Green shading in the line number column means the source is part of the translation unit, red means it is conditionally excluded. Highlighted line numbers link to the translation unit page. Highlighted macros link to the macro page.
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 46: