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