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https://lwn.net/Articles/810076/ process_madvise(), pidfd capabilities, and the revenge of the PIDs [LWN.net] Once upon a time, there were few ways for one process to operate upon another after its creatio [...] process madvisepidfdcapabilitiesrevengepids https://man7.org/linux/man-pages/man2/process_madvise.2.html process_madvise(2) - Linux manual page 2 linux manualprocess madvise https://lwn.net/Articles/811405/ process_madvise(), pidfd capabilities, and the revenge of the PIDs [LWN.net] process madvisepidfdcapabilitiesrevengepids