2 * Copyright (c) 2021 The FreeBSD Foundation
4 * This software were developed by Konstantin Belousov <kib@FreeBSD.org>
5 * under sponsorship from the FreeBSD Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/param.h>
30 #include <sys/sysctl.h>
36 sched_setaffinity(pid_t pid, size_t cpusetsz, const cpuset_t *cpuset)
43 sz = cpusetsz > sizeof(cpuset_t) ? sizeof(cpuset_t) : cpusetsz;
44 memset(&c, 0, sizeof(c));
45 memcpy(&c, cpuset, sz);
47 /* Linux ignores high bits */
49 len = sizeof(mp_maxid);
50 error = sysctlbyname("kern.smp.maxid", &mp_maxid, &len,
55 lbs = CPU_FLS(&c) - 1;
57 CPU_FOREACH_ISSET(cpu, &c)
61 error = cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID,
62 pid == 0 ? -1 : pid, sizeof(cpuset_t), &c);
63 if (error == -1 && errno == EDEADLK)