Patch Name:  PHKL_5551

Patch Description: s700 10.00 corrects NFS write performance problem

Creation Date: 95/05/06

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: No

Path Name:  /hp-ux_patches/s700/10.X/PHKL_5551

Symptoms:
        PHKL_5551:
        NFS write performance problem when MI or MI related products
        are used on HP-UX 10.0 systems.

Defect Description:
        PHKL_5551:
        The problem was caused by KI calling VOP_GETATTR() to get
        the device file path.  When a NFS file was involved, the
        VOP_GETATTR() call turned into the nfs_getattr() routine
        which does a nfs_fsync() before it calls the actual
        nfsgetattr() routine which did the real getattr work.
        The problem was reproduced by writing to a nfs mounted
        directory.  The performance of a write operation when
        MI was turned on was approximately double as slow as
        when MI was not turned on.
        The problem was proven when we modified the test
        program with the O_SYNCIO option to the open(2) call.
        the performance in this case whether or not MI was
        turned on was equally as slow as when MI was turned
        on in the previous case.

SR:
        1653127548

Patch Files:
        /usr/conf/lib/libhp-ux.a(sys_ki.o)
        /usr/conf/lib/libnfs.a(nfs_vnops.o)

what(1) Output:
        /usr/conf/lib/libhp-ux.a(sys_ki.o):
                sys_ki.c $Date: 95/05/05 16:21:14 $ $Revision: 1.16.
                        91.3 $ PATCH_10.0 (PHKL_5551)
        /usr/conf/lib/libnfs.a(nfs_vnops.o):
                nfs_vnops.c $Date: 95/05/06 11:25:04 $ $Revision: 1.
                        20.91.3 $ PATCH_10.0 (PHKL_5551)

cksum(1) Output:
        3843414519 51000 /usr/conf/lib/libhp-ux.a(sys_ki.o)
        4235582178 30984 /usr/conf/lib/libnfs.a(nfs_vnops.o)

Patch Conflicts: None

Patch Dependencies:  None

Hardware Dependencies:  None

Other Dependencies:  None

Supersedes:  None

Equivalent Patches: None

Patch Package Size:  130 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_5551

        5. Run swinstall to install the patch:

                swinstall -x autoreboot=true -x match_target=true
                        -s /tmp/PHKL_5551.depot

        By default swinstall will archive the original software in
        /var/adm/sw/patch/PHKL_5551.  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_5551.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_5551.depot -x
                        target_type=tape -d /dev/rmt/0m PHKL_5551

Special Installation Instructions:  None