Here is a portion of the proc struct. The process table managed by the kernel tasks is also called proc.

It is an array of these proc structs of size NR_TASKS + NR_PROCS.

#include <minix/com.h>
#include "protect.h"
#include "const.h"
#include "priv.h"
 
struct proc {
  struct stackframe_s p_reg;    /* process' registers saved in stack frame */

  reg_t p_ldt_sel;              /* selector in gdt with ldt base and limit */
  struct segdesc_s p_ldt[2+NR_REMOTE_SEGS]; /* CS, DS and remote segments */

  proc_nr_t p_nr;               /* number of this process (for fast access) */
  struct priv *p_priv;          /* system privileges structure */
  short p_rts_flags;            /* process is runnable only if zero */
  short p_misc_flags;           /* flags that do suspend the process */

  char p_priority;              /* current scheduling priority */
  char p_max_priority;          /* maximum scheduling priority */
  char p_ticks_left;            /* number of scheduling ticks left */
  char p_quantum_size;          /* quantum size in ticks */

  struct mem_map p_memmap[NR_LOCAL_SEGS];   /* memory map (T, D, S) */

  clock_t p_user_time;          /* user time in ticks */
  clock_t p_sys_time;           /* sys time in ticks */

  struct proc *p_nextready;     /* pointer to next ready process */
  struct proc *p_caller_q;      /* head of list of procs wishing to send */
  struct proc *p_q_link;        /* link to next proc wishing to send */
  message *p_messbuf;           /* pointer to passed message buffer */
  int p_getfrom_e;              /* from whom does process want to receive? */
  int p_sendto_e;               /* to whom does process want to send? */

  sigset_t p_pending;           /* bit map for pending kernel signals */

  char p_name[P_NAME_LEN];      /* name of the process, including \0 */

  int p_endpoint;               /* endpoint number, generation-aware */
};