Linux 7.3 Brings GPU Memory Recovery, New Device Support, and FAMFS Groundwork

Linux 7.3’s merge window is shaping up as a broad hardware and infrastructure release rather than a single-feature upgrade. The headline changes span GPU support, memory management for gaming, handheld and peripheral input, security hardening, filesystem maintenance, and preparation for servers built around fabric-attached memory.

The merge window is the point in the kernel development cycle when the bulk of major, sufficiently reviewed changes are accepted. It normally lasts about two weeks, after which the project moves into release-candidate testing and stabilization. 4550

The biggest gaming change: reclaiming GPU memory under pressure

Games that use more graphics memory than a system has available can experience severe performance problems or fail outright. Linux 7.3 is set to improve this situation through DMEMCG eviction, work led by Valve’s Natalie Vock that allows device memory to be reclaimed more effectively when applications exceed available VRAM. The initial implementation is expected to work with AMDGPU and Intel graphics. 6

This does not increase a graphics card’s physical VRAM. Instead, it improves how the kernel responds when memory demand outgrows the available pool. That distinction matters: the likely benefit is more graceful memory pressure and fewer catastrophic slowdowns, not a replacement for having more VRAM.

The graphics memory allocator is also being made more aggressive when allocating below protection limits. These TTM and device-memory cgroup changes are intended to give the kernel more flexibility when managing graphics memory. 5

AMD, Intel, and Nvidia graphics work

AMDGPU gains additional hardware enablement

AMD’s Linux graphics work includes further display and hardware enablement, including support for DCN 6.0-related functionality. Additional AMD graphics driver updates were submitted ahead of the merge window. 111

Intel Nova Lake graphics become easier to use

One of the clearest end-user changes is on Intel’s side. Linux 7.3 removes Nova Lake-S from the Intel Xe driver’s force-probe list, allowing supported integrated graphics to be detected and initialized by default rather than requiring a manual activation option. 36

The DRM updates also describe next-generation Nova Lake graphics as stable and enabled by default, although users should still expect distribution kernels to determine when the support becomes available in practice. 6

Nvidia support continues through Nova/Nouveau

Nvidia-related development remains part of the broader graphics work, with progress continuing in the Rust-based Nova/Nouveau driver effort. The available reporting describes this as ongoing development rather than a complete replacement for Nvidia’s existing driver options. 1

New support for handhelds and programmable peripherals

Linux 7.3 is also expanding support for the devices people use to play and control modern systems.

• The new MSI Claw HID driver is intended to provide mainline support for controller configuration and RGB lighting on compatible handheld hardware. The work was developed with Valve and other contributors. 1336
• Logitech HID++ 2.0 reprogrammable-button support allows software to query, remap, and divert supported mouse buttons and special keyboard keys. 33
• Input-core changes improve device opening, closing, and inhibition so devices are fully ready before events are delivered. 31

These changes are small compared with a graphics subsystem update, but they address a recurring Linux usability problem: hardware may function at a basic level while vendor-specific controls remain unavailable. Mainline support can reduce that gap for compatible devices.

Security and reliability hardening in the input stack

The input updates include a security fix for the PS/2 mouse driver, which is being hardened against a potential use-after-free during protocol disconnection. Other PS/2 fixes address possible underflow conditions, including in the FocalTech driver. 31

Linux 7.3 is also adding reporting support for Lenovo ThinkPad USB-C Security Restricted Mode. On compatible systems, the mode can keep USB-C power delivery active while disabling USB data connections. That is designed for scenarios such as kiosks or physically secured environments where USB transfers or untrusted USB devices should be restricted. 34

Two old filesystems are being removed

The kernel is dropping the unmaintained SGI IRIX Extent File System, or EFS, and the FreeVxFS driver for Veritas VxFS-compatible filesystems. Once Linux 7.3 is in use, these formats will no longer be mountable through those in-kernel drivers. 9

This is mainly a maintenance decision, but it has a practical consequence for administrators and archivists: systems that still need raw EFS or old Veritas volumes will need an alternative access path before upgrading to a kernel without these drivers.

FailFS is not a normal storage filesystem

Linux 7.3 is also adding FailFS, a compact pseudo-filesystem designed for a specialized kernel task rather than for storing user data. Every operation reaching FailFS returns EOPNOTSUPP, the Linux error code for an unsupported operation. 3241

The purpose is to give kernel tasks a controlled way to shed filesystem state and references. A process whose root or working directory is placed in FailFS must use an explicit file descriptor for path lookups; ordinary absolute paths and AT_FDCWD-relative lookups fail. 32

That makes FailFS more like a safety and lifecycle mechanism than a filesystem users would mount to manage files. It is being added alongside NullFS as part of the kernel’s internal infrastructure. 13

DAX and NVDIMM changes prepare for fabric-attached memory

Another important part of the cycle is less visible to desktop users. Linux 7.3 includes DAX and NVDIMM fixes, refactoring, and related improvements that prepare the kernel for Micron’s proposed FAMFS filesystem. 20

FAMFS is intended for fabric-attached memory, particularly disaggregated-memory environments associated with Compute Express Link, or CXL, servers. Unlike a conventional local disk filesystem, the design targets shared memory resources that can be accessed across a fabric. 192027

The key caveat is that FAMFS itself is not being merged as part of these Linux 7.3 preparations. The current changes are groundwork for a future submission and should not be read as complete FAMFS support in the kernel release. 20

When should Linux 7.3 arrive?

Linux 7.2 was released on August 16, 2026, and the Linux 7.3 merge window opened immediately afterward. 710

The first release candidate, Linux 7.3-rc1, is expected around Sunday, August 30. That estimate follows the project’s usual roughly two-week merge window, but it is still a projection rather than a guaranteed release date. 7455054

Current schedule estimates place the stable Linux 7.3 release in late October, with October 18 or October 25 listed as possible dates. Those dates can change if additional stabilization work is needed. 2754

For users, the practical takeaway is straightforward: Linux 7.3 is bringing immediate hardware and gaming improvements, but it is also laying less visible groundwork for a future memory architecture in which storage, accelerators, and memory are increasingly connected through high-speed fabrics.