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4th chunk of `content/manuals/engine/release-notes/17.12.md`
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* Bump Go to 1.9.2 [moby/moby#33892](https://github.com/moby/moby/pull/33892) [docker/cli#716](https://github.com/docker/cli/pull/716)
* `/dev` should not be readonly with `--readonly` flag [moby/moby#35344](https://github.com/moby/moby/pull/35344)
+ Add custom build-time Graphdrivers priority list [moby/moby#35522](https://github.com/moby/moby/pull/35522)
* LCOW: CLI changes to add platform flag - pull, run, create and build [docker/cli#474](https://github.com/docker/cli/pull/474)
* Fix width/height on Windows for `docker exec` [moby/moby#35631](https://github.com/moby/moby/pull/35631)
* Detect overlay2 support on pre-4.0 kernels [moby/moby#35527](https://github.com/moby/moby/pull/35527)
* Devicemapper: remove container rootfs mountPath after umount [moby/moby#34573](https://github.com/moby/moby/pull/34573)
* Disallow overlay/overlay2 on top of NFS [moby/moby#35483](https://github.com/moby/moby/pull/35483)
- Fix potential panic during plugin set. [moby/moby#35632](https://github.com/moby/moby/pull/35632)
- Fix some issues with locking on the container [moby/moby#35501](https://github.com/moby/moby/pull/35501)
- Fixup some issues with plugin refcounting [moby/moby#35265](https://github.com/moby/moby/pull/35265)
+ Add missing lock in ProcessEvent [moby/moby#35516](https://github.com/moby/moby/pull/35516)
+ Add vfs quota support [moby/moby#35231](https://github.com/moby/moby/pull/35231)
* Skip empty directories on prior graphdriver detection [moby/moby#35528](https://github.com/moby/moby/pull/35528)
* Skip xfs quota tests when running in user namespace [moby/moby#35526](https://github.com/moby/moby/pull/35526)
+ Added SubSecondPrecision to config option. [moby/moby#35529](https://github.com/moby/moby/pull/35529)
* Update fsnotify to fix deadlock in removing watch [moby/moby#35453](https://github.com/moby/moby/pull/35453)
- Fix "duplicate mount point" when `--tmpfs /dev/shm` is used [moby/moby#35467](https://github.com/moby/moby/pull/35467)
- Fix honoring tmpfs-size for user `/dev/shm` mount [moby/moby#35316](https://github.com/moby/moby/pull/35316)
Title: Docker Engine Runtime Updates and Fixes
Summary
This section covers updates and fixes related to the Docker Engine runtime. It includes bumping the Go version to 1.9.2, ensuring `/dev` is not read-only with the `--readonly` flag, and adding a custom build-time Graphdrivers priority list. Other changes involve LCOW CLI updates, fixing width/height issues for `docker exec` on Windows, detecting overlay2 support on older kernels, and improving devicemapper functionality. The updates also address potential panics, locking issues, plugin refcounting, and tmpfs mount problems, alongside adding vfs quota support and enhancing configuration options.