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https://www.oreilly.com/library/view/understanding-the-linux/0596005652/ch01s01.html
Multiprocessor support Several Unix kernel variants take advantage of multiprocessor systems. Linux 2.6 supports symmetric multiprocessing (SMP ) for different memory models, including NUMA: the system can use multiple processors and each processor can handle any task — there is no discrimination among them.
https://help.ubuntu.com/lts/installation-guide/powerpc/ch02s01.html
Multiprocessor support — also called “ symmetric multiprocessing ” or SMP — is available for this architecture, and is supported by a precompiled Ubuntu kernel image. Depending on your install media, this SMP-capable kernel may or may not be installed by default.
https://www.mimuw.edu.pl/~vincent/lecture10/10-multiprocessors.pdf
Linux kernel history of multiprocessor support 2.0 (June 1996) - SMP support using big kernel lock (BKL) for getting into kernel (only one processor could enter kernel) – 16 CPUs supported 2.2 (January 1999) – introduced fine-grained locking (spinlocks), removed big kernel lock in some places 2.4.0 (January 2001) – more fine-grained
https://linux-kernel-labs.github.io/master/lectures/smp.html
Because the Linux kernel supports symmetric multi-processing (SMP) it must use a set of synchronization mechanisms to achieve predictable results, free of race conditions.
The Linux kernel is modified to support the sporadic task model, modular scheduler plugins, and reservation-based scheduling. Clustered, partitioned, and global schedulers are included, and semi-partitioned scheduling is supported as well.
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