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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.
Dr Mel Gorman in Longford has written to the Leitrim Observer to extend his congratulations to Carrick-on-Shannon native, Dr Paul Armstrong on completing his ye.
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.