Blocking System Calls

Some articles on blocking system calls, system call:

Thread (computing) - Processes, Kernel Threads, User Threads, and Fibers - Thread and Fiber Issues - I/O and Scheduling
... However, the use of blocking system calls in user threads (as opposed to kernel threads) or fibers can be problematic ... If a user thread or a fiber performs a system call that blocks, the other user threads and fibers in the process are unable to run until the system call returns ... When an I/O operation is initiated, a system call is made, and does not return until the I/O operation has been completed ...

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