PAGEFIX parameter

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

PAGEFIX specifies 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'02000000'	RESPAGE area. (version 7.6 and higher)
X'01000000'	Server non-swappable (NSA) area. (version 7.6 and higher)
X'00800000'	Open page buffers. (version 7.6 and higher)
X'00400000'	APSYPAGE area. (version 7.6 and higher)
X'00200000'	Checkpoint asynchronous buffers. (version 7.5 and higher)
X'00100000'	DBIDs. (version 7.6 and higher)
X'00080000'	Monitor real 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 (DTF areas in VSE).
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.

Timer PC requires KOMM to be pagefixed

Since the Timer PC 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 (commonly known as Page Translation Exceptions):

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