| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_THREADS_H |
| 2 | #define _LINUX_THREADS_H |
| 3 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | |
| 5 | /* |
| 6 | * The default limit for the nr of threads is now in |
| 7 | * /proc/sys/kernel/threads-max. |
| 8 | */ |
| 9 | |
| 10 | /* |
| Rusty Russell | 278d1ed | 2008-12-30 09:05:12 +1030 | [diff] [blame] | 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. |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | */ |
| Rusty Russell | 278d1ed | 2008-12-30 09:05:12 +1030 | [diff] [blame] | 14 | #ifndef CONFIG_NR_CPUS |
| 15 | /* FIXME: This should be fixed in the arch's Kconfig */ |
| 16 | #define CONFIG_NR_CPUS 1 |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #endif |
| 18 | |
| Rusty Russell | 278d1ed | 2008-12-30 09:05:12 +1030 | [diff] [blame] | 19 | /* Places which use this should consider cpumask_var_t. */ |
| 20 | #define NR_CPUS CONFIG_NR_CPUS |
| 21 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | /* |
| Ingo Molnar | 0771dfe | 2006-03-27 01:16:22 -0800 | [diff] [blame] | 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.] |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | */ |
| 33 | #define PID_MAX_LIMIT (CONFIG_BASE_SMALL ? PAGE_SIZE * 8 : \ |
| 34 | (sizeof(long) > 4 ? 4 * 1024 * 1024 : PID_MAX_DEFAULT)) |
| 35 | |
| 36 | #endif |