Patch Name: PHKL_30399

Patch Description: s700_800 11.00 KI nfs performance fix and KI panic fix

Creation Date: 04/02/05

Post Date: 04/03/31

Hardware Platforms - OS Releases:
	s700: 11.00
	s800: 11.00

Products: N/A

Filesets:
	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_32,v=HP
	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_30399: PANIC
	PHKL_15782: PANIC

Category Tags:
	defect_repair general_release critical panic

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_30399

Symptoms:
	PHKL_30399:
	( SR:8606345226 CR:JAGaf06076 )
	System panics with "data page fault" if Kernel
	Instrumentation (KI) tracing is enabled and the system
	reads a symbolic link to a very long (1024 or more
	characters) pathname using NFS Version 3 protocol.
	The stack trace may look similar to the following:
		panic+0x60
		report_trap_or_int_and_panic+0x5c
		trap+0xf58
		$RDB_trap_patch+0x30
		strlen+0xc
		ki_rfscall+0x300
		rfscall+0x47c
		rfs3call+0x78
		nfs3_readlink+0x144
		readlink+0xb8
		syscall+0x6ec
		$syscallrtn+0x0

	PHKL_16074:
	Decreased NFS performance when KI active on NFS clients.

	PHKL_15782:
	Customer runs performance tools on the system and has had
	several panics.
	Possible data page fault panic in KI on PV3 NFS clients.

Defect Description:
	PHKL_30399:
	( SR:8606345226 CR:JAGaf06076 )
	The maximum pathname in HP-UX is limited to 1024 characters.
	Linux has a larger limit and NFS Version 3 exposes it.
	Calculating the size of a pathname KI code assumes that the
	pathname pointer obtained from the NFS code is valid. This
	assumption is invalid in a heterogeneous NFS environment.

	Resolution:
	Do not calculate the pathname size. Use the size provided
	by the NFS Version 3 server in symbolic link attributes.

	PHKL_16074:
	Decreased NFS write performance seen on 11.0 NFS client
	systems seen when the midaemon was running.  The midaemon
	activates the KI instrumentation which increased the
	NFS write path length in 11.0 by causing needless block
	flushes so that the KI does not affect NFS performance.
	The midaemon is used by the performance tools HP GlancePlus
	and the MeasureWare Agent. Customers using Glance
	or MeasureWare on 11.0 NFS client systems should install
	this patch.

	PHKL_15782:
	Data page fault panic may occur on 11.0 NFS PV3 client
	systems when the midaemon was running.  The KI
	instrumentation activated by the midaemon had an error
	in the NFS I/O path, casting a wrong pointer in
	ki_do_bio() and then accessing it.  The panic is most
	likely to occur when swapping over a PV3 NFS mount.
	Customers using Glance or MeasureWare on 11.0 NFS client
	systems should install this patch.

Enhancement:
	No

SR:
	4701394023 5003426627 8606345226

Patch Files:
	
	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_32,v=HP:
	/usr/conf/lib/libhp-ux.a(sys_ki.o)

	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP:
	/usr/conf/lib/libhp-ux.a(sys_ki.o)

what(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_32,v=HP:
	/usr/conf/lib/libhp-ux.a(sys_ki.o):
		sys_ki.c $Date: 2004/01/30 02:47:56 $Revision: r11ro
			s/9 PATCH_11.00 (PHKL_30399)

	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP:
	/usr/conf/lib/libhp-ux.a(sys_ki.o):
		sys_ki.c $Date: 2004/01/30 02:47:56 $Revision: r11ro
			s/9 PATCH_11.00 (PHKL_30399)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_32,v=HP:
	3513853328 44932 /usr/conf/lib/libhp-ux.a(sys_ki.o)

	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP:
	1575860093 118200 /usr/conf/lib/libhp-ux.a(sys_ki.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHKL_16074 PHKL_15782

Equivalent Patches:
	PHKL_30398:
	s700: 11.11
	s800: 11.11

	PHKL_30400:
	s700: 11.23
	s800: 11.23

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_30399

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_30399.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_30399.  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_30399.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_30399.depot

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

		dd if=/tmp/PHKL_30399.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None