Patch Name: PHKL_29927

Patch Description: s700 10.26 VxFS perf enhancement patch

Creation Date: 03/10/22

Post Date: 03/10/29

Hardware Platforms - OS Releases:
	s700: 10.26

Products: N/A

Filesets:
	JournalFS.VXFS-BASE-KRN

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_29927: HANG

Path Name: /hp-ux_patches/s700/10.X/PHKL_29927

Symptoms:
	PHKL_29927:
	1. Port of 10.20 patch PHKL_23084 to 10.26 (TOS).
	(PHKL_23084:)
	(SR: 8606170112   CR: JAGad39375)
	System hangs while accessing the tail of a VxFS file of
	size greater than 2GB.

	(PHKL_19058:)
	( SR: 1653303750 CR: JAGab16358 )
	Creating a large number of files (such as > 4k) in a
	directory on a vxfs file system can take an unacceptably
	long time to complete, especially when compared to
	HP-UX 11.00.

Defect Description:
	PHKL_29927:
	1. Port of 10.20 patch PHKL_23084 to 10.26 (TOS).
	(PHKL_23084:)
	(SR: 8606170112   CR: JAGad39375)
	The function supposed to return the details of the
	extents of the file was returning HOLEs past the 2GB
	mark which caused the process to loop forever.

	Resolution:
	Return correct details of the extents past the 2GB
	mark from the function mapping the extents of a file.

	(PHKL_19058:)
	( SR: 1653303750 CR: JAGab16358 )
	On 10.20, VxFS 3.0 uses extents of size 1K blocks once
	the directory started to use indirect extents; i.e. once
	the directory became larger.  For 11.00 and VxFS 3.1,
	extents of size 8K are used.  Thus, on 10.20, there were
	8 times the number of extents to manage as with 11.00.

	Resolution:
	A change has been made to allow 10.20 to also use the
	larger extent size, and thus improve performance.

SR:
	1653303750 8606170112

Patch Files:
	/usr/conf/lib/libvxfs_base.a(vx_bmapext4.o)
	/usr/conf/lib/libvxfs_base.a(vx_dira.o)
	/usr/conf/lib/libvxfs_base.a(vx_dirl.o)

what(1) Output:
	/usr/conf/lib/libvxfs_base.a(vx_bmapext4.o):
		03/10/17 kern/vxfs/vx_bmapext4.c, hpux, hpux_10.26,
			ic5ij Revision 1.2 PATCH_10.26 (PHKL_29927)
	/usr/conf/lib/libvxfs_base.a(vx_dira.o):
		03/10/17 kern/vxfs/vx_dira.c, hpux, hpux_10.26, ic5i
			j Revision 1.5 PATCH_10.26 (PHKL_29927)
	/usr/conf/lib/libvxfs_base.a(vx_dirl.o):
		03/10/17 kern/vxfs/vx_dirl.c, hpux, hpux_10.26, ic5i
			j Revision 1.5 PATCH_10.26 (PHKL_29927)

cksum(1) Output:
	3442461709 11620 /usr/conf/lib/libvxfs_base.a(vx_bmapext4.o)
	2704947110 11160 /usr/conf/lib/libvxfs_base.a(vx_dira.o)
	4143233834 12616 /usr/conf/lib/libvxfs_base.a(vx_dirl.o)

Patch Conflicts: None

Patch Dependencies:
	s700: 10.26: PHKL_17282

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches:
	PHKL_29928:
	s800: 10.26

Patch Package Size: 80 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_29927

	5a. For a standalone system, run swinstall to install the
	    patch:

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHKL_29927.depot

	By default swinstall will archive the original software in
	/var/adm/sw/patch/PHKL_29927.  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_29927.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:

		dd if=/tmp/PHKL_29927.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None