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/include/linux/threads.h

https://github.com/airy09/android_kernel_sony_apq8064
C Header | 45 lines | 13 code | 9 blank | 23 comment | 0 complexity | 198150a1feb6a72ba7fc7401d6864b01 MD5 | raw file
 1#ifndef _LINUX_THREADS_H
 2#define _LINUX_THREADS_H
 3
 4
 5/*
 6 * The default limit for the nr of threads is now in
 7 * /proc/sys/kernel/threads-max.
 8 */
 9
10/*
11 * Maximum supported processors.  Setting this smaller saves quite a
12 * bit of memory.  Use nr_cpu_ids instead of this except for static bitmaps.
13 */
14#ifndef CONFIG_NR_CPUS
15/* FIXME: This should be fixed in the arch's Kconfig */
16#define CONFIG_NR_CPUS	1
17#endif
18
19/* Places which use this should consider cpumask_var_t. */
20#define NR_CPUS		CONFIG_NR_CPUS
21
22#define MIN_THREADS_LEFT_FOR_ROOT 4
23
24/*
25 * This controls the default maximum pid allocated to a process
26 */
27#define PID_MAX_DEFAULT (CONFIG_BASE_SMALL ? 0x1000 : 0x8000)
28
29/*
30 * A maximum of 4 million PIDs should be enough for a while.
31 * [NOTE: PID/TIDs are limited to 2^29 ~= 500+ million, see futex.h.]
32 */
33#define PID_MAX_LIMIT (CONFIG_BASE_SMALL ? PAGE_SIZE * 8 : \
34	(sizeof(long) > 4 ? 4 * 1024 * 1024 : PID_MAX_DEFAULT))
35
36/*
37 * Define a minimum number of pids per cpu.  Heuristically based
38 * on original pid max of 32k for 32 cpus.  Also, increase the
39 * minimum settable value for pid_max on the running system based
40 * on similar defaults.  See kernel/pid.c:pidmap_init() for details.
41 */
42#define PIDS_PER_CPU_DEFAULT	1024
43#define PIDS_PER_CPU_MIN	8
44
45#endif