FSDBK | Back to Index page

| Prolog Control Block Contents FSDBK 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.

FSDBK Prolog | Top of page

     NAME       : HCPFSDBK
     DESCRIPTION: Free Storage Data Block
     DSECT      : FSDBK
     FUNCTION   : Maps the fixed free storage data area, includes
                  the VMDBK formal spin lock.
     CREATED BY : not 'created'. Maps the entry point
                  HCPRSMFL defined in the RSM data module.
     DELETED BY : Never deleted
     RELOCATION CONSIDERATIONS : None

FSDBK Control Block Content | Top of page

     FSDBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      FSDBK          Free Storage Data Block
                 Free Storage Formal Spin Lock Data Area
          FSDVMLK covers  - Sysperm Free Storage List (HCPRSMSV/SB)
                          - VMDBK free storage
                          - Guestperm free storage List (HCPRSMFR/FB)
                          - VMDBK count of DWs in use (VMDVMDWU)
                          - Counts related to sysperm/guestperm
                            free storage (e.g. RSAFVMUD/RSAFVMUB,
                            RSAVMXUD/RSAVMXUB, RSASYSUD/RSASYSUB,
                            etc.)
    0000    0 Dbl-Word     8 FSDVMLK (6)    Free Storage Formal Spin Lock

FSDBK Storage Layout | Top of page

    *** FSDBK - Free Storage Data Block
    *
    *     +-------------------------------------------------------+
    *   0 |                                                       |
    *     =                       FSDVMLK                         =
    *     |                                                       |
    *     +-------------------------------------------------------+
    *  30
    *
    *** FSDBK - Free Storage Data Block

FSDBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    FSDVMLK        0000

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:28:21 EDT.
Copyright IBM Corporation, 1990, 2020