From: David Hildenbrand <david@xxxxxxxxxx> mm/cma: mark CMA on x86_64 tech preview and print RHEL-specific infos Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1945002 Upstream: RHEL only CMA is Tech Preview in RHEL 9 for x86_64; to detect the use of CMA easily, taint the kernel via mark_tech_preview(). Further print an info when cma_alloc() is getting called for the first time. Keep s390x (for vmcp) and ppc64 (for KVM) unmodified, as they have been automatically creating CMA regions already in RHEL 8. Signed-off-by: David Hildenbrand <david@xxxxxxxxxx> diff a/mm/cma.c b/mm/cma.c --- a/mm/cma.c +++ b/mm/cma.c @@ -125,6 +125,12 @@ static void __init cma_activate_area(struct cma *cma) spin_lock_init(&cma->mem_head_lock); #endif +#ifdef CONFIG_RHEL_DIFFERENCES + /* s390x and ppc64 has been using CMA already in RHEL 8 as default. */ + if (!IS_ENABLED(CONFIG_S390) && !IS_ENABLED(CONFIG_PPC64)) + mark_tech_preview("CMA", NULL); +#endif /* CONFIG_RHEL_DIFFERENCES */ + return; not_in_zone: @@ -437,6 +443,10 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, if (!cma || !cma->count || !cma->bitmap) return NULL; +#ifdef CONFIG_RHEL_DIFFERENCES + pr_info_once("%s() got called for the first time\n", __func__); +#endif /* CONFIG_RHEL_DIFFERENCES */ + pr_debug("%s(cma %p, count %zu, align %d)\n", __func__, (void *)cma, count, align); -- https://gitlab.com/cki-project/kernel-ark/-/merge_requests/1023 _______________________________________________ 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
