Patch Name: PHKL_26002

Patch Description: s700_800 11.11 HFS Process Hang Fix

Creation Date: 02/01/20

Post Date:  02/01/31

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_26002: HANG

Category Tags:
	defect_repair general_release critical halts_system

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_26002

Symptoms:
	PHKL_26002:
	( SR:8606218660 CR:JAGad87808 )
	Processes may hang in a deadlock if they are unlinking and
	sync'ing a file at the same time.  This affects hfs file
	systems only.  These processes cannot be killed.

Defect Description:
	PHKL_26002:
	( SR:8606218660 CR:JAGad87808 )
	The process hang is caused by a lock ordering issue which
	results in a deadlock.

	Resolution:
	The resolution is to have the sync routine release the
	inode lock if it could not flush the buffer cache.  This
	will allow the thread which is doing the unlink to finish
	and release the lock on the buffer cache.  The sync code
	will then flush the cache.

SR:
	8606218660

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

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

what(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	/usr/conf/lib/libufs.a(ufs_subr.o):
		ufs_subr.c $Date: 2002/01/11 13:42:51 $Revision: r11
			.11/1 PATCH_11.11 (PHKL_26002)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	/usr/conf/lib/libufs.a(ufs_subr.o):
		ufs_subr.c $Date: 2002/01/11 13:42:51 $Revision: r11
			.11/1 PATCH_11.11 (PHKL_26002)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	2593882320 7204 /usr/conf/lib/libufs.a(ufs_subr.o)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	4263242899 16232 /usr/conf/lib/libufs.a(ufs_subr.o)

Patch Conflicts: None

Patch Dependencies: None

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_26002

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_26002.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_26002.  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_26002.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_26002.depot

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

		dd if=/tmp/PHKL_26002.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None