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[$] User-space spinlocks with help from rseq()
vendredi 22 septembre 2023, 14:39 , par LWN.net
Back in May, André Almeida presented some
work toward the creation of user-space spinlocks using adaptive spinning. At that time, the work was stalled because there is, in Linux, currently no way to quickly determine whether a given thread is actually executing on a CPU. Some progress has since been made on that front; at the 2023 Open Source Summit Europe, Almeida returned to discuss how that difficulty might be overcome.
https://lwn.net/Articles/944895/
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