Patch Name: PHKL_20359

Patch Description: s700 10.20 VxFS: fix for FS hang and file I/O enhancement

Creation Date: 99/11/04

Post Date:  99/11/11

Hardware Platforms - OS Releases:
	s700: 10.20

Products: N/A

Filesets:
	JournalFS.VXFS-BASE-KRN

Automatic Reboot?: Yes

Status: General Release

Critical:
	No (superseded patches were critical)
	PHKL_16977: HANG

Path Name: /hp-ux_patches/s700/10.X/PHKL_20359

Symptoms:
	PHKL_20359:
	( SR: 1653304253 DTS:  JAGab16493 )
	vx_fsync() may not give error, even if it did not work well.

	PHKL_20117:
	( SR: 5003460287 DTS: JAGab15234 )
	Customer experiences poor performance with file I/O
	on large systems like 6-way T600.

	PHKL_16977:
	unlink of "." on vxfs causes process hang;
	this can be reproduced by using unlink(1M):
	   unlink /some/vxfs/directory/.

Defect Description:
	PHKL_20359:
	( SR: 1653304253 DTS:  JAGab16493 )
	vx_fsync() was not checking for error flags in the
	inode i_intrflag. vx_fsync() should return ENXIO,
	if error flags are set in inode i_intrflag.

	Resolution:  Check whether error flags set in vx_inode
	i_intrflag, before returning from vx_fsync(), and return
	ENXIO, if so.

	PHKL_20117:
	( SR: 5003460287 DTS: JAGab15234 )
	Poor performance in file activity on large systems. Root
	cause is contention on filesys_sema in lockf().

	Resolution:
	To reduce filesys_sema hold time vx_rdwr() should call
	VX_MANDLOCK() to first check if mandatory locking is
	supported for file.

	PHKL_16977:
	If vx_remove() is called with name ".", it hangs when
	locking the inode because it's already locked.

SR:
	1653186361 1653304253 4701400556 5003460287

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

what(1) Output:
	/usr/conf/lib/libvxfs_base.a(vx_vnops.o):
		vx_vnops.c $Date: 99/11/02 12:56:25 $ $Revision: 1.8
			.98.32 $ PATCH_10.20 (PHKL_20359)

cksum(1) Output:
	3120952887 28524 /usr/conf/lib/libvxfs_base.a(vx_vnops.o)

Patch Conflicts: None

Patch Dependencies:
	s700: 10.20: PHKL_16750 PHKL_19058

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHKL_16977 PHKL_20117

Equivalent Patches:
	PHKL_20360:
	s800: 10.20

Patch Package Size: 90 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_20359

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

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHKL_20359.depot

	By default swinstall will archive the original software in
	/var/adm/sw/patch/PHKL_20359.  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_20359.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_20359.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.