Linux Kernel Daily: Memory Cleanup and Zero-Copy I/O Push
Memory management dominates this cycle with an explicit V-M-A flag overhaul, huge-page collapse separation, and major performance and data-loss fixes. Storage and tracing advance in parallel with native dma-buf I-O for io_uring, large-folio groundwork in FUSE and F-2-F-S, and safer boot-time event filtering.
Duration: PT2M36S
Episode overview
This episode is a short developer briefing from Linux Kernel Daily.
It explains recent repository work in plain language.
- Show: Linux Kernel Daily
- Published: 2026-10-28T06:01:49Z
- Audio duration: PT2M36S
Transcript excerpt
This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.
Hello, it's October 28th, 2026, you're listening to Linux Kernel Daily.
The lead story is memory: the biggest memory management pull this cycle rewrites unclear mapping semantics, separates huge-page policy from mechanism, and fixes real data-loss and stall risks, while storage moves toward zero-copy and large pages.
First, memory ownership gets explicit. The merge tagged M-M stable replaces the ambiguous V-M special flag with helpers that describe who owns a mapping, enforces mapping flag rules across drivers, and unifies direct access and huge T-L-B virtual memory map paths. It also splits huge-page collapse so scanning,…
Second, high-speed I-O goes more direct. The io_uring dma-buf pull adds file I-O infrastructure for dma-buf maps, a new iterator and block-layer bio type, raw block device support, and an N-V-M-E PCI backend with scatter-gather support. FUSE adds direct-access backing, extent maps including striped layouts, and…
Third, observability and hardening. Tracing gains a within filter to capture events occurring inside a named function, plus filtering at boot when enabling events, alongside histogram, ring-buffer naming, and out-of-bounds filter fixes. The keyring change…
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