Linux Kernel Daily: Page Allocator Races and Filesystem Hardening
Merges center on stable reliability, led by page allocator fixes for hotplug races that could trigger crashes or wrong-node allocations, alongside VFS correctness fixes and Xen and I O M M U security mitigations.
Duration: PT2M19S
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: 2026-11-11T06:00:48Z
- Audio duration: PT2M19S
Transcript excerpt
This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.
Good morning for Wednesday, November 11th, 2026, you're listening to Linux Kernel Daily.
The dominant pattern is defense against concurrency bugs, with the memory allocator learning to detect and retry when hotplug rebuilds its core structures.
First, memory management. The page allocator merge tracked as commit 067c5c2 closes stable races where reading zone lists during hotplug could cause crashes, failed allocations, or allocations from the wrong node. The fix snapshots the preferred zone, reads list entries once, and retries allocations and huge page…
Second, filesystems and core I O. The V F S merge brings a faster, correct directory listing on temporary file systems by walking in offset order, cutting a million-entry listing from 146 to 114 milliseconds. It also fixes a socket splice bug where the last buffer was counted twice, leaving message-more set and…
Finally, hardware and virtualization. A M D's I O M M U is forced to maximum device table size to mitigate C V E 2024 dash 21963, an out-of-bounds read guests could exploit, with a warning to update production and crash kernels together to avoid kdump failures. Xen netback fixes, tracked as X S A 531 and 532, stop a…
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