   Linux      5.
      -
     64- .    -
       ,   ,  
32-  ,    .  -
  Linux        -
 ,      
(,        
   ).     
"  ".       -
           -
    .

        -
 (page global directory, PGD).  PGD    
 pgd_t.      pgd_t  
unsigned long.    PGD      -
  , PMD.

        
 (page middle directory, PMD).   PMD   
 pmd_t.   PMD     (page table entry, 
 ).

         -
   pte_t.       .

        
  (   ).   
         -
  .        , 
    .  . 14.1  
,          -
 .

PGD         PMD         

pgdt
pgdt
pgdt
pgdt
pgdt
pgdt
pgdt
pgdt
pgdt

pmdt
pmdt
pmdt
pmdt
/ pmdt 
pmdt
pmdt
pmdt
pmdt

ptet
ptet
ptet
ptet
ptet
ptet
\ ptet
ptet
ptet

Puc. 14.1.  

    2.6.11     Linux  64-  
 4-,          -
.  32-    3 ,   .  . .

328  14