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Another push for sched_ext [LWN.net]

Another push for sched_ext [LWN.net]
lwn.net - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from lwn.net Daily Mail and Mail on Sunday newspapers.

Jonathan Corbet , Peter Zijlstra , Mel Gorman , Tejun Heo , Changwoo Min , Linux Storage ,

A framework for code tagging [LWN.net]

Kernel code can, at times, be quite inward looking; it often refers to
itself. To enable this introspection, the kernel has evolved several
mechanisms for identifying specific locations in the code and carrying out
actions related to those locations. The code-tagging
framework patch set, posted by Suren Baghdasaryan and Kent Overstreet,
is an attempt to replace various ad hoc implementations with a
single framework, and to add some new applications as well.
....

El Salvador , Kent Overstreet , Suren Baghdasaryan , Mel Gorman , Peter Zijlstra , Jonathan Corbet , Michal Hocko , Oscar Salvador ,

Solutions for direct-map fragmentation [LWN.net]

The kernel s "direct map" makes the entirety of a system s physical memory
available in the kernel s virtual address space. Normally, huge pages are used for
this mapping, making it relatively efficient to access. Increasingly,
though, there is a need to carve some pages out of the direct map; this
splits up those huge pages and makes the system as a whole less efficient.
During a memory-management session at the
2022
Linux Storage, Filesystem, Memory-management and BPF Summit (LSFMM),
Mike Rapoport led a session on direct-map fragmentation and how it might be
avoided.
....

David Hildenbrand , Jonathan Corbet , Michal Hocko , Mel Gorman , Mike Rapoport ,