On powerpc64 calling a function needs 64 bytes of stack overhead

per recursion.  On amd64 it is only 32.  Allocate more stack per
thread and the stack tests pass everywhere

diff --git a/regress/sys/kern/fork-exit/fork-exit.c b/regress/sys/kern/fork-exit/fork-exit.c
index 6295b00..737e37e 100644 (file)
--- a/regress/sys/kern/fork-exit/fork-exit.c
+++ b/regress/sys/kern/fork-exit/fork-exit.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: fork-exit.c,v 1.5 2021/05/21 20:42:21 bluhm Exp $     */
+/*     $OpenBSD: fork-exit.c,v 1.6 2021/05/22 15:49:36 bluhm Exp $     */
 
 /*
  * Copyright (c) 2021 Alexander Bluhm <bluhm@openbsd.org>
@@ -123,7 +123,7 @@ create_threads(void)
        if (stack) {
                /* thread start and function call overhead needs a bit more */
                error = pthread_attr_setstacksize(&tattr,
-                   (stack + 2) * (4096 + 32));
+                   (stack + 2) * (4096 + 64));
                if (error)
                        errc(1, error, "pthread_attr_setstacksize");
        }
@@ -236,7 +236,7 @@ main(int argc, char *argv[])
                        break;
                case 's':
                        stack = strtonum(optarg, 0,
-                           (INT_MAX / (4096 + 32)) - 2, &errstr);
+                           (INT_MAX / (4096 + 64)) - 2, &errstr);
                        if (errstr != NULL)
                                errx(1, "number of stack allocations is %s: %s",
                                    errstr, optarg);