IWMMXRA – Exit For Adjusting Resources

IWMMXRA invokes the resource adjustment exit. This exit makes the adjustments indicated for the buffer pool or other resources which may be responsible for delays to work requests. The return or reason codes for IWMMXRA are those set by the exit invoked.

The exit environment is described in the following. The parameter list is in pageable storage addressable in the current address space, but is not guaranteed to be in the key of the exit because it is not expected to be changed by the exit. Upon entry to the exit, the register contents are as follows:

• Register 0 = not defined
• Register 1 contains the address of a parameter list as formatted by the list form of this macro, IWMMXRA MF=(L).
• Registers 2-13 = not defined
• Register 14 = return address
• Register 15 = entry-point address

Upon entry to the exit, the access register contents are undefined.

Upon return from the exit, the register contents are as follows:

• Register 0 = Reason code if GR15 return code is non-zero
• Registers 1-14 = not defined (need not be restored to value on entry)
• Register 15 = Return code

Upon return from the exit, the access register contents are unchanged.