26 files changed, 225 insertions, 803 deletions
diff --git a/.cirrus.yml b/.cirrus.yml
index 7a5f9a6d..fa035e81 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -19,18 +19,6 @@ task:
     - |
       echo "~~~~ rustc --version ~~~~"
       rustc --version
-
-      # Remove any existing patch statements
-      mv Cargo.toml Cargo.toml.bck
-      sed -n '/\[patch.crates-io\]/q;p' Cargo.toml.bck > Cargo.toml
-
-      # Patch all crates
-      cat ci/patch.toml >> Cargo.toml
-
-      # Print `Cargo.toml` for debugging
-      echo "~~~~ Cargo.toml ~~~~"
-      cat Cargo.toml
-      echo "~~~~~~~~~~~~~~~~~~~~"
   test_script:
     - . $HOME/.cargo/env
     - cargo test --all
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..33ac957c
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,222 @@
+on:
+  push:
+    branches: ["master"]
+  pull_request:
+    branches: ["master"]
+
+name: CI
+
+env:
+  RUSTFLAGS: -Dwarnings
+  RUST_BACKTRACE: 1
+  nightly: nightly-2020-07-12
+  minrust: 1.39.0
+
+jobs:
+  test:
+    name: test tokio full
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - windows-latest
+          - ubuntu-latest
+          - macos-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install Rust
+        run: rustup update stable
+      - name: Install cargo-hack
+        run: cargo install cargo-hack
+
+      # Run `tokio` with `full` features. This excludes testing utilities which
+      # can alter the runtime behavior of Tokio.
+      - name: test tokio full
+        run: cargo test --features full
+        working-directory: tokio
+
+      # Check `tokio` with `full + parking_lot` to make sure it compiles.
+      - name: check tokio full,parking_lot
+        run: cargo check --features full,parking_lot
+        working-directory: tokio
+
+      # Test **all** crates in the workspace with all features.
+      - name: test all --all-features
+        run: cargo test --workspace --all-features
+
+      # Run integration tests for each feature
+      - name: test tests-integration --each-feature
+        run: cargo hack test --each-feature
+        working-directory: tests-integration
+
+      # Run macro build tests
+      - name: test tests-build --each-feature
+        run: cargo hack test --each-feature
+        working-directory: tests-build
+
+  test-unstable:
+    name: test tokio full --unstable
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - windows-latest
+          - ubuntu-latest
+          - macos-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install Rust
+        run: rustup update stable
+
+      # Run `tokio` with "unstable" cfg flag.
+      - name: test tokio full --cfg unstable
+        run: cargo test --features full
+        working-directory: tokio
+        env:
+          RUSTFLAGS: '--cfg tokio_unstable'
+
+  miri:
+    name: miri
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ env.nightly }}
+          override: true
+      - name: Install Miri
+        run: |
+          set -e
+          rustup component add miri
+          cargo miri setup
+          rm -rf tokio/tests
+
+      - name: miri
+        run: cargo miri test --features rt-core,rt-threaded,rt-util,sync -- -- task
+        working-directory: tokio
+
+  cross:
+    name: cross
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        target:
+          - i686-unknown-linux-gnu
+          - powerpc-unknown-linux-gnu
+          - powerpc64-unknown-linux-gnu
+          - mips-unknown-linux-gnu
+          - arm-linux-androideabi
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          target: ${{ matrix.target }}
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          use-cross: true
+          command: check
+          args: --workspace --target ${{ matrix.target }}
+
+  features:
+    name: features
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ env.nightly }}
+          override: true
+      - name: Install cargo-hack
+        run: cargo install cargo-hack
+
+      - name: check --each-feature
+        run: cargo hack check --all --each-feature -Z avoid-dev-deps
+
+      # Try with unstable feature flags
+      - name: check --each-feature --unstable
+        run: cargo hack check --all --each-feature -Z avoid-dev-deps
+        env:
+          RUSTFLAGS: --cfg tokio_unstable
+
+  minrust:
+    name: minrust
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ env.minrust }}
+          override: true
+
+      - name: "test --workspace --all-features"
+        run: cargo check --workspace --all-features
+
+  fmt:
+    name: fmt
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install Rust
+        run: rustup update stable
+      - name: Install rustfmt
+        run: rustup component add rustfmt
+
+      # Check fmt
+      - name: "rustfmt --check"
+        # Workaround for rust-lang/cargo#7732
+        run: rustfmt --check --edition 2018 $(find . -name '*.rs' -print)
+
+  clippy:
+    name: clippy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install Rust
+        run: rustup update stable
+      - name: Install clippy
+        run: rustup component add clippy
+
+      # Run clippy
+      - name: "clippy --all"
+        run: cargo clippy --all --tests
+
+  docs:
+    name: docs
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ env.nightly }}
+          override: true
+
+      - name: "doc --lib --all-features"
+        run: cargo doc --lib --no-deps --all-features
+        env:
+          RUSTDOCFLAGS: --cfg docsrs
+
+  loom:
+    name: loom
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        scope:
+          - --skip loom_pool
+          - loom_pool::group_a
+          - loom_pool::group_b
+          - loom_pool::group_c
+          - loom_pool::group_d
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install Rust
+        run: rustup update stable
+
+      - name: loom ${{ matrix.scope }}
+        run: cargo test --lib --release --features full -- --nocapture $SCOPE
+        working-directory: tokio
+        env:
+          RUSTFLAGS: --cfg loom --cfg tokio_unstable
+          LOOM_MAX_PREEMPTIONS: 2
+          SCOPE: ${{ matrix.scope }}
diff --git a/.github/workflows/test_tokio.yml b/.github/workflows/test_tokio.yml
deleted file mode 100644
index d6d32b8f..00000000
--- a/.github/workflows/test_tokio.yml
+++ /dev/null
@@ -1,129 +0,0 @@
-on:
-  push:
-    branches: ["master"]
-  pull_request:
-    branches: ["master"]
-
-name: Test tokio
-
-env:
-  RUSTFLAGS: -Dwarnings
-  RUST_BACKTRACE: 1
-  nightly: nightly-2020-01-25
-
-jobs:
-  test_tokio:
-    name: Test tokio full
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os:
-          - windows-latest
-          - ubuntu-latest
-          - macos-latest
-    steps:
-      - uses: actions/checkout@master
-      - name: Install Rust
-        run: rustup update stable
-
-      # Run `tokio` with only `full`
-      - uses: actions-rs/cargo@v1
-        with:
-          command: test
-          args: --manifest-path ${{ github.workspace }}/tokio/Cargo.toml --features full
-        name: tokio - cargo test --features full
-
-      # Run `tokio` with "unstable" cfg flag
-      - uses: actions-rs/cargo@v1
-        with:
-          command: test
-          args: --manifest-path ${{ github.workspace }}/tokio/Cargo.toml --features full
-        env:
-          RUSTFLAGS: '--cfg tokio_unstable'
-        name: tokio - cargo test --features full --cfg tokio_unstable
-
-  test_cross_subcrates:
-    name: Test ${{ matrix.crate }} (${{ matrix.os }}) all-features
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        crate:
-          - tokio
-          - tests-integration
-        os:
-          - windows-latest
-          - ubuntu-latest
-          - macos-latest
-        include:
-          - crate: tokio-macros
-            os: ubuntu-latest
-          - crate: tokio-test
-            os: ubuntu-latest
-          - crate: tokio-util
-            os: ubuntu-latest
-          - crate: examples
-            os: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@master
-      - name: Install Rust
-        run: rustup update stable
-
-      # Run with all crate features
-      - name: ${{ matrix.crate }} - cargo test --all-features
-        uses: actions-rs/cargo@v1
-        with:
-          command: test
-          args: --manifest-path ${{ github.workspace }}/${{ matrix.crate }}/Cargo.toml --all-features
-
-        # Check benches
-      - name: ${{ matrix.crate }} - cargo check --benches
-        uses: actions-rs/cargo@v1
-        with:
-          command: check
-          args: --manifest-path ${{ github.workspace }}/${{ matrix.crate }}/Cargo.toml --all-features --benches
-
-      - name: Patch Cargo.toml
-        shell: bash
-        run: |
-          set -e
-
-          # Remove any existing patch statements
-          mv Cargo.toml Cargo.toml.bck
-          sed -n '/\[patch.crates-io\]/q;p' Cargo.toml.bck > Cargo.toml
-
-          # Patch all crates
-          cat ci/patch.toml >> Cargo.toml
-
-          # Print `Cargo.toml` for debugging
-          echo "~~~~ Cargo.toml ~~~~"
-          cat Cargo.toml
-          echo "~~~~~~~~~~~~~~~~~~~~"
-
-      # Run with all crate features
-      - name: ${{ matrix.crate }} - cargo test --all-features
-        uses: actions-rs/cargo@v1
-        with:
-          command: test
-          args: --manifest-path ${{ github.workspace }}/${{ matrix.crate }}/Cargo.toml --all-features
-
-  test_integration:
-    name: Integration tests
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os:
-          - windows-latest
-          - ubuntu-latest
-          - macos-latest
-    steps:
-      - uses: actions/checkout@master
-      - name: Install Rust
-        run: rustup update stable
-      - run: cargo install cargo-hack
-        name: Install cargo-hack
-      - uses: actions-rs/cargo@v1
-        name: cargo hack test --each-feature
-        with:
-          command: hack
-          args: test --manifest-path ${{ github.workspace }}/tests-integration/Cargo.toml --each-feature
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
deleted file mode 100644
index ba0b9da3..00000000
--- a/azure-pipelines.yml
+++ /dev/null
@@ -1,121 +0,0 @@
-trigger: ["master"]
-pr: ["master"]
-
-variables:
-  RUSTFLAGS: -Dwarnings
-  nightly: nightly-2020-05-29
-
-jobs:
-# Test top level crate
-- template: ci/azure-test-stable.yml
-  parameters:
-    name: test_tokio
-    rust: stable
-    displayName: Test tokio
-    cross: true
-    crates:
-      - tokio
-      - tests-integration
-
-# Test sub crates
-- template: ci/azure-test-stable.yml
-  parameters:
-    name: test_linux
-    displayName: Test sub crates -
-    rust: stable
-    crates:
-      - tokio-macros
-      - tokio-test
-      - tokio-util
-      - examples
-
-# Run integration tests
-- template: ci/azure-test-integration.yml
-  parameters:
-    name: test_integration
-    displayName: Integration tests
-    rust: stable
-
-# Run tests from `tests-build`. This requires a different process
-- template: ci/azure-test-build.yml
-  parameters:
-    name: test_build
-    displayName: Test build permutations
-    rust: stable
-
-# Run miri tests
-- template: ci/azure-miri.yml
-  parameters:
-    name: miri
-    rust: $(nightly)
-
-# Try cross compiling
-- template: ci/azure-cross-compile.yml
-  parameters:
-    name: cross
-    rust: stable
-
-# Check each feature works properly
-- template: ci/azure-check-features.yml
-  parameters:
-    rust: $(nightly)
-    name: check_features
-
-# This represents the minimum Rust version supported by
-# Tokio. Updating this should be done in a dedicated PR and
-# cannot be greater than two 0.x releases prior to the
-# current stable.
-#
-# Tests are not run as tests may require newer versions of
-# rust.
-- template: ci/azure-check-minrust.yml
-  parameters:
-    name: minrust
-    rust: 1.39.0
-
-# Check formatting
-- template: ci/azure-rustfmt.yml
-  parameters:
-    rust: stable
-    name: rustfmt
-
-# Apply clippy lints to all crates
-- template: ci/azure-clippy.yml
-  parameters:
-    rust: stable
-    name: clippy
-
-# Check doc generation
-- template: ci/azure-check-docs.yml
-  parameters:
-    rust: $(nightly)
-    name: docs
-
-# - template: ci/azure-tsan.yml
-#   parameters:
-#     name: tsan
-#     rust: stable
-
-# Run loom tests
-- template: ci/azure-loom.yml
-  parameters:
-    name: loom
-    rust: stable
-
-- template: ci/azure-deploy-docs.yml
-  parameters:
-    rust: stable
-    dependsOn:
-      - rustfmt
-      - docs
-      - clippy
-      - test_tokio
-      - test_linux
-      - test_integration
-      - test_build
-      - loom
-      - miri
-      - cross
-      - minrust
-      - check_features
-#      - tsan
diff --git a/ci/azure-cargo-check.yml b/ci/azure-cargo-check.yml
deleted file mode 100644
index 5bf7af20..00000000
--- a/ci/azure-cargo-check.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-parameters:
-  noDefaultFeatures: '--no-default-features'
-
-jobs:
-- job: ${{ parameters.name }}
-  displayName: ${{ parameters.displayName }}
-  pool:
-    vmImage: ubuntu-16.04
-  steps:
-  - template: azure-install-rust.yml
-    parameters:
-      rust_version: ${{ parameters.rust }}
-
-  - template: azure-is-release.yml
-
-  - ${{ each crate in parameters.crates }}:
-    - ${{ each feature in crate.value }}:
-      - script: cargo check ${{ parameters.noDefaultFeatures }} --features ${{ feature }}
-        displayName: Check `${{ crate.key }}`, features = ${{ feature }}
-        workingDirectory: $(Build.SourcesDirectory)/${{ crate.key }}
-        condition: and(succeeded(), not(variables['isRelease']))
-
-  - template: azure-patch-crates.yml
-
-  - ${{ each crate in parameters.crates }}:
-    - ${{ each feature in crate.value }}:
-      - script: cargo check ${{ parameters.noDefaultFeatures }} --features ${{ feature }}
-        displayName: Check `${{ crate.key }}`, features = ${{ feature }}
-        workingDirectory: $(Build.SourcesDirectory)/${{ crate.key }}
diff --git a/ci/azure-check-docs.yml b/ci/azure-check-docs.yml
deleted file mode 100644
index 6f94f339..00000000
--- a/ci/azure-check-docs.yml
+++ /dev/null
@@ -1,15 +0,0 @@
-jobs:
-# Check docs
-- job: ${{ parameters.name }}
-  displayName: Check docs
-  pool:
-    vmImage: ubuntu-16.04
-  steps:
-    - template: azure-install-rust.yml
-      parameters:
-        rust_version: ${{ parameters.rust }}
-
-    - script: |
-        RUSTDOCFLAGS="--cfg docsrs" cargo doc --lib --no-deps --all-features
-      displayName: Check docs
-
diff --git a/ci/azure-check-features.yml b/ci/azure-check-features.yml
deleted file mode 100644
index 98921300..00000000
--- a/ci/azure-check-features.yml
+++ /dev/null
@@ -1,38 +0,0 @@
-jobs:
-- job: ${{ parameters.name }}
-  displayName: Check features
-  strategy:
-    matrix:
-      Linux:
-        vmImage: ubuntu-16.04
-      MacOS:
-        vmImage: macos-latest
-      Windows:
-        vmImage: vs2017-win2016
-  pool:
-    vmImage: $(vmImage)
-
-  steps:
-  - template: azure-install-rust.yml
-    parameters:
-      rust_version: ${{ parameters.rust }}
-
-  - template: azure-patch-crates.yml
-
-  - script: cargo install cargo-hack
-    displayName: Install cargo-hack
-
-  # Check each feature works properly
-  # * --each-feature
-  #   run for each feature which includes --no-default-features and default features of package
-  # * -Z avoid-dev-deps
-  #   build without dev-dependencies to avoid https://github.com/rust-lang/cargo/issues/4866
-  #   tracking-issue: https://github.com/rust-lang/cargo/issues/5133
-  - script: cargo hack check --all --each-feature -Z avoid-dev-deps
-    displayName: cargo hack check --all --each-feature
-
-  # Try with unstable feature flags
-  - script: cargo hack check --all --each-feature -Z avoid-dev-deps
-    displayName: cargo hack check --all --each-feature
-    env:
-      RUSTFLAGS: '--cfg tokio_unstable'
diff --git a/ci/azure-check-minrust.yml b/ci/azure-check-minrust.yml
deleted file mode 100644
index 1a28f53b..00000000
--- a/ci/azure-check-minrust.yml
+++ /dev/null
@@ -1,14 +0,0 @@
-jobs:
-- job: ${{ parameters.name }}
-  displayName: Min supported Rust version
-  pool:
-    vmImage: ubuntu-16.04
-  steps:
-  - template: azure-install-rust.yml
-    parameters:
-      rust_version: ${{ parameters.rust }}
-
-  - template: azure-patch-crates.yml
-
-  - script: cargo check --all
-    displayName: cargo check --all
diff --git a/ci/azure-clippy.yml b/ci/azure-clippy.yml
deleted file mode 100644
index b843223f..00000000
--- a/ci/azure-clippy.yml
+++ /dev/null
@@ -1,16 +0,0 @@
-jobs:
-- job: ${{ parameters.name }}
-  displayName: Clippy
-  pool:
-    vmImage: ubuntu-16.04
-  steps:
-    - template: azure-install-rust.yml
-      parameters:
-        rust_version: ${{ parameters.rust }}
-    - script: |
-        rustup component add clippy
-        cargo clippy --version
-      displayName: Install clippy
-    - script: |
-        cargo clippy --all --all-features --tests
-      displayName: cargo clippy --all --tests
diff --git a/ci/azure-cross-compile.yml b/ci/azure-cross-compile.yml
deleted file mode 100644
index 11c530ca..00000000
--- a/ci/azure-cross-compile.yml
+++ /dev/null
@@ -1,44 +0,0 @@
-jobs:
-- job: ${{ parameters.name }}
-  displayName: ${{ parameters.displayName }}
-  strategy:
-    matrix:
-      i686:
-        vmImage: ubuntu-16.04
-        target: i686-unknown-linux-gnu
-      powerpc:
-        vmImage: ubuntu-16.04
-        target: powerpc-unknown-linux-gnu
-      powerpc64:
-        vmImage: ubuntu-16.04
-        target: powerpc64-unknown-linux-gnu
-      mips:
-        vmImage: ubuntu-16.04
-        target: mips-unknown-linux-gnu
-      arm:
-        vmImage: ubuntu-16.04
-        target: arm-linux-androideabi
-  pool:
-    vmImage: $(vmImage)
-  steps:
-  - template: azure-install-rust.yml
-    parameters:
-      rust_version: ${{ parameters.rust }}
-
-  - script: sudo apt-get update
-    displayName: apt-get update
-
-  - script: sudo apt-get install gcc-multilib
-    displayName: Install gcc-multilib
-
-  - script: cargo install cross
-    displayName: Install cross
-
-  # Always patch
-  - template: azure-patch-crates.yml
-
-  - script: cross check --all --target $(target)
-    displayName: Check source
-
-  # - script: cross check --tests --all --target $(target)
-  #   displayName: Check tests
diff --git a/ci/azure-deploy-docs.yml b/ci/azure-deploy-docs.yml
deleted file mode 100644
index 77ec1b0f..00000000
--- a/ci/azure-deploy-docs.yml
+++ /dev/null
@@ -1,39 +0,0 @@
-parameters:
-  dependsOn: []
-
-jobs:
-- job: documentation
-  displayName: 'Deploy API Documentation'
-  condition: and(succeeded(), eq(variables['Build.SourceBranch'], 'refs/heads/master'))
-  pool:
-    vmImage: 'Ubuntu 16.04'
-  dependsOn:
-    - ${{ parameters.dependsOn }}
-  steps:
-  - template: azure-install-rust.yml
-    parameters:
-      # rust_version: stable
-      rust_version: ${{ parameters.rust }}
-  - script: |
-      cargo doc --all --no-deps --all-features
-      cp -R target/doc '$(Build.BinariesDirectory)'
-    displayName: 'Generate Documentation'
-  - script: |
-      set -e
-
-      git --version
-      ls -la
-      git init
-      git config user.name 'Deployment Bot (from Azure Pipelines)'
-      git config user.email 'deploy@tokio-rs.com'
-      git config --global credential.helper 'store --file ~/.my-credentials'
-      printf "protocol=https\nhost=github.com\nusername=carllerche\npassword=%s\n\n" "$GITHUB_TOKEN" | git credential-store --file ~/.my-credentials store
-      git remote add origin https://github.com/tokio-rs/tokio
-      git checkout -b gh-pages
-      git add .
-      git commit -m 'Deploy Tokio API documentation'
-      git push -f origin gh-pages
-    env:
-      GITHUB_TOKEN: $(githubPersonalToken)
-    workingDirectory: '$(Build.BinariesDirectory)'
-    displayName: 'Deploy Documentation'
diff --git a/ci/azure-install-rust.yml b/ci/azure-install-rust.yml
deleted file mode 100644
index 4cf5ca3f..00000000
--- a/ci/azure-install-rust.yml
+++ /dev/null
@@ -1,40 +0,0 @@
-steps:
-  # Linux and macOS.
-  - script: |
-      set -e
-
-      if [ "$RUSTUP_TOOLCHAIN" == "nightly" ]; then
-        echo "++ getting latest miri version"
-        export RUSTUP_TOOLCHAIN="nightly-$(curl -s https://rust-lang.github.io/rustup-components-history/x86_64-unknown-linux-gnu/miri)"
-        echo "$RUSTUP_TOOLCHAIN"
-      fi
-
-      curl https://sh.rustup.rs -sSf | sh -s -- -y --profile minimal --default-toolchain none
-      export PATH=$PATH:$HOME/.cargo/bin
-      rustup toolchain install $RUSTUP_TOOLCHAIN
-      rustup default $RUSTUP_TOOLCHAIN
-      echo "##vso[task.setvariable variable=PATH;]$PATH:$HOME/.cargo/bin"
-    env:
-      RUSTUP_TOOLCHAIN: ${{parameters.rust_version}}
-    displayName: "Install rust (*nix)"
-    condition: not(eq(variables['Agent.OS'], 'Windows_NT'))
-
-  # Windows.
-  - script: |
-      curl -sSf -o rustup-init.exe https://win.rustup.rs
-      rustup-init.exe -y --profile minimal --default-toolchain none
-      set PATH=%PATH%;%USERPROFILE%\.cargo\bin
-      rustup toolchain install %RUSTUP_TOOLCHAIN%
-      rustup default %RUSTUP_TOOLCHAIN%
-      echo "##vso[task.setvariable variable=PATH;]%PATH%;%USERPROFILE%\.cargo\bin"
-    env:
-      RUSTUP_TOOLCHAIN: ${{parameters.rust_version}}
-    displayName: "Install rust (windows)"
-    condition: eq(variables['Agent.OS'], 'Windows_NT')
-
-  # All platforms.
-  - script: |
-        rustup toolchain list
-        rustc -Vv
-        cargo -V
-    displayName: Query rust and cargo versions
diff --git a/ci/azure-is-release.yml b/ci/azure-is-release.yml
deleted file mode 100644
index d7271b34..00000000
--- a/ci/azure-is-release.yml
+++ /dev/null
@@ -1,9 +0,0 @@
-steps:
-  - bash: |
-      set -e
-
-      if git log --no-merges -1 --format='%B' | grep -qF '[ci-release]'; then
-        echo "##vso[task.setvariable variable=isRelease]true"
-      fi
-    failOnStderr: true
-    displayName: Check if release commit
diff --git a/ci/azure-loom.yml b/ci/azure-loom.yml
deleted file mode 100644
index df02711b..00000000
--- a/ci/azure-loom.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-jobs:
-- job: ${{ parameters.name }}
-  displayName: Loom tests
-  strategy:
-    matrix:
-      rest:
-        scope: --skip loom_pool
-      pool_group_a:
-        scope: loom_pool::group_a
-      pool_group_b:
-        scope: loom_pool::group_b
-      pool_group_c:
-        scope: loom_pool::group_c
-      pool_group_d:
-        scope: loom_pool::group_d
-  pool:
-    vmImage: ubuntu-16.04
-
-  steps:
-  - template: azure-install-rust.yml
-    parameters:
-      rust_version: ${{ parameters.rust }}
-
-  - script: RUSTFLAGS="--cfg loom --cfg tokio_unstable" cargo test --lib --release --features "full" -- --nocapture $(scope)
-    env:
-      LOOM_MAX_PREEMPTIONS: 2
-      CI: 'True'
-    displayName: $(scope)
-    workingDirectory: $(Build.SourcesDirectory)/tokio
diff --git a/ci/azure-miri.yml b/ci/azure-miri.yml
deleted file mode 100644
index 05bc973b..00000000
--- a/ci/azure-miri.yml
+++ /dev/null
@@ -1,23 +0,0 @@
-jobs:
-- job: ${{ parameters.name }}
-  displayName: Miri
-  pool:
-    vmImage: ubuntu-16.04
-
-  steps:
-  - template: azure-install-rust.yml
-    parameters:
-      rust_version: ${{ parameters.rust }}
-
-  - script: |
-      rustup component add miri
-      cargo miri setup
-      rm -rf $(Build.SourcesDirectory)/tokio/tests
-    displayName: Install miri
-
-  # TODO: enable all tests once they pass
-  - script: cargo miri test --features rt-core,rt-threaded,rt-util,sync -- -- task
-    env:
-      CI: 'True'
-    displayName: cargo miri test
-    workingDirectory: $(Build.SourcesDirectory)/tokio
diff --git a/ci/azure-patch-crates.yml b/ci/azure-patch-crates.yml
deleted file mode 100644
index 7bf96e60..00000000
--- a/ci/azure-patch-crates.yml
+++ /dev/null
@@ -1,16 +0,0 @@
-steps:
-  - script: |
-      set -e
-
-      # Remove any existing patch statements
-      mv Cargo.toml Cargo.toml.bck
-      sed -n '/\[patch.crates-io\]/q;p' Cargo.toml.bck > Cargo.toml
-
-      # Patch all crates
-      cat ci/patch.toml >> Cargo.toml
-
-      # Print `Cargo.toml` for debugging
-      echo "~~~~ Cargo.toml ~~~~"
-      cat Cargo.toml
-      echo "~~~~~~~~~~~~~~~~~~~~"
-    displayName: Patch Cargo.toml
diff --git a/ci/azure-rustfmt.yml b/ci/azure-rustfmt.yml
deleted file mode 100644
index f8e79d72..00000000
--- a/ci/azure-rustfmt.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-jobs:
-# Check formatting
-- job: ${{ parameters.name }}
-  displayName: Check rustfmt
-  pool:
-    vmImage: ubuntu-16.04
-  steps:
-    - template: azure-install-rust.yml
-      parameters:
-        rust_version: ${{ parameters.rust }}
-    - script: |
-        rustup component add rustfmt
-        cargo fmt --version
-      displayName: Install rustfmt
-    - script: |
-        # Workaround for rust-lang/cargo#7732
-        rustfmt --check --edition 2018 $(find . -name '*.rs' -print)
-      displayName: Check formatting
diff --git a/ci/azure-test-build.yml b/ci/azure-test-build.yml
deleted file mode 100644
index 944b9e24..00000000
--- a/ci/azure-test-build.yml
+++ /dev/null
@@ -1,17 +0,0 @@
-jobs:
-- job: ${{ parameters.name }}
-  displayName: ${{ parameters.displayName }}
-  pool:
-    vmImage: 'Ubuntu 16.04'
-
-  steps:
-  - template: azure-install-rust.yml
-    parameters:
-      rust_version: ${{ parameters.rust }}
-
-  - script: cargo install cargo-hack
-    displayName: Install cargo-hack
-
-  - script: cargo hack test --each-feature
-    displayName: cargo hack test --each-feature
-    workingDirectory: $(Build.SourcesDirectory)/tests-build
diff --git a/ci/azure-test-integration.yml b/ci/azure-test-integration.yml
deleted file mode 100644
index f498a649..00000000
--- a/ci/azure-test-integration.yml
+++ /dev/null
@@ -1,28 +0,0 @@
-jobs:
-- job: ${{ parameters.name }}
-  displayName: ${{ parameters.displayName }}
-  strategy:
-    matrix:
-      Linux:
-        vmImage: ubuntu-16.04
-      MacOS:
-        vmImage: macos-latest
-      Windows:
-        vmImage: vs2017-win2016
-  pool:
-    vmImage: $(vmImage)
-
-  steps:
-  - template: azure-install-rust.yml
-    parameters:
-      rust_version: ${{ parameters.rust }}
-
-  - script: cargo install cargo-hack
-    displayName: Install cargo-hack
-
-  # Run with all crate features
-  - script: cargo hack test --each-feature
-    env:
-      CI: 'True'
-    displayName: cargo hack test --each-feature
-    workingDirectory: $(Build.SourcesDirectory)/tests-integration
diff --git a/ci/azure-test-nightly.yml b/ci/azure-test-nightly.yml
deleted file mode 100644
index bbb44442..00000000
--- a/ci/azure-test-nightly.yml
+++ /dev/null
@@ -1,19 +0,0 @@
-jobs:
-- job: ${{ parameters.name }}
-  displayName: ${{ parameters.displayName }}
-  pool:
-    vmImage: ubuntu-16.04
-
-  steps:
-  - template: azure-install-rust.yml
-    parameters:
-      rust_version: ${{ parameters.rust }}
-
-  - template: azure-patch-crates.yml
-
-  - script: cargo check --all
-    displayName: cargo check --all
-
-  # Check benches
-  - script: cargo check --benches --all
-    displayName: Check benchmarks
diff --git a/ci/azure-test-stable.yml b/ci/azure-test-stable.yml
deleted file mode 100644
index 55aa84e0..00000000
--- a/ci/azure-test-stable.yml