Patch Name: PHKL_19383

Patch Description: s700 10.20 fcntl/mmap fix, 4 GB file offsets with mmap64

Creation Date: 99/08/09

Post Date:  99/08/10

Hardware Platforms - OS Releases:
	s700: 10.20

Products: N/A

Filesets:
	OS-Core.CORE-KRN

Automatic Reboot?: Yes

Status: General Superseded

Critical: No

Path Name: /hp-ux_patches/s700/10.X/PHKL_19383

Symptoms:
	PHKL_19383:
	mmap64(2) returns an error when used to map portions of a
	file beyond the 2 GB file offset.

	PHKL_16880:
	It is possible for "munmap" to unexpectedly release the
	lock that is obtained from "fcntl".  The application may
	experience an unexpected behavior because of this.
	Therefore, this patch is to rectify this unexpected
	behavior.

Defect Description:
	PHKL_19383:
	mmap64(2) previously only supported file offsets up to 2 GB.
	Resolution:
	The mmap64(2) system call has been enhanced to support file
	offsets up to 4 GB.

	PHKL_16880:
	To correct the problem, the associations between
	"memory mapped file" and the system-wide file table
	reference count is removed.  (i.e. The reference count
	is no longer stored in the system wide file table,
	however, the vnode reference counter still gets updated
	when "mmap" and "munmap".)

SR:
	1653270546 1653277004

Patch Files:
	/usr/conf/lib/libhp-ux.a(vm_mmap.o)
	/usr/conf/lib/libhp-ux.a(vm_pregion.o)

what(1) Output:
	/usr/conf/lib/libhp-ux.a(vm_mmap.o):
		vm_mmap.c     $Date: 99/08/09 09:49:44 $ $Revision:
			1.17.98.21 $ PATCH_10.20 (PHKL_19383)
	/usr/conf/lib/libhp-ux.a(vm_pregion.o):
		vm_pregion.c  $Date: 98/11/09 12:45:48 $ $Revision:
			1.16.98.14 $ PATCH_10.20 (PHKL_16880)

cksum(1) Output:
	2671705764 21376 /usr/conf/lib/libhp-ux.a(vm_mmap.o)
	1628516444 11928 /usr/conf/lib/libhp-ux.a(vm_pregion.o)

Patch Conflicts: None

Patch Dependencies:
	s700: 10.20: PHKL_16750

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHKL_16880

Equivalent Patches:
	PHKL_19384:
	s800: 10.20

Patch Package Size: 100 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_19383

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

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHKL_19383.depot

	By default swinstall will archive the original software in
	/var/adm/sw/patch/PHKL_19383.  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_19383.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_19383.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions:
	This patch depends on base patch PHKL_16750.
	For successful installation, please ensure that PHKL_16750
	is in the same depot with this patch, or PHKL_16750 is
	already installed.