Linux Kernel Daily: Memory Management Cleanup Batch
A twenty-patch memory management hotfix pull from Andrew Morton dominates today's activity, tightening up DAMON monitoring, shrinker teardown races, and page tracking edge cases. A separate maintainers update brings Nick Desaulniers back into the fold.
Duration: PT2M10S
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: 2026-07-07T06:00:38Z
- Audio duration: PT2M10S
Transcript excerpt
This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.
Good day, and welcome to Linux Kernel Daily for July 7th, 2026.
Today's story is consolidation. One merge commit from Linus Torvalds folds in twenty memory management hotfixes, and the pattern across them is defensive coding against edge cases that only show up under stress or at scale.
Start with reliability. Commit zero-e-three-five-b-nine-b brings in fixes for two shrinker bugs: one causing a null pointer dereference in debugfs, another fixing a teardown race with shrinker info expansion. Races and null pointers in memory reclaim code are exactly the kind of bug that stays dormant for months and…
Second theme: DAMON, the kernel's data access monitoring system, got real attention. SJ contributed fixes for handling extreme intervals in the hot score calculation and cleaning up directory-put ordering bugs in the sysfs scheme code. Two separate DAMON kernel-doc comments were also added for context fields. This…
Third, smaller but worth knowing: proc's KPF_KSM flag was incorrectly reported for all anonymous pages, now fixed, and file ownership checks now use the correct mount idmap -- a correctness fix relevant to anyone relying on idmapped mounts for permission checks. Tooling also…
On…