[BACK]Return to vm_map.c CVS log [TXT] [DIR] Up to [DragonFly] / src / sys / vm

Diff for /src/sys/vm/vm_map.c between versions 1.22 and 1.23

version 1.22, 2004/03/01 06:33:24 version 1.23, 2004/03/12 23:09:37
Line 2632  vmspace_fork(struct vmspace *vm1) Line 2632  vmspace_fork(struct vmspace *vm1)
         vm_map_lock(old_map);          vm_map_lock(old_map);
         old_map->infork = 1;          old_map->infork = 1;
   
           /*
            * XXX Note: upcalls are not copied.
            */
         vm2 = vmspace_alloc(old_map->min_offset, old_map->max_offset);          vm2 = vmspace_alloc(old_map->min_offset, old_map->max_offset);
         bcopy(&vm1->vm_startcopy, &vm2->vm_startcopy,          bcopy(&vm1->vm_startcopy, &vm2->vm_startcopy,
             (caddr_t) (vm1 + 1) - (caddr_t) &vm1->vm_startcopy);              (caddr_t)&vm1->vm_endcopy - (caddr_t)&vm1->vm_startcopy);
         new_map = &vm2->vm_map; /* XXX */          new_map = &vm2->vm_map; /* XXX */
         new_map->timestamp = 1;          new_map->timestamp = 1;
   
Line 2990  vmspace_exec(struct proc *p, struct vmsp Line 2993  vmspace_exec(struct proc *p, struct vmsp
   
         /*          /*
          * If we are execing a resident vmspace we fork it, otherwise           * If we are execing a resident vmspace we fork it, otherwise
          * we create a new vmspace.           * we create a new vmspace.  Note that exitingcnt and upcalls
            * are not copied to the new vmspace.
          */           */
         if (vmcopy)  {          if (vmcopy)  {
             newvmspace = vmspace_fork(vmcopy);              newvmspace = vmspace_fork(vmcopy);
         } else {          } else {
             newvmspace = vmspace_alloc(map->min_offset, map->max_offset);              newvmspace = vmspace_alloc(map->min_offset, map->max_offset);
             bcopy(&oldvmspace->vm_startcopy, &newvmspace->vm_startcopy,              bcopy(&oldvmspace->vm_startcopy, &newvmspace->vm_startcopy,
                 (caddr_t)(newvmspace+1) - (caddr_t) &newvmspace->vm_startcopy);                  (caddr_t)&oldvmspace->vm_endcopy - 
                       (caddr_t)&oldvmspace->vm_startcopy);
         }          }
   
         /*          /*
Line 3017  vmspace_exec(struct proc *p, struct vmsp Line 3022  vmspace_exec(struct proc *p, struct vmsp
 /*  /*
  * Unshare the specified VM space for forcing COW.  This   * Unshare the specified VM space for forcing COW.  This
  * is called by rfork, for the (RFMEM|RFPROC) == 0 case.   * is called by rfork, for the (RFMEM|RFPROC) == 0 case.
    *
    * The exitingcnt test is not strictly necessary but has been
    * included for code sanity (to make the code a bit more deterministic).
  */   */
   
 void  void
Line 3025  vmspace_unshare(struct proc *p) Line 3033  vmspace_unshare(struct proc *p)
         struct vmspace *oldvmspace = p->p_vmspace;          struct vmspace *oldvmspace = p->p_vmspace;
         struct vmspace *newvmspace;          struct vmspace *newvmspace;
   
         if (oldvmspace->vm_refcnt == 1)          if (oldvmspace->vm_refcnt == 1 && oldvmspace->vm_exitingcnt == 0)
                 return;                  return;
         newvmspace = vmspace_fork(oldvmspace);          newvmspace = vmspace_fork(oldvmspace);
         p->p_vmspace = newvmspace;          p->p_vmspace = newvmspace;
Removed from v.1.22  
changed lines
  Added in v.1.23