From: Waiman Long on gitlab.com https://gitlab.com/cki-project/kernel-ark/-/merge_requests/560#note_518417305 Using qspinlock is certainly a performance win for large systems with many cpus. Even on 1-socket system, the performance should be comparable with the current TAS spinlock. I will not suggest explicitly disabling it. Switching between TAS spinlock and qspinlock does break kABI (at least for the paravirtual version). If not, I would have backported it to RHEL8. Cheers, Longman _______________________________________________ kernel mailing list -- kernel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to kernel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/kernel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
