Patch Name:  PHKL_5711

Patch Description: s700 10.00 panic: wait_for_lock_spinner: Already own lock!

Creation Date: 95/06/21

Post Date:  95/06/23

Hardware Platforms - OS Releases:
        s700: 10.00

Products: N/A

Filesets:
        OS-Core.CORE-KRN

Automatic Reboot?: Yes

Status: General Release

Critical:
        Yes
        PHKL_5711: PANIC

Path Name:  /hp-ux_patches/s700/10.X/PHKL_5711

Symptoms:
        PHKL_5711:
                This patch fixes a panic "wait_for_lock_spinner:
                Already own this lock!"  The panic only occurs
                on MP systems.

                The stack trace looks like this:

                  panic+0x1c
                  wait_for_lock_spinner+0x30
                  wait_for_lock_4way+0x2c
                  sl_retry+0x18
                  inferior+0x30
                  ttiocom+0xf48
                  pty1_ioctl+0x13c
                  ufs_ioctl+0xec
                  vno_ioctl+0x13c
                  ioctl+0x378

Defect Description:
        PHKL_5711:
        The root cause is a bug in MP locking where the process
        management code attempts to get a lock that it already
        owns.  The fix was to allow for nesting of the locking
        code.

SR:
        1653134304

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

what(1) Output:
        /usr/conf/lib/libhp-ux.a(pm_proc.o):
                pm_proc.c $Date: 95/06/21 09:40:44 $ $Revision: 1.11
                        .91.2 $ PATCH_10.0 (PHKL_5711)

cksum(1) Output:
        2374423508 11200 /usr/conf/lib/libhp-ux.a(pm_proc.o)

Patch Conflicts: None

Patch Dependencies:  None

Hardware Dependencies:  None

Other Dependencies:  None

Supersedes:  None

Equivalent Patches:
        PHKL_5710:
        s800: 9.04

        PHKL_5712:
        s800: 10.00

Patch Package Size:  60 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_5711

        5. Run swinstall to install the patch:

                swinstall -x autoreboot=true -x match_target=true
                        -s /tmp/PHKL_5711.depot

        By default swinstall will archive the original software in
        /var/adm/sw/patch/PHKL_5711.  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_5711.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_5711.depot -x
                        target_type=tape -d /dev/rmt/0m PHKL_5711

Special Installation Instructions:  None