Citation :
"once upon a time (prior to 2.6.16), semaphores were one of the primary mutual exclusion mechanisms in the kernel. The 2.6.16 cycle brought in mutexes from the realtime tree, and most semaphore users were converted over. So semaphores, which were once a performance-critical primitive, are now much less so".
[^] # Re: Sémaphore et mutex
Posté par patrick_g (site web personnel) . En réponse à la dépêche La fin du verrou global dans le noyau Linux ?. Évalué à 2.
Citation :
"once upon a time (prior to 2.6.16), semaphores were one of the primary mutual exclusion mechanisms in the kernel. The 2.6.16 cycle brought in mutexes from the realtime tree, and most semaphore users were converted over. So semaphores, which were once a performance-critical primitive, are now much less so".