LXR linux-bk/include/linux/threads.h

   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 0x8000
  29
  30/*
  31 * A maximum of 4 million PIDs should be enough for a while:
  32 */
  33#define PID_MAX_LIMIT (sizeof(long) > 4 ? 4*1024*1024 : PID_MAX_DEFAULT)
  34
  35#endif
  36