Patch Name: PHKL_30753

Patch Description: s700_800 11.23 Fix system call sched_getscheduler()

Creation Date: 04/04/21

Post Date: 04/06/09

Hardware Platforms - OS Releases:
	s700: 11.23
	s800: 11.23

Products: N/A

Filesets:
	OS-Core.CORE2-KRN,fr=B.11.23,fa=HP-UX_B.11.23_IA,v=HP

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_30753: HANG
		If repeated calls are made to the system call
		sched_getscheduler(), then fork calls will
		ultimately fail leading to a system that is
		unusable until the system is rebooted.

Category Tags:
	defect_repair general_release critical halts_system

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_30753

Symptoms:
	PHKL_30753:
	( SR:8606356258 CR:JAGaf16964 )
	The sched_getscheduler() system call is consuming system
	resources that are never freed back to the system.
	Frequent use of this system call may lead to an unusable
	system, or system hang, which can be cleared only
	by rebooting the system.

Defect Description:
	PHKL_30753:
	( SR:8606356258 CR:JAGaf16964 )
	The kernel resources for a process specified as the target
	of the sched_getscheduler() system call are not freed
	when the process exits. When there are many such processes,
	the system runs out of process resources leading to
	an unusable system where no new processes can be created.

	Resolution:
	Change the system call sched_getscheduler() to correctly
	free process resources before returning.

Enhancement:
	No

SR:
	8606356258

Patch Files:
	
	OS-Core.CORE2-KRN,fr=B.11.23,fa=HP-UX_B.11.23_IA,v=HP:
	/usr/conf/lib/libpm.a(pm_rtsched.o)

what(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.23,fa=HP-UX_B.11.23_IA,v=HP:
	/usr/conf/lib/libpm.a(pm_rtsched.o):
		pm_rtsched.c $Date: 2004/04/21 11:11:25 $Revision: r
			11.23/1 PATCH_11.23 (PHKL_30753)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.23,fa=HP-UX_B.11.23_IA,v=HP:
	910666149 66520 /usr/conf/lib/libpm.a(pm_rtsched.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches: None

Patch Package Size: 40 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_30753

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_30753.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_30753.  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_30753.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_30753.depot

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

		dd if=/tmp/PHKL_30753.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None