linux/include/linux/threads.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_THREADS_H
#define _LINUX_THREADS_H


/*
 * The default limit for the nr of threads is now in
 * /proc/sys/kernel/threads-max.
 */

/*
 * Maximum supported processors.  Setting this smaller saves quite a
 * bit of memory.  Use nr_cpu_ids instead of this except for static bitmaps.
 */
#ifndef CONFIG_NR_CPUS
/* FIXME: This should be fixed in the arch's Kconfig */
#define CONFIG_NR_CPUS …
#endif

/* Places which use this should consider cpumask_var_t. */
#define NR_CPUS …

#define MIN_THREADS_LEFT_FOR_ROOT …

/*
 * This controls the default maximum pid allocated to a process
 */
#define PID_MAX_DEFAULT …

/*
 * A maximum of 4 million PIDs should be enough for a while.
 * [NOTE: PID/TIDs are limited to 2^30 ~= 1 billion, see FUTEX_TID_MASK.]
 */
#define PID_MAX_LIMIT …

/*
 * Define a minimum number of pids per cpu.  Heuristically based
 * on original pid max of 32k for 32 cpus.  Also, increase the
 * minimum settable value for pid_max on the running system based
 * on similar defaults.  See kernel/pid.c:pid_idr_init() for details.
 */
#define PIDS_PER_CPU_DEFAULT …
#define PIDS_PER_CPU_MIN …

#endif