Sebastien Boeuf 6ef9b58615 vmm: Prefault snapshot pages in background ...

Userfaultfd is a great mechanism for providing fast restore to Cloud
Hypervisor VMs. But that means the price to pay for bringing pages in
happens at runtime, which might slow down the guest when it's touching
pages which haven't been brought in yet.

By prefaulting the pages in the background, we're trying to get the best
of both worlds. That means we still get a very fast restore with the
uffd handler, but within a few seconds (depending on VM's RAM size), we
also get the pages fully faulted and we can stop the uffd handler thread
at that point.

Signed-off-by: Sebastien Boeuf <sboeuf@meta.com>
Assisted-by: Claude:claude-opus-4-7

2026-05-19 12:54:55 +00:00

..

src

vmm: Prefault snapshot pages in background

2026-05-19 12:54:55 +00:00

build.rs

build: Add "fuzzing" as a valid cfg(..) attribute

2024-05-08 08:10:28 +00:00

Cargo.toml

build(deps): bump the non-rust-vmm group across 2 directories with 11 updates

2026-05-08 00:48:40 +00:00