| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_THREADS_H |
| 2 | #define _LINUX_THREADS_H |
| 3 | |
| 4 | #include <linux/config.h> |
| 5 | |
| 6 | /* |
| 7 | * The default limit for the nr of threads is now in |
| 8 | * /proc/sys/kernel/threads-max. |
| 9 | */ |
| 10 | |
| 11 | /* |
| 12 | * Maximum supported processors that can run under SMP. This value is |
| 13 | * set via configure setting. The maximum is equal to the size of the |
| 14 | * bitmasks used on that platform, i.e. 32 or 64. Setting this smaller |
| 15 | * saves quite a bit of memory. |
| 16 | */ |
| 17 | #ifdef CONFIG_SMP |
| 18 | #define NR_CPUS CONFIG_NR_CPUS |
| 19 | #else |
| 20 | #define NR_CPUS 1 |
| 21 | #endif |
| 22 | |
| 23 | #define MIN_THREADS_LEFT_FOR_ROOT 4 |
| 24 | |
| 25 | /* |
| 26 | * This controls the default maximum pid allocated to a process |
| 27 | */ |
| 28 | #define PID_MAX_DEFAULT (CONFIG_BASE_SMALL ? 0x1000 : 0x8000) |
| 29 | |
| 30 | /* |
| Ingo Molnar | 0771dfe | 2006-03-27 01:16:22 -0800 | [diff] [blame] | 31 | * A maximum of 4 million PIDs should be enough for a while. |
| 32 | * [NOTE: PID/TIDs are limited to 2^29 ~= 500+ million, see futex.h.] |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | */ |
| 34 | #define PID_MAX_LIMIT (CONFIG_BASE_SMALL ? PAGE_SIZE * 8 : \ |
| 35 | (sizeof(long) > 4 ? 4 * 1024 * 1024 : PID_MAX_DEFAULT)) |
| 36 | |
| 37 | #endif |