fix(scheduler): include init container requests in device locking - #2755
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Included review availability: Your plan provides up to 8 included reviews per hour; 6 remain after this review. 📝 WalkthroughWalkthroughThe change adds shared pod device detection across init and regular containers. Supported device backends use this check before node lock operations. Tests cover lock acquisition and release for both container types. ChangesDevice node locking
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: 🟡 Moderate · up to The scheduler fix correctly extends device locking to init-container requests, but a duplicate test function in the NVIDIA device tests prevents the package from type-checking. Merge should wait until the test issue is removed or explicitly accepted. Suggested reviewers: Poem
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Inline comments:
In `@pkg/device/nvidia/device_test.go`:
- Around line 2263-2355: Remove the duplicate TestReleaseNodeLock declaration so
the package contains only one function with that name. Merge these cases into
the existing test or rename this test while preserving all coverage and avoiding
duplicate Go test symbols.
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pkg/device/amd/device.gopkg/device/ascend/device.gopkg/device/biren/device.gopkg/device/biren/device_test.gopkg/device/cambricon/device.gopkg/device/devices.gopkg/device/devices_test.gopkg/device/hygon/device.gopkg/device/hygon/device_test.gopkg/device/iluvatar/device.gopkg/device/kunlun/vdevice.gopkg/device/kunlun/vdevice_test.gopkg/device/metax/sdevice.gopkg/device/nvidia/device.gopkg/device/nvidia/device_test.gopkg/device/vastai/device.go
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Device backends (nvidia, hygon, cambricon, iluvatar, biren, metax, kunlun, amd, ascend, vastai) previously checked only p.Spec.Containers when deciding whether to call nodelock.LockNode / ReleaseNodeLock. Pods that request GPUs or other accelerators exclusively via InitContainers therefore never acquired the node lock, creating a scheduling race with other pods targeting the same node. Introduce a shared helper PodRequiresDevice(dev Devices, p *corev1.Pod) in pkg/device/devices.go that iterates both p.Spec.InitContainers and p.Spec.Containers, and replace the duplicated per-backend loops with a single call to this helper in LockNode and ReleaseNodeLock across all 10 affected backends. Regression tests added: - TestPodRequiresDevice in pkg/device/devices_test.go - TestLockNode in nvidia/device_test.go extended with init-only and init+regular GPU request cases - TestReleaseNodeLock added to nvidia/device_test.go - TestDevices_LockNode in hygon/device_test.go extended with init-container and init+regular cases - TestDevices_ReleaseNodeLock in hygon/device_test.go extended with per-case lock annotations and an init-container release case Fixes: Project-HAMi#2745 Signed-off-by: AyushSrivastava1818 <ayush.sri0705@gmail.com>
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: archlitchi, AyushSrivastava1818 The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
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3 participants
What type of PR is this?
/kind bug
What this PR does / why we need it
HAMi's resource request calculation accounts for device requests from both init containers and regular containers. However, the device node-locking implementations were checking only
pod.Spec.Containers.As a result, a pod with a HAMi GPU/device request exclusively in an init container could be scheduled and have its resources accounted for without acquiring the corresponding device node lock.
This creates an inconsistency between resource accounting and node locking and can allow concurrent scheduling operations to bypass the synchronization intended for device allocation.
Changes
PodRequiresDevice()inpkg/device/devices.goto determine whether a pod requires a particular device.InitContainersand regularContainers.LockNode()andReleaseNodeLock().Affected device backends
Which issue(s) does this PR fix?
Fixes #2745
Regression coverage
The tests cover:
LockNode()behavior.ReleaseNodeLock()behavior.The init-container-only regression cases fail against the previous
Spec.Containers-only implementation and pass with this fix.Validation
go test ./pkg/device/...— 12/13 packages passed.go vet ./pkg/device/{amd,ascend,biren,cambricon,hygon,iluvatar,kunlun,metax,vastai}/...— passed.git diff --check— passed.gofmt— verified.Does this PR introduce a user-facing change?
No.
This is a scheduler/device-locking correctness fix. It ensures that init-container device requests receive the same node-lock treatment as equivalent regular-container requests.
Special notes for reviewers
The fix intentionally centralizes device-request detection instead of maintaining separate
InitContainers/Containersloops across each device backend.PodRequiresDevice()uses the sameGenerateResourceRequests()semantics as the existing resource-request calculation and checks init containers before regular containers.Cambricon's existing unconditional
ReleaseNodeLock()behavior is preserved because its locking mechanism differs from the pod-keyed node-lock implementation used by the other affected backends.No changes were made to the node-lock recovery implementation from PR #2733.
AI Assistance Disclosure
AI assistance from Claude and Antigravity was used during codebase investigation, root-cause analysis, implementation assistance, regression-test development, code review, and validation of this change.
The final implementation was reviewed against the existing HAMi codebase and device-locking behavior. The contributor independently verified the affected backends, confirmed that the shared helper matches the existing resource-request semantics, reviewed the resulting diff, and ran the relevant tests, vet, formatting, and diff checks.
Summary by CodeRabbit
Bug Fixes
Tests