Patch Name: PHKL_28944

Patch Description: s700_800 11.00 Cumulative superpage patch

Creation Date: 03/09/08

Post Date: 03/10/08

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_28944: PANIC
	PHKL_19246: PANIC

Category Tags:
	defect_repair general_release critical panic

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_28944

Symptoms:
	PHKL_28944:
	( SR:8606276657 CR:JAGae40734 )
	When the system is running low on memory and an application
	which uses locked superpages for text ("chatr +pi L" had to
	have been run on the application), the system may panic with
	the panic string "blocking on owned semaphore".  The stack
	trace will resemble:

	_mp_b_sema_sleep
	hash_insert
	addtocache
	vm_fill_in_pages
	vm_prepare_io
	vx_do_pagein
	vx_pagein
	virtual_fault
	vfault
	trap
	nokgdb

	PHKL_19246:
	(SR: 8606103195 DTS: JAGaa13078)
	The "mkfs" command on a system running VERITAS' Volume
	Manager (VxVM) product may fail unexpectedly on a read
	attempt from a raw device into the user stack area.

Defect Description:
	PHKL_28944:
	( SR:8606276657 CR:JAGae40734 )
	When the system is running low on memory and an application
	which uses locked superpages for text unlocks the pages, the
	superpages will subsequently be paged in through the normal
	fault path, which is inappropriate for large text pages and
	can result in a panic.  Large text pages should always be
	paged in through the buffer cache, not the fault path.

	Resolution:
	Modified the code to set a flag to ensure large text pages
	are always paged in through the buffer cache.

	PHKL_19246:
	(SR: 8606103195 DTS: JAGaa13078)
	any_superpages_present() will fail to detect superpages when
	all these conditions apply-

	-- the first page in a range is 4K
	-- the next page is a superpage
	-- the offset to start checking for "superness" is not 4K
	   aligned
	-- the length (in bytes) of the range to be checked is <=4K

	Resolution:
	The fix is to make sure we start examining pages at a 4K
	boundary.

Enhancement:
	No

SR:
	8606103195 8606276657

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(vm_superpage.o)

	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP:
	/usr/conf/lib/libhp-ux.a(vm_superpage.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(vm_superpage.o):
		vm_superpage.c $Date: 2003/04/01 10:26:39 $Revision:
			 r11ros/12 PATCH_11.00 (PHKL_28944)

	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP:
	/usr/conf/lib/libhp-ux.a(vm_superpage.o):
		vm_superpage.c $Date: 2003/04/01 10:26:39 $Revision:
			 r11ros/12 PATCH_11.00 (PHKL_28944)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_32,v=HP:
	2569161781 15316 /usr/conf/lib/libhp-ux.a(vm_superpage.o)

	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP:
	340829068 31288 /usr/conf/lib/libhp-ux.a(vm_superpage.o)

Patch Conflicts: None

Patch Dependencies:
	s700: 11.00: PHKL_18543
	s800: 11.00: PHKL_18543

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHKL_19246 

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_28944

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_28944.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_28944.  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_28944.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_28944.depot

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

		dd if=/tmp/PHKL_28944.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None