Patch Name:  PHKL_5537

Patch Description: s700 10.00 negative nice may lead to process hang

Creation Date: 95/05/05

Post Date:  95/05/22

Hardware Platforms - OS Releases:
        s700: 10.00

Products: N/A

Filesets:
        OS-Core.CORE-KRN

Automatic Reboot?: Yes

Status: General Release

Critical:
        Yes
        PHKL_5537: HANG
                NetWare/9000 is the only product for which this
                HPUX kernel patch may be critical.

Path Name:  /hp-ux_patches/s700/10.X/PHKL_5537

Symptoms:
        PHKL_5537:
        When a number of identical, negatively niced, timeshare
        processes are synchronizing through user level mechanisms,
        under some circumstances, these processes may hang.
        NetWare/9000 is one product that may face this problem.

Defect Description:
        PHKL_5537:
        Negatively niced timeshare processes are sometimes being
        incorrectly handled by the HP-UX scheduler.
        As of now, intensive use of NetWare/9000 is the only known
        instance of occurrence of the problem.

SR:
        4701291690

Patch Files:
        /usr/conf/lib/libhp-ux.a(pm_clockint.o)
        /usr/conf/lib/libhp-ux.a(pm_policy.o)

what(1) Output:
        /usr/conf/lib/libhp-ux.a(pm_clockint.o):
                pm_clockint.c $Date: 95/05/05 11:03:13 $ $Revision:
                        1.4.91.3 $ PATCH_10.0 (PHKL_5537)
        /usr/conf/lib/libhp-ux.a(pm_policy.o):
                pm_policy.c $Date: 95/05/05 11:04:32 $ $Revision: 1.
                        4.91.3 $ PATCH_10.0 (PHKL_5537)

cksum(1) Output:
        1033837288 5840 /usr/conf/lib/libhp-ux.a(pm_clockint.o)
        1112720604 13512 /usr/conf/lib/libhp-ux.a(pm_policy.o)

Patch Conflicts: None

Patch Dependencies:  None

Hardware Dependencies:  None

Other Dependencies:  None

Supersedes:  None

Equivalent Patches: None

Patch Package Size:  70 Kbytes

Installation Instructions:
        Please review all instructions and the Hewlett-Packard
        SupportLine User Guide or your Hewlett-Packard support terms
        and conditions for precautions, scope of license,
        restrictions, and, limitation of liability and warranties,
        before installing this patch.
        ------------------------------------------------------------
        1. Back up your system before installing a patch.

        2. Login as root.

        3. Copy the patch to the /tmp directory.

        4. Move to the /tmp directory and unshar the patch:

                cd /tmp
                sh PHKL_5537

        5. Run swinstall to install the patch:

                swinstall -x autoreboot=true -x match_target=true
                        -s /tmp/PHKL_5537.depot

        By default swinstall will archive the original software in
        /var/adm/sw/patch/PHKL_5537.  If you do not wish to retain a
        copy of the original software, you can create an empty file
        named /var/adm/sw/patch/PATCH_NOSAVE.

        Warning: If this file exists when a patch is installed, the
                 patch cannot be deinstalled.  Please be careful
                 when using this feature.

        It is recommended that you move the PHKL_5537.text file to
        /var/adm/sw/patch for future reference.

        To put this patch on a magnetic tape and install from the
        tape drive, use the command:

                swpackage -s /tmp/PHKL_5537.depot -x
                        target_type=tape -d /dev/rmt/0m PHKL_5537

Special Installation Instructions:  None