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[$] Descriptorless files for io_uring
Monday July 19, 2021. 05:59 PM , from LWN.net
The lowly file descriptor is one of the fundamental objects in Linux
systems. A file descriptor, which is a simple integer value, can refer to an open file — or to a network connection, a running process, a loaded BPF program, or a namespace. Over the years, the use of file descriptors to refer to transient objects has grown to the point that it can be difficult to justify an API that uses anything else. Interestingly, though, the io_uring subsystem looks as if it is moving toward its own number space separate from file descriptors.
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