The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=39cddbd7a07c182c4f121bea5a6effa36862fc63
commit 39cddbd7a07c182c4f121bea5a6effa36862fc63 Author: Konstantin Belousov <[email protected]> AuthorDate: 2023-10-10 00:02:06 +0000 Commit: Konstantin Belousov <[email protected]> CommitDate: 2023-10-13 09:26:45 +0000 arm64: do not disable the kern.kstack_pages tunable on arm64 Add a comment explaining what is not quite correct with arm64 and riscv. Reviewed by: jhb, markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D42143 --- sys/kern/subr_param.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/sys/kern/subr_param.c b/sys/kern/subr_param.c index f7d6cf848424..b7dbf606f492 100644 --- a/sys/kern/subr_param.c +++ b/sys/kern/subr_param.c @@ -170,9 +170,13 @@ init_param1(void) { TSENTER(); -#if !defined(__arm64__) + + /* + * arm64 and riscv currently hard-code the thread0 kstack size + * to KSTACK_PAGES, ignoring the tunable. + */ TUNABLE_INT_FETCH("kern.kstack_pages", &kstack_pages); -#endif + hz = -1; TUNABLE_INT_FETCH("kern.hz", &hz); if (hz == -1)
