MSABK Back to Index page
 
Prolog 
Control Block Contents 
   MSABK DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  MSABK Prolog Top of page
 
 NAME       : HCPMSABK
 DESCRIPTION: Map of Slot Allocation
 DSECT      : MSABK
 FUNCTION   : Slot bit map for page or spool EXTBK
 LOCATED BY : EXTSTRCT
 CREATED BY : - HCPPGU when extent is selected for
              allocation.
              - HCPPGT when reallocating spool slots
              during IPL.
              - HCPPGC when extent selected to use as
              Dump space.
 DELETED BY : HCPRDD when a CP-owned device is detached
              from the system.
 REFERENCES :
              HCPEXTBK - Extent block
 SERIALIZED : Page or Spool allocation lock
 RELOCATION CONSIDERATIONS : None
 NOTES      : MSABK represents a maximum of 8000 slots.
 
 
  MSABK Control Block Content Top of page
 

 MSABK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure MSABK Map of Slot Allocation 0000 0 Bitstring 1000 MSASLOTS Slot bit map...Each bit represents a slot in the EXTBK. If bit = 1, slot is in use. If bit = 0, slot is not in use. 0000007D MSASIZE (*-MSABK+7)/8 00001F40 MSAMAXSL 8000 Max number of slots per MSABK * end ASM version
 
 
  MSABK Storage Layout Top of page
 
          
*** MSABK - Map of Slot Allocation
*
*     +-------------------------------------------------------+
*   0 |                                                       |
*     =                       MSASLOTS                        =
*     |                                                       |
*     +-------------------------------------------------------+
* 3E8
*
*** MSABK - Map of Slot Allocation
 
 
  MSABK Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
MSAMAXSL       0000 00001F40
MSASIZE        0000 0000007D
MSASLOTS       0000
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:52:49 EDT.
Copyright IBM Corporation, 1990, 2022