On Saturday, 21 May 2022 19:31:59 BST Glorious Hellosway via devel wrote: > For `slab_nomerge`, it can lead to very slight increase of kernel memory. > `init_on_alloc=1` has a almost no performance impact, it is under 1% and is > usually within standard error, but there is bug with zfs that can make zfs > slower. `init_on_free=1` can be measured and is around 7-20% under certain > workloads, but in some workloads it does not impact performance. > `randomize_kstack_offset=on` can sometimes increase performance by 1%, or > decrease it by 1%, but Redis has been noticed to have performance reduced > by 2%. `pti=on` mitigates meltdown, but has a very big performance impact. That doesn't answer my core question: why aren't these the defaults in the upstream kernel, with the command line options there for turning them off if they impact you? -- Simon Farnsworth _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-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/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
