Linux 7.2 ships cache-aware scheduling, and Torvalds calls AI bug reports the new normal

Linus Torvalds released Linux kernel 7.2 over the weekend, with Cache Aware Scheduling as the marquee addition ^[1][2]. For anyone packing many threads onto one socket, that is a throughput gain for the price of an upgrade; the more consequential line is elsewhere in his notes, where Torvalds describes AI-generated bug reports as a permanent condition of the release cycle rather than a spike ^[3].

The scheduler work is not new. The patch series has been in progress for several years ^[2]. Previously the load balancer spread threads across cores without checking whether threads on separate cores shared memory, so those cores re-fetched the same data and the system paid repeatedly for the same lines, a pattern known as cache bouncing ^[4]. Torvalds describes the goal as aggregating "tasks sharing data to the same LLC cache domain, thereby reducing cache bouncing and cache misses, and improving data access efficiency" ^[5]. The guardrails are what make this a multi-tenant feature rather than a benchmark result: the code avoids overloading a cache domain, and stops moving threads once a process consumes more than 25% of CPU time or more than one-third of a domain's load ^[6]. According to ZDNET, multithreaded servers, AI and ML compute jobs, and some games stand to benefit most ^[7].

The release note is blunter about process than about performance. Torvalds wrote that the last week of the release was "once again -- bigger than I would have wished for," adding that with "the whole 'new normal' thing," delaying releases for that reason would mean never releasing at all ^[8]. At release candidate seven he had already defined the term: "the new normal with a lot of fixes, many of them due to review by various AI tools" ^[3]. These are largely not features written by AI but patches for AI-discovered security vulnerabilities ^[9]. His objection is to how they are routed: "This is all entirely pointless churn, and we're making it clear that AI-detected bugs are pretty much by definition not secret, and treating them on some private list is a waste of time for everybody involved - and only makes that duplication worse because the reporters can't even see each other's reports" ^[10]. He is not banning the tools, telling contributors to "use them in a way that is productive and makes for a better experience" ^[11]. The operational reading is his own: the tail end of a cycle now routinely carries more fixes than the maintainer wants ^[8].

Elsewhere, exFAT moves to the kernel's iomap, which ZDNET reports improves read and write speed on SD cards and USB sticks by as much as 87% ^[12]. Experimental folios up to 2 MB arrive, and iomap conversion work continues for ext4 and XFS ^[13][14]. There is initial AMDGPU support for HDMI 2.1 Fixed Rate Link, enabling uncompressed 4K at 120Hz and 8K ^[15], Intel's USB4STREAM for raw host-to-host transfer over USB4 and Thunderbolt links that bypasses the networking stack ^[16], plus Wi-Fi Aware and early Wi-Fi 8 groundwork ^[17].

Two things to watch. Whether the security list handling for AI-detected bugs actually changes, since Torvalds has now said publicly that the private-list route makes duplication worse ^[10]. And whether the scheduler gain survives contact with real tenancy: most users will not see 7.2 until fall distributions such as Ubuntu 26.10, and the benefits are concentrated in machines with complex CPU-cache layouts and storage-heavy workloads ^[18][19].