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Rev | Author | Line No. | Line |
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5270 | serge | 1 | #ifndef _LINUX_THREADS_H |
2 | #define _LINUX_THREADS_H |
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3 | |||
4 | |||
5 | /* |
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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 | |||
10 | /* |
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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 | /* FIXME: This should be fixed in the arch's Kconfig */ |
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16 | #define CONFIG_NR_CPUS 1 |
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17 | #endif |
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18 | |||
19 | /* Places which use this should consider cpumask_var_t. */ |
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20 | #define NR_CPUS CONFIG_NR_CPUS |
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21 | |||
22 | #define MIN_THREADS_LEFT_FOR_ROOT 4 |
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23 | |||
24 | /* |
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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 | |||
29 | /* |
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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 | |||
36 | /* |
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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 | |||
45 | #endif |