remove unnecessary nullable types in examples. (flutter/flutter#176713) 2025-10-10 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from xArtL4DH0FsdwSqG_... to JpiUsek1hU5r9QVKP... (flutter/flutter#176822) 2025-10-10 bruno.leroux@gmail.com Cleanup OutlinedButton.icon documentation and implementation (flutter/flutter#176630) 2025-10-10 34871572+gmackall@users.noreply.github.com [HCPP] Properly remove hcpp views that are no longer visible (flutter/flutter#176742) 2025-10-10 ahmedsameha1@gmail.com Make sure that an InputChip doesn't crash in 0x0 environment (flutter/flutter#175930) 2025-10-10 737941+loic-sharma@users.noreply.github.com Update Flutter templates' Dart style (flutter/flutter#175963) 2025-10-10 ahmedsameha1@gmail.com Make sure that a DropdownButtonFormField doesn't crash in 0x0 environ… (flutter/flutter#174958) 2025-10-10 ahmedsameha1@gmail.com Make sure that an InkWell doesn't crash in 0x0 environment (flutter/flutter#175871) 2025-10-10 ahmedsameha1@gmail.com Handle#6537 end drawer button (flutter/flutter#173026) 2025-10-10 engine-flutter-autoroll@skia.org Roll Dart SDK from a9b7bd4b0b32 to 70c00d3ceb3a (4 revisions) (flutter/flutter#176815) 2025-10-10 robert.ancell@canonical.com Change default Linux thread policy to merge platform and UI threads. (flutter/flutter#176759) 2025-10-09 bkonyi@google.com [ Tool ] Roll package:dwds to 26.0.0 (flutter/flutter#176808) 2025-10-09 43054281+camsim99@users.noreply.github.com Update `CHANGELOG` to include 3.35.6 notes (flutter/flutter#176803) 2025-10-09 36861262+QuncCccccc@users.noreply.github.com Announce text and button together when DropdownMenu is treated as a button (flutter/flutter#176428) 2025-10-09 gregorysconrad@gmail.com [native_assets] create macOS CCompilerConfig via xcrun --find (flutter/flutter#175717) 2025-10-09 chinmaygarde@google.com [Impeller] Fix broken links in README. (flutter/flutter#176770) 2025-10-09 chinmaygarde@google.com Fix links to Custom Flutter Engine Embedders in README. (flutter/flutter#175807) ...
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…lutter#176759) This matches the other platforms who have already done this migration (Android and iOS in 3.32, Windows and MacOS in 3.33). Applications may opt-out of this change by setting the thread policy to unmerged with: ```c fl_dart_project_set_ui_thread_policy(project, FL_UI_THREAD_POLICY_RUN_ON_SEPARATE_THREAD); ``` in `linux/runner/my_application.cc`
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This matches the other platforms who have already done this migration (Android and iOS in 3.32, Windows and MacOS in 3.33).
Applications may opt-out of this change by setting the thread policy to unmerged with:
in
linux/runner/my_application.cc