Patch Name: PHKL_19235

Patch Description: s700 10.20 Correct panics when using quotas on HFS

Creation Date: 99/07/16

Post Date:  99/07/20

Hardware Platforms - OS Releases:
	s700: 10.20

Products: N/A

Filesets:
	OS-Core.CORE-KRN

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_19235: PANIC
	PHKL_15996: PANIC

Path Name: /hp-ux_patches/s700/10.X/PHKL_19235

Symptoms:
	PHKL_19235:
	( SR: 5003467506 DTS: JAGab25294 )
	The system panics with a a data page fault panic in
	getdiskquota when using sendmail.

	PHKL_15996:
	( SR: 5003415380 DTS: JAGaa09972 )
	Getting persistent panics in diskquota code when executing
	sendmail commands.

Defect Description:
	PHKL_19235:
	( SR: 5003467506 DTS: JAGab25294 )
	The fix delivered in patch PHKL_15996 closed one of the
	possible problems with disk quotas where a quota entry may
	be on the freelist, but still needs to be written to disk.
	A race condition would occur as the quota entry was being
	updated, but another process would remove it from the
	freelist.  However, there were 2 other routines where this
	problem could also occur.

	Resolution:
	The resolution was to take the fix from PHKL_19556, which
	was applied to the quota sync routine, and apply it to the
	other 2 routines as well.  The fix is that if a quota entry
	is on the free list, marked as needing to be written out to
	disk, then it is removed from the freelist before it is
	written out, and then placed back on the freelist
	afterwards.

	PHKL_15996:
	( SR: 5003415380 DTS: JAGaa09972 )
	Getting persistent panics in diskquota code when executing
	sendmail commands.

	sendmail -bd -q30m -AA192643145 <system_name>.
	Then PANIC occurs only with a combination of SCSI I/O issues
	and the sendmail command execution.

SR:
	5003415380 5003467506

Patch Files:
	/usr/conf/lib/libhp-ux.a(quot_scall.o)
	/usr/conf/lib/libhp-ux.a(quota.o)

what(1) Output:
	/usr/conf/lib/libhp-ux.a(quot_scall.o):
		quot_scall.c $Date: 99/07/15 12:39:48 $ $Revision: 1
			.13.98.6 $ PATCH_10.20 (PHKL_19235)
	/usr/conf/lib/libhp-ux.a(quota.o):
		quota.c $Date: 99/07/15 12:37:06 $ $Revision: 1.9.98
			.4 $ PATCH_10.20 (PHKL_19235)

cksum(1) Output:
	2787369431 5828 /usr/conf/lib/libhp-ux.a(quot_scall.o)
	3969856922 4560 /usr/conf/lib/libhp-ux.a(quota.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHKL_15996

Equivalent Patches:
	PHKL_19236:
	s800: 10.20

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_19235

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

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHKL_19235.depot

	By default swinstall will archive the original software in
	/var/adm/sw/patch/PHKL_19235.  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_19235.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_19235.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None