Linux Kernel Daily: Cache Scheduling and Perf Sampling Fixes for 7.3-rc5
Late-cycle merges fix last-level cache mis-scheduling, use-after-free in cache statistics, and Intel precise sampling errors, alongside hardening for cpusets, workqueues, and x86. Linux 7.3-rc5 is now tagged.
Duration: PT2M14S
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: 2026-09-28T06:01:17Z
- Audio duration: PT2M14S
Transcript excerpt
This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.
Good morning, it's Monday, September 28th, 2026.
Our top story is late-cycle correctness: the biggest merges this week fix the scheduler placing tasks on the wrong cache domain, and performance tools misclassifying memory samples.
First, cache-aware scheduling. A scheduler urgent merge fixes two ways tasks could be mis-scheduled across last-level cache boundaries, including active load balancing ignoring migration rules and running counts tracked in the wrong domain. It also fixes use-after-free bugs in cache-grouping statistics by separating…
Second, performance monitoring. A perf urgent merge corrects Intel precise sampling, especially load-store direction and snoop states that determine how samples are classified on newer chips like Panther Cove, Lion Cove, Granite Rapids and others. It also tightens event scheduling constraints, renames two confusing…
Finally, isolation and crash hardening. Partitioned processor sets once again reject exclusive C P U claims that conflict with an ancestor, a workqueue fix avoids a null crash when a worker flushes during out-of-memory handling, x86 fixes protect debug registers across task migration after machine-check events and…
With seven point…
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