PAGEFIX parameter: Difference between revisions

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<tr><th align="right"><var>X'00000010'</var></th><td>Buffer hash field.</td></tr>
<tr><th align="right"><var>X'00000010'</var></th><td>Buffer hash field.</td></tr>
<tr><th align="right"><var>X'00000008'</var></th><td>STAT areas.</td></tr>
<tr><th align="right"><var>X'00000008'</var></th><td>STAT areas.</td></tr>
<tr><th align="right"><var>X'00000004'</var></th><td> SVIO work areas.</td></tr>
<tr><th align="right"><var>X'00000004'</var></th><td> SVIO work areas and Server swap pages.</td></tr>
<tr><th align="right"><var>X'00000002'</var></th><td>CWAIT work areas.</td></tr>
<tr><th align="right"><var>X'00000002'</var></th><td>CWAIT work areas.</td></tr>
<tr><th align="right"><var>X'00000001'</var></th><td>KOMM.  </td></tr>
<tr><th align="right"><var>X'00000001'</var></th><td>KOMM.  </td></tr>

Revision as of 21:09, 25 November 2014

Page-fix parameter string

Summary

Default value
X'00000000'
Parameter type
System
Where set
On User 0's parameter line
Related products
All
Introduced
Model 204 V6.1 or earlier

Description

The page fixing feature, indicative of which areas are to be fixed

PAGEFIX is not used under z/VM. It is used only under z/OS and z/VSE.

Valid settings of PAGEFIX are (options can be summed):

SettingFixes...
X'00080000'Online monitor subtask work area.
X'00040000'Record descriptions.
X'00020000'Server areas.
X'00010000'Record enqueuing table.
X'00008000'Resource enqueuing table.
X'00004000'User/file mode table.
X'00002000'File save areas.
X'00001000'DCB areas.
X'00000800'LPM and DSL for CCATEMP.
X'00000400'LPM and DSL for user files.
X'00000200'Physical extent blocks for CCATEMP.
X'00000100'Physical extent blocks for user files.
X'00000080'Journal control blocks and buffers.
X'00000040'Buffers.
X'00000020'Buffer control blocks.
X'00000010'Buffer hash field.
X'00000008'STAT areas.
X'00000004' SVIO work areas and Server swap pages.
X'00000002'CWAIT work areas.
X'00000001'KOMM.

PC TIMER requires KOMM to be pagefixed

Since the PC TIMER disables interrupts, but still needs to reference KOMM, the following error message informs you to pagefix KOMM. This prevents possible 0C4 and X'11' return codes or Page Translations Exceptions as they are commonly known.

M204.2447: KOMM MUST BE PAGE FIXED TO USE PCTIMER