PAGEFIX parameter: Difference between revisions
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<p class="code">M204.2447: KOMM MUST BE PAGE FIXED TO USE PCTIMER | <p class="code">M204.2447: KOMM MUST BE PAGE FIXED TO USE PCTIMER | ||
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[[Category:System | [[Category:System Parameters]] | ||
[[Category:Parameters]] | [[Category:Parameters]] | ||
Revision as of 15:11, 19 April 2013
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):
| Setting | Fixes... |
|---|---|
| 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. |
| 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