.MV - Format Memory Virtual Page Structures (VPs)

Display memory Virtual Page Structures (VPs).

Syntax:

                     ┌─────────┐
                              │
────.MV ──┬───────┬─┬───────┬┴┬──────────────────────────┬─────
            └── B ──┘ ├── F ──┤ ├── vpid  ──┬─┬─────────┬──┘
                      ├── L ──┤ └── laddr ──┘ └── Ln ───┘
                      └── R ──┘

Parameters:

B

Display in-use (busy) Virtual Page Structures in sequential order.

Note: In-Use VPs are signified by a zero reference count and not by the The VP_BUSY flag. See Ref= field in .MV Output Field Description.

F
Display free Page Frame Structures.
L
Follow left (forward) chain pointer. This is only of relevance to Free Virtual Page Structures since these are linked in a double linked chain.

Warning: Both the Dump Formatter and the Kernel Debugger may fail to recognise the chain pointers correctly and under some circumstances the debug kernel may hang. Use this option advisedly! From fix pack 29 for Warp V3 and base Warp V4 this has been fixed.


See Free Virtual Page Structures for information on locating Free VP chains.

R
Follow right (backward) chain pointer. This is only of relevance to Free Virtual Page Structures since these are linked in a double linked chain.

Warning: Both the Dump Formatter and the Kernel Debugger may fail to recognise the chain pointers correctly and under some circumstances the debug kernel may hang. (.MVFL will cause this effect). Use this option advisedly! From fix pack 29 for Warp V3 and base Warp V4 this has been fixed.


See Free Virtual Page Structures for information on locating Free VP chains.

laddr
Specifies the linear address of a specific Virtual Page Structure to be formatted.

An address expression may be specified.

Ln
Specifies the number of Virtual Page Structures to display from the starting criterion.
vpid
Specifies a VP Id. This is an index in to the table of Virtual Page Structures, which are located in contiguous virtual storage.

Results & Notes:

Virtual Page Structures are allocated in contiguous storage from the address given by global variable:

_pgpVPBase

Output from the .MV. command appears in one of two formats.

In-use Virtual Page Structure
Free Virtual Page Structure.

For a description of the fields formatted by .MV select .MV Output Field Descriptions

For more examples using of the .M family of commands see: Exploring Memory Management.

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