Luke Sandberg 97e7d901c8 turbo-tasks: explicit GC root anchoring + cross-session orphan reclamation (#96857) ...

### What?

Reworks how the reference-counting GC decides what is a **root** (a task
that must not be collected), and adds a durable path to reclaim
cross-session orphaned roots

Currently GC roots are persisted and the only way to get collected is
for another session to revive them, and then for their ref-counts to
drop. This provides a new mechanism.

1. **In-session** — Top level operations get reference counted so they
can be dropped in session.
2. **Cross-session** — live roots are recorded along with a simple aging
mechanism so they can still be collected even if a later session never
restores it.

### Why?
This closes the final GC gap. Top level operations are ambiguous
currently and need tracking. With cross session aging we close a basic
gap where if you delete a route between sessions we never clean up the
tasks. Now it will eventually age out.

### How?

**Roots are anchored explicitly**. Via pins and RAII guards like
`GcRoot`

**Persisted roots set + TTL age-out** A new Infra-keyspace `GcRoots`
entry persists `Vec<(TaskId, ttl)>`. That allows us to detect when roots
are stale and can be dropped.

**Dispose transient root tasks on drop.** `RootTask::Drop` now disposes
tasks and cleans up references allowing the GC to work

2026-09-08 09:03:09 -07:00

..

src

turbo-tasks: explicit GC root anchoring + cross-session orphan reclamation (#96857)

2026-09-08 09:03:09 -07:00

build.rs

Turbopack: more strict vergen setup (#93541)

2026-05-07 08:50:02 +00:00

Cargo.toml

Enable mimalloc in benchmarks (#93388)

2026-05-19 18:31:51 -07:00