Patch Name: PHKL_23271

Patch Description: s700 10.26 msync() causes system hang

Creation Date: 01/02/07

Post Date:  01/02/27

Hardware Platforms - OS Releases:
	s700: 10.26

Products: N/A

Filesets:
	JournalFS.VXFS-BASE-KRN

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_23271: HANG

Path Name: /hp-ux_patches/s700/10.X/PHKL_23271

Symptoms:
	PHKL_23271:
	msync() on vxfs causes system hang

Defect Description:
	PHKL_23271:
	During the concurrent read and write on a memory mapped file
	residing on vxfs filesystem, the call to msync() causes the
	system hang.

	Resolution:
	There is no need to acquire the additional rwlock in
	vx_pageout() function.

SR:
	0000000000

Patch Files:
	/usr/conf/lib/libvxfs_base.a(vx_vm.o)

what(1) Output:
	/usr/conf/lib/libvxfs_base.a(vx_vm.o):
		01/02/02 kern/vxfs/vx_vm.c, hpux, hpux_10.26, ic5fl
			Revision 1.5 PATCH_10.26 (PHKL_23271)

cksum(1) Output:
	1977499787 13488 /usr/conf/lib/libvxfs_base.a(vx_vm.o)

Patch Conflicts: None

Patch Dependencies:
	s700: 10.26: PHKL_17282

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches:
	PHKL_23272:
	s800: 10.26

Patch Package Size: 70 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_23271

	5a. For a standalone system, run swinstall to install the
	    patch:

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHKL_23271.depot

	By default swinstall will archive the original software in
	/var/adm/sw/patch/PHKL_23271.  If you do not wish to retain a
	copy of the original software, you can create an empty file
	named /var/adm/sw/patch/PATCH_NOSAVE.

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

	It is recommended that you move the PHKL_23271.text file to
	/var/adm/sw/patch for future reference.

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

		dd if=/tmp/PHKL_23271.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions:
	This patch depends on base patch PHKL_17282.
	For successful installation, please ensure that PHKL_17282
	is in the same depot with this patch, or PHKL_17282 is
	already installed.