]>
Commit | Line | Data |
---|---|---|
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 |