include/sys/vmsystm.h

   1 #ifndef _SPL_VMSYSTM_H
   2 #define _SPL_VMSYSTM_H
   3
   4 #include <linux/mm.h>
   5 #include <sys/types.h>
   6
   7 extern vmem_t *zio_alloc_arena;         /* arena for zio caches */
   8
   9 #define physmem                         num_physpages
  10 #define ptob(pages)                     (pages * PAGE_SIZE)
  11 #define membar_producer()               smp_wmb()
  12
  13 #define copyin(from, to, size)          copy_from_user(to, from, size)
  14 #define copyout(from, to, size)         copy_to_user(to, from, size)
  15
  16 #if 0
  17 /* The approximate total number of free pages */
  18 #define freemem                         0
  19
  20 /* The average number of free pages over the last 5 seconds */
  21 #define avefree                         0
  22
  23 /* The average number of free pages over the last 30 seconds */
  24 #define avefree30                       0
  25
  26 /* A guess as to how much memory has been promised to
  27  * processes but not yet allocated */
  28 #define deficit                         0
  29
  30 /* A guess as to how many page are needed to satisfy
  31  * stalled page creation requests */
  32 #define needfree                        0
  33
  34 /* A bootlean the controls the setting of deficit */
  35 #define desperate
  36
  37 /* When free memory is above this limit, no paging or swapping is done */
  38 #define lotsfree                        0
  39
  40 /* When free memory is above this limit, swapping is not performed */
  41 #define desfree                         0
  42
  43 /* Threshold for many low memory tests, e.g. swapping is
  44  * more active below this limit */
  45 #define minfree                         0
  46 #endif
  47
  48 #endif /* SPL_VMSYSTM_H */