Patch Name: PHKL_30442

Patch Description: s700_800 11.23 mpurgevfs() patch

Creation Date: 04/07/16

Post Date: 04/07/20

Hardware Platforms - OS Releases:
	s700: 11.23
	s800: 11.23

Products: N/A

Filesets:
	OS-Core.CORE2-KRN,fr=B.11.23,fa=HP-UX_B.11.23_IA,v=HP

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_30442: HANG

Category Tags:
	defect_repair general_release critical halts_system

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_30442

Symptoms:
	PHKL_30442:
	( SR:8606325344 CR:JAGae87634 )
	Certain commands may seem to cause a system hang.
	mount(2), umount(2) & sync(2) syscalls may run very slowly
	on systems with large amounts of RAM.  This affects boot
	time, shutdown time and activities such as mount, umount,
	df, bdf, rlogin and sync during normal system operation.

	( SR:8606332041 CR:JAGae93161 )
	umount()s may take a long time.

Defect Description:
	PHKL_30442:
	( SR:8606325344 CR:JAGae87634 )
	The basic problems are that several lists whose length
	is proportional to RAM size are processed serially, with
	unnecessary locking and/or no provision for early exit.

	Resolution:
	This fix
	avoids unnecessary locking of empty buckets.

	( SR:8606332041 CR:JAGae93161 )
	Every hash bucket is locked before checking
	to see if there is anything in it.

	Resolution:
	Only lock hash buckets for processing
	which have something in them.

Enhancement:
	No

SR:
	8606325344 8606332041

Patch Files:
	
	OS-Core.CORE2-KRN,fr=B.11.23,fa=HP-UX_B.11.23_IA,v=HP:
	/usr/conf/lib/libvm.a(vm_pgcache.o)

what(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.23,fa=HP-UX_B.11.23_IA,v=HP:
	/usr/conf/lib/libvm.a(vm_pgcache.o):
		vm_pgcache.c $Date: 2004/07/15 11:05:33 $Revision: r
			11.23/2 PATCH_11.23 (PHKL_30442)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.23,fa=HP-UX_B.11.23_IA,v=HP:
	2558575601 37592 /usr/conf/lib/libvm.a(vm_pgcache.o)

Patch Conflicts: None

Patch Dependencies:
	s700: 11.23: PHCO_30440 PHKL_30443 PHKL_30444 PHKL_30445
		PHKL_30471 PHKL_30506
	s800: 11.23: PHCO_30440 PHKL_30443 PHKL_30444 PHKL_30445
		PHKL_30471 PHKL_30506

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches: None

Patch Package Size: 30 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_30442

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_30442.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_30442.  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_30442.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_30442.depot

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

		dd if=/tmp/PHKL_30442.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None