xv6

port of xv6 to x86-64
git clone http://frotz.net/git/xv6.git
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param.h (614B)


      1 #define NPROC        64  // maximum number of processes
      2 #define KSTACKSIZE 4096  // size of per-process kernel stack
      3 #define NCPU          8  // maximum number of CPUs
      4 #define NOFILE       16  // open files per process
      5 #define NFILE       100  // open files per system
      6 #define NBUF         10  // size of disk block cache
      7 #define NINODE       50  // maximum number of active i-nodes
      8 #define NDEV         10  // maximum major device number
      9 #define ROOTDEV       1  // device number of file system root disk
     10 #define MAXARG       32  // max exec arguments
     11 #define LOGSIZE      10  // max data sectors in on-disk log
     12