Patch Name: PHKL_27532

Patch Description: s700_800 11.11 ServiceGuard/vsar incompatibility removed

Creation Date: 02/09/06

Post Date:  02/10/17

Hardware Platforms - OS Releases:
	s700: 11.11
	s800: 11.11

Products: N/A

Filesets:
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_27532: CORRUPTION

Category Tags:
	defect_repair general_release critical corruption

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_27532

Symptoms:
	PHKL_27532:
	( SR:8606258770 CR:JAGae23090 )
	This problem occurs on systems running MC/ServiceGuard and
	either of the unsupported performance tools 'cyclemeter' or
	'vsar.'  Because of this defect, an MC/ServiceGuard system
	did not TOC after cmcld failfast.  Data corruption results
	from the continued operation of the system that was supposed
	to stop running with a TOC.

Defect Description:
	PHKL_27532:
	( SR:8606258770 CR:JAGae23090 )
	'cyclemeter' and 'vsar' are unofficial tools for HP-UX.
	These tools are not certified for use on customer systems.

	The tools cyclemeter and vsar are unaware of MC/ServiceGuard
	and MC/ServiceGuard is unaware of the tools. However, both
	MC/ServiceGuard and the tools make use of a kernel facility
	that provides a 'callback' on each clock tick. This facility
	is designed to handle only one callback function. As long
	as only MC/ServiceGuard or only the tools were using the
	callback facility, there was no conflict. However, when
	MC/ServiceGuard is already using the callback facility and
	either cyclemeter or vsar is started, the tools replace the
	MC/ServiceGuard callback function with their own function
	pointer and then very quickly replace the function pointer
	with NULL, turning off the callback. The result is that
	MC/ServiceGuard stops getting its callback at each clock
	tick.  This disrupts the MC/ServiceGuard failfast operation
	and prevents the TOC.

	Resolution:
	cyclemeter and vsar performance monitoring tools will use a
	new mechanism to get a callback per clock tick.  Therefore
	these tools will not interfere with MC/ServiceGuard.

Enhancement:
	No

SR:
	8606258770

Patch Files:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	/usr/conf/lib/libperf.a(ivt_intercept.o)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	/usr/conf/lib/libperf.a(ivt_intercept.o)

what(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	/usr/conf/lib/libperf.a(ivt_intercept.o):
		ivt_intercept.c $Date: 2002/07/16 08:56:53 $Revision
			: r11.11/1 PATCH_11.11 (PHKL_27532)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	/usr/conf/lib/libperf.a(ivt_intercept.o):
		ivt_intercept.c $Date: 2002/07/16 08:56:53 $Revision
			: r11.11/1 PATCH_11.11 (PHKL_27532)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	985539315 8256 /usr/conf/lib/libperf.a(ivt_intercept.o)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	3514177465 19704 /usr/conf/lib/libperf.a(ivt_intercept.o)

Patch Conflicts: None

Patch Dependencies:
	s700: 11.11: PHKL_27531
	s800: 11.11: PHKL_27531

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches: None

Patch Package Size: 50 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_27532

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_27532.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_27532.  If you do not wish to retain a
	copy of the original software, include the patch_save_files
	option in the swinstall command above:

		-x patch_save_files=false

	WARNING: If patch_save_files is false when a patch is installed,
		 the patch cannot be deinstalled.  Please be careful
		 when using this feature.

	For future reference, the contents of the PHKL_27532.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_27532.depot

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

		dd if=/tmp/PHKL_27532.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None