SALBK Back to Index page
 
Prolog 
Control Block Contents 
   SALBK 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.


  SALBK Prolog Top of page
  
 NAME       : HCPSALBK
 DESCRIPTION: Slot Allocation Data Block
 DSECT      : SALBK
 FUNCTION   : Maps the data in the slot allocation data areas
              in HCPPGD for paging (HCPPGDPG) and spooling
              (HCPPGDSP).
 LOCATED BY : The data areas mapped by this block,
              HCPPGDPG (paging data) and HCPPGDSP (spooling
              data), are in nucleus-resident areas.
 CREATED BY : The data areas mapped by this block are created
              at system generation.
 DELETED BY : The data areas mapped by this block are
              never deleted.
 SERIALIZED : SALLOCK unless otherwise noted.
 RELOCATION CONSIDERATIONS : None
 COMMENTS   : None
 
 
  SALBK Control Block Content Top of page
  




 SALBK DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      SALBK          Slot Allocation Data Block
0000    0 Dbl-Word     8 SALLOCK (6)    Allocation lockword
0030   48 Bitstring   12 SALALPTR       Pointers to control blocks for
                                        volume from which slots are
                                        currently being allocated
003C   60 Signed       4 SALALCST       Work area: number of paging slots
                                        allocated on the current volume
                                        during one invocation of HCPPGV
0040   64 Signed       4 SALLIST        CPVOL ANCHOR
0044   68 Signed       4 *              Reserved for IBM use
0048   72 Signed       4 *              Reserved for IBM use
004C   76 Signed       4 *              Reserved for IBM use
0050   80 Signed       4 *              Reserved for IBM use
0054   84 Signed       4 SALDMPAV       Total dump slots available on
                                        special DUMP ONLY volume (used in
                                        spool SALBK only)
0058   88 Signed       4 SALDMPIU       Total dump slots in use on
                                        special DUMP ONLY volume (used in
                                        spool SALBK only)
005C   92 Signed       4 *              Reserved for IBM use
0060   96 Signed       4 *              Reserved for IBM use
0064  100 Signed       4 SAL90FUL       Number of times paging or
                                        spooling slots were 90% full.
0068  104 Address      4 SALOFFST       Offset to CPVOL chain for this
                                        allocation type in CPVLIST
006C  108 Bitstring    1 SALPARM        HCPPGT / HCPPGU parameter Allowed
                                        SALPARM values: PGTPAGE: paging
                                        SALBK PGTSPOOL: spooling SALBK
          00000001       PGTPAGE        X'01' PGTPAGE DASD slot required
                                        for paging Notes : PGTPAGE ==
                                        PGUPAGE == ALOCPAGE == CPVTEMPP
                                        (Enforced via CKMAINT in HCPALOC,
                                        HCPCPVOL)
          00000002       PGTSPOOL       X'02' PGTSPOOL DASD slot required
                                        for spooling Notes : PGTSPOOL ==
                                        PGUSPOOL == ALOCSPOL == CPVTEMPS
                                        (Enforced via CKMAINT in HCPALOC,
                                        HCPCPVOL)
          00000004       PGTALLOC       X'04' PGTALLOC Allocate slots in
                                        MSABK
          00000008       PGTREG         X'08' PGTREG Return ASA in a
                                        register
          00000010       PGTASA         X'10' PGTASA Input in form ASA,
                                        not EXTBK slot num
          00000020       PGTALTAS       X'20' PGTALTAS REQUEST APPLIES TO
                                        ALT ASCBK ASCBK address is passed
                                        to HCPPGT in R10
          00000040       PGTSYS         X'40' PGTSYS CALL APPLIES TO
                                        SYSTEM SPACE
          00000080       PGTNOUPD       X'80' PGTNOUPD ASCBK's ASCCTPGS
                                        count has alread been updated
          00000002       PGUSPOOL       X'02' PGUSPOOL DASD slot required
                                        for spooling Notes : PGUSPOOL ==
                                        PGTSPOOL == ALOCSPOL == CPVTEMPS
                                        (Enforced via CKMAINT in HCPALOC,
                                        HCPCPVOL)
          00000001       PGUPAGE        X'01' PGUPAGE DASD slot required
                                        for paging Notes : PGUPAGE ==
                                        PGTPAGE == ALOCPAGE == CPVTEMPP
                                        (Enforced via CKMAINT in HCPALOC,
                                        HCPCPVOL)
      Notes      :  PGTPAGE == PGUPAGE == ALOCPAGE == CPVTEMPP
             (enforced in HCPALOC, HCPCPVOL)
             PGTSPOOL == PGUSPOOL == ALOCSPOL == CPVTEMPS
             (enforced in HCPALOC, HCPCPVOL)
006D  109 Bitstring    1 *              Reserved for IBM use
006E  110 Signed       2 SALAVLEX       Number of devices that have slots
                                        available. Incremented: - At
                                        attach time. - when
                                        CPVLSTAT.CPVTEMPP is turned off:
                                        Slots become avail. - When START
                                        is issued. Decremented: - When
                                        DRAIN is issued. - when
                                        CPVLSTAT.CPVTEMPP is turned on:
                                        Volume is full. - AT detach time.
                                        Compare to SALMAXEX. Maintained
                                        for paging and spooling only.
                                        Serialized by the MLOAD lock.
0070  112 Signed       4 SALOTHER       Address of the other slot type.
0074  116 Signed       4 SALMAXPR       Theoretical maximum paging rate
                                        for the system, including all
                                        volumes currently attached (used
                                        for paging slots only)
0078  120 Signed       4 SALTOTML       Total MLOAD for this space type.
007C  124 Signed       4 SALAVGML       Average MLOAD for this space
                                        type.
0080  128 Bitstring    1 SALGDFRG       Size of useful fragment. Used
                                        when allocating part of CASBK to
                                        determine if the remainder of the
                                        fragment is large enough to
                                        bother keeping.
0081  129 Bitstring    1 SALCASMN       Minimum CASBK size for this
                                        allocation type (crumb size)
0082  130 Signed       2 SALMAXEX       Number of devices that have slots
                                        allocated in their allocation
                                        map. Incremented: - At attach
                                        time. - When START is issued.
                                        Decremented: - When DRAIN is
                                        issued. - AT detach time. Compare
                                        to SALAVLEX. Maintained for
                                        paging and spooling only.
                                        Serialized by the MLOAD lock.
0084  132 Signed       4 SALEXTPF       Percentage of slots that must be
                                        available in an EXTBK for it to
                                        be chosen as the current
                                        allocation volume.
0088  136 Dbl-Word     8 SALSLTAVg (0)  Total slots available - includes
                                        slots on DRAINing volumes
0088  136 Signed       4 SALSLTAVg_hi   SALSLTAVg high fw
008C  140 Signed       4 SALSLTAVg_lo   SALSLTAVg low fw
0090  144 Dbl-Word     8 SALSLTIUg (0)  Number of slots in use - includes
                                        slots on DRAINing volumes
0090  144 Signed       4 SALSLTIUg_hi   SALSLTIUg high fw
0094  148 Signed       4 SALSLTIUg_lo   SALSLTIUg low fw
0098  152 Dbl-Word     8 SALSLT9Ag (0)  Total slots available, as used
                                        for 90% full calculations - does
                                        not include slots on DRAINing
                                        volumes
0098  152 Signed       4 SALSLT9Ag_hi   SALSLT9Ag high fw
009C  156 Signed       4 SALSLT9Ag_lo   SALSLT9Ag low fw
00A0  160 Dbl-Word     8 SALSLT9Ig (0)  Number of slots in use, as used
                                        for 90% full calculations - does
                                        not include slots on DRAINing
                                        volumes
00A0  160 Signed       4 SALSLT9Ig_hi   SALSLT9Ig high fw
00A4  164 Signed       4 SALSLT9Ig_lo   SALSLT9Ig low fw
00A8  168 Dbl-Word     8 SALSLT90g      90% of slots available
00B0  176 Dbl-Word     8 SALFLG90g      90% full reset flag
00B8  184 Signed       4 * (24)         Reserved for IBM use.
0030   48 Signed       8 SALCPVX (0)    Current CPVOL/VEXBK addresses
0030   48 Signed       4 SALCPVOL       Pointer to CPVOL address for
                                        current allocation volume
0034   52 Signed       4 SALVEXBK       Pointer to VEXBK address for
                                        current allocation volume
0038   56 Signed       4 SALEXTBK       Pointer to EXTBK address for
                                        current allocation extent
          0000000C       SALAPLEN       *-SALCPVX Length of allocation
                                        pointers
 
 
  SALBK Storage Layout Top of page
  
          
*** SALBK - Slot Allocation Data Block
*
*     +-------------------------------------------------------+
*   0 |                                                       |
*     =                       SALLOCK                         =
*     |                                                       |
*     +-------------------------------------------------------+
*  30 |                       SALALPTR                        |
*     |                           +---------------------------+
*  38 |                           |         SALALCST          |
*     +---------------------------+---------------------------+
*  40 |         SALLIST           |///////////////////////////|
*     +---------------------------+---------------------------+
*  48 |///////////////////////////|///////////////////////////|
*     +---------------------------+---------------------------+
*  50 |///////////////////////////|         SALDMPAV          |
*     +---------------------------+---------------------------+
*  58 |         SALDMPIU          |///////////////////////////|
*     +---------------------------+---------------------------+
*  60 |///////////////////////////|         SAL90FUL          |
*     +---------------------------+------+------+-------------+
*  68 |         SALOFFST          |:PARM |//////|  SALAVLEX   |
*     +---------------------------+------+------+-------------+
*  70 |         SALOTHER          |         SALMAXPR          |
*     +---------------------------+---------------------------+
*  78 |         SALTOTML          |         SALAVGML          |
*     +------+------+-------------+---------------------------+
*  80 |:GDFRG|:CASMN|  SALMAXEX   |         SALEXTPF          |
*     +------+------+-------------+---------------------------+
*  88 |       SALSLTAVG_HI        |       SALSLTAVG_LO        |
*     +---------------------------+---------------------------+
*  90 |       SALSLTIUG_HI        |       SALSLTIUG_LO        |
*     +---------------------------+---------------------------+
*  98 |       SALSLT9AG_HI        |       SALSLT9AG_LO        |
*     +---------------------------+---------------------------+
*  A0 |       SALSLT9IG_HI        |       SALSLT9IG_LO        |
*     +---------------------------+---------------------------+
*  A8 |                      SALSLT90G                        |
*     +-------------------------------------------------------+
*  B0 |                      SALFLG90G                        |
*     +-------------------------------------------------------+
*  B8 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
* 118
*
*** SALBK - Slot Allocation Data Block
          
*** Overlay for SALALPTR in SALBK
*
*     +---------------------------+---------------------------+
*  30 |         SALCPVOL          |         SALVEXBK          |
*     +---------------------------+---------------------------+
*  38 |         SALEXTBK          | 3C
*     +---------------------------+
*
*** Overlay for SALALPTR in SALBK
 
 
  SALBK Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
PGTALLOC       006C 00000004
PGTALTAS       006C 00000020
PGTASA         006C 00000010
PGTNOUPD       006C 00000080
PGTPAGE        006C 00000001
PGTREG         006C 00000008
PGTSPOOL       006C 00000002
PGTSYS         006C 00000040
PGUPAGE        006C 00000001
PGUSPOOL       006C 00000002
SALALCST       003C
SALALPTR       0030
SALAPLEN       0038 0000000C
SALAVGML       007C
SALAVLEX       006E
SALCASMN       0081
SALCPVOL       0030
SALCPVX        0030
SALDMPAV       0054
SALDMPIU       0058
SALEXTBK       0038
SALEXTPF       0084
SALFLG90g      00B0
SALGDFRG       0080
SALLIST        0040
SALLOCK        0000
SALMAXEX       0082
SALMAXPR       0074
SALOFFST       0068
SALOTHER       0070
SALPARM        006C
SALSLTAVg      0088
SALSLTAVg_hi   0088
SALSLTAVg_lo   008C
SALSLTIUg      0090
SALSLTIUg_hi   0090
SALSLTIUg_lo   0094
SALSLT9Ag      0098
SALSLT9Ag_hi   0098
SALSLT9Ag_lo   009C
SALSLT9Ig      00A0
SALSLT9Ig_hi   00A0
SALSLT9Ig_lo   00A4
SALSLT90g      00A8
SALTOTML       0078
SALVEXBK       0034
SAL90FUL       0064
 
This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:30:12 EDT.
Copyright IBM Corporation, 1990, 2020