TECHNICAL INFORMATION DOCUMENT

TITLE:  PTF288 - Fix for memory deadlock in procfs
DATE:  16OCT95
README FOR:  PTF288
PRODUCT and VERSION:

UnixWare 1.1


Installation Instructions:  

DATATYPE: datastream

1.  Download the ptf288.Z and ptf288.txt files to the /tmp directory  
    on your machine.

2.  Read the release notes contained in this file and follow the 
    instuctions to add the package to your system.

3.  Now become root, uncompress the file and add the package to your 
    system using the following commands:

        $ su
        # uncompress /tmp/ptf288.Z
        # pkgadd -d /tmp/ptf288

ENGINEERING RELEASE NOTES
-------------------------

Title
-----

PTF288 - Fix for memory deadlock in procfs

Product And Version
--------------------

UnixWare 1.1.3 and 1.1.4

Abstract
--------

This PTF fixes a problem in the procfs module that can cause a memory
deadlock.

Symptom
--------

The UnixWare 1.1.3 or 1.1.4 system stops responding to all requests.
That is, the system "hangs."

SOLUTION SPECIFICS
------------------

General Description.
-------------------

A logic error in the procfs module in UnixWare 1.1.3 and 1.1.4 causes the
system to hang.  This PTF fixes that error.

This problem will occur only on computers with CPUs that support Page
Size Extension, such as Intel's Pentium CPU and some late-model i486
CPUs.

New Features.
------------

None.

Software Notes and Recommendations.
----------------------------------

This PTF can be installed on UnixWare 1.1.3 or UnixWare 1.1.4.  If you
install this PTF and later install (or reinstall) UnixWare 1.1.3 or
UnixWare 1.1.4, you will need to reinstall this PTF.

Testing of the modified software contained in this package has
been conducted only to the extent necessary to confirm that it
resolves the problem(s) stated above ("Symptom").  Such testing
consists of recreating the problem conditions and verifying that 
the problem no longer occurs.  No other testing of this software 
has been done.

Hardware Notes and Recommendations.
----------------------------------

This PTF is targeted for the i486 and Pentium CPU's.