From fb237e67a5688db1ddca2ed7a022572bea5826a7 Mon Sep 17 00:00:00 2001
From: Copilot <copilot@github.com>
Date: Sat, 19 Sep 2026 01:54:21 +0200
Subject: [PATCH 1/2] Split Linux CoreCLR CI into two existing test batches

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 azure-pipelines-PR.yml | 48 ++++++++++++------------------------------
 1 file changed, 14 insertions(+), 34 deletions(-)

diff --git a/azure-pipelines-PR.yml b/azure-pipelines-PR.yml
index 8de979f4031..a3121f096fc 100644
--- a/azure-pipelines-PR.yml
+++ b/azure-pipelines-PR.yml
@@ -465,8 +465,14 @@ stages:
           - pwsh: .\eng\MockBuild.ps1
             displayName: Build with OfficialBuildId
 
-        # Linux
+        # Linux (split into 2 batches; batch 3 is desktop-only FSharpSuite)
         - job: Linux
+          strategy:
+            matrix:
+              Batch1:
+                batchNumber: 1
+              Batch2:
+                batchNumber: 2
           pool:
             name: $(DncEngPublicBuildPool)
             demands: ImageOverride -equals $(LinuxMachineQueueName)
@@ -475,39 +481,13 @@ stages:
           - name: _SignType
             value: Test
           steps:
-          - checkout: self
-            clean: true
-          - script: ./eng/cibuild.sh --configuration $(_BuildConfig) --testcoreclr
-            displayName: Build / Test
-          - task: PublishTestResults@2
-            displayName: Publish Test Results
-            inputs:
-              testResultsFormat: 'XUnit'
-              testRunTitle: Linux
-              testResultsFiles: '*.xml'
-              mergeTestResults: true
-              searchFolder: '$(Build.SourcesDirectory)/artifacts/TestResults/$(_BuildConfig)'
-            continueOnError: true
-            condition: succeededOrFailed()
-          - task: PublishBuildArtifacts@1
-            displayName: Publish Test Logs
-            inputs:
-              PathtoPublish: '$(Build.SourcesDirectory)/artifacts/TestResults/$(_BuildConfig)'
-              ArtifactName: 'Linux $(_BuildConfig) test logs'
-              publishLocation: Container
-            continueOnError: true
-            condition: failed()
-          - script: dotnet build $(Build.SourcesDirectory)/eng/DumpPackageRoot/DumpPackageRoot.csproj
-            displayName: Dump NuGet cache contents
-            condition: failed()
-          - task: PublishBuildArtifacts@1
-            displayName: Publish NuGet cache contents
-            inputs:
-              PathtoPublish: '$(Build.SourcesDirectory)/artifacts/NugetPackageRootContents'
-              ArtifactName: 'NuGetPackageContents Linux'
-              publishLocation: Container
-            continueOnError: true
-            condition: failed()
+          - template: /eng/templates/batched-test-steps.yml
+            parameters:
+              buildCommand: ./eng/cibuild.sh --configuration $(_BuildConfig) --testcoreclrbatch $(batchNumber)
+              testRunTitlePrefix: 'Linux'
+              artifactNamePrefix: 'Linux'
+              publishBinLog: true
+              binLogPath: '$(Build.SourcesDirectory)/artifacts/log/Release/Build.binlog'
 
         # MacOS (split into 2 batches; batch 3 is desktop-only FSharpSuite)
         - job: MacOS

From 2a8cc293a4b785a7c9a3649749b5c2d861144d6a Mon Sep 17 00:00:00 2001
From: Copilot <copilot@github.com>
Date: Sat, 19 Sep 2026 02:19:05 +0200
Subject: [PATCH 2/2] Add release notes

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 docs/release-notes/.FSharp.Compiler.Service/11.0.100.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docs/release-notes/.FSharp.Compiler.Service/11.0.100.md b/docs/release-notes/.FSharp.Compiler.Service/11.0.100.md
index f02f04c8dcf..f7a4404b100 100644
--- a/docs/release-notes/.FSharp.Compiler.Service/11.0.100.md
+++ b/docs/release-notes/.FSharp.Compiler.Service/11.0.100.md
@@ -143,6 +143,7 @@
 * Emit debug points at a stack-empty position ([PR #19877](https://github.com/dotnet/fsharp/pull/19877))
 * Fix spurious XmlDoc warnings (unknown parameter / no documentation for parameter) under `--warnon:3390` when a get/set property documents the full parameter set across both accessors. ([Issue #13684](https://github.com/dotnet/fsharp/issues/13684), [PR #19884](https://github.com/dotnet/fsharp/pull/19884))
 * Replace internal compiler error FS0193 with a clear FS3891 diagnostic when a type abbreviation aliases a generic attribute type (e.g. `type B = A<int>` then `[<B>] ...`). Generic attributes remain unsupported in F#. ([Issue #7877](https://github.com/dotnet/fsharp/issues/7877), [PR #19915](https://github.com/dotnet/fsharp/pull/19915))
+* Split Linux CoreCLR CI into two parallel test batches to reduce test turnaround time. ([PR #20587](https://github.com/dotnet/fsharp/pull/20587))
 * Fix Go to Metadata rendering of IL literal (`const`) fields - they now appear with `[<Literal>]` and their constant value, e.g. `System.Char.MaxValue` no longer shows as a plain `static val`. ([Issue #11526](https://github.com/dotnet/fsharp/issues/11526), [PR #19922](https://github.com/dotnet/fsharp/pull/19922))
 * FSI multi-assembly emit (`--multiemit+`) now attaches `System.Diagnostics.DebuggableAttribute(DisableOptimizations|Default)` to each submission's manifest when local optimizations are disabled (`--optimize-`), matching the single-emit and regular-compiler behavior so debuggers see submissions as unoptimized. ([Issue #14572](https://github.com/dotnet/fsharp/issues/14572), [PR #19921](https://github.com/dotnet/fsharp/pull/19921))
 * Stop F# Interactive from mutating script arguments that follow `--`. Abbreviated flags like `-d`, `-r`, `-I` after the `--` separator are no longer colon-joined with their next token in `fsi.CommandLineArgs`. ([Issue #10819](https://github.com/dotnet/fsharp/issues/10819), [PR #19926](https://github.com/dotnet/fsharp/pull/19926))