feat: add config option to enable transparent huge pages #5495
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Add a new machine-config field, `enable_thp`, that controls whether transparent huge pages (THP) is enabled for the microVM. Signed-off-by: Heyang Zhou <hello@su3.io>
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Changes
Add a new machine-config field,
enable_thp, that controls whether transparent huge pages (THP) is enabled for the microVM.Reason
Currently, even for a VM that is not restored from a snapshot and not using any vhost-user devices, Firecracker does not attempt to enable transparent huge pages for it. This makes it necessary to reserve hugetlb pages on hypervisor host machines, making things hard on hosts that run mixed workloads.
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CONTRIBUTING.md.PR Checklist
tools/devtool checkbuild --allto verify that the PR passesbuild checks on all supported architectures.
tools/devtool checkstyleto verify that the PR passes theautomated style checks.
how they are solving the problem in a clear and encompassing way.
in the PR.
CHANGELOG.md.Runbook for Firecracker API changes.
integration tests.
TODO.rust-vmm.