Patch Name: PHKL_30234

Patch Description: s700_800 11.23 physio buffers to default, max procs panics

Creation Date: 03/12/18

Post Date: 04/01/13

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_30234: PANIC

Category Tags:
	defect_repair general_release critical panic

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_30234

Symptoms:
	PHKL_30234:
	( SR:8606334083 CR:JAGae95167 )
	System panic when setting kernel tunable physical_io_buffers
	explicitly to the value of 0 when the tunable is already at
	the default (0).

	panic: post_hndlr(): Unresolved kernel interruption

	Stack Trace:
	  IP                  Function Name
	  0xe0000000004f7ca0  post_hndlr+0xc20
	  0xe0000000004fb9c0  vm_hndlr+0x220
	  0xe000000001059bc0  bubbledown
	  0xe0000000005014d0  kmem_arena_free+0x130
	  0xe0000000011287e0  physio_resize_buflists+0x2e0
	  0xe000000001127b20  physical_io_buffers_commit+0x20
	  0xe00000000110e380  physical_io_buffers_handler+0xe0
	  0xe000000000e1d7c0  ken_invoke_handler+0x210
	  0xe000000000e215e0  _ken_byo_trigger_mevents+0x810
	  0xe000000000e20d90  _ken_trigger_multiple_events+0x30
	  0xe000000000e1d520  ken_trigger_multiple_events+0x40
	  0xe00000000103d1d0  ktune_validate_min_max+0x590
	  0xe00000000103ca80  settune_txn_version_1+0x1900
	  0xe0000000010386a0  settune+0xb40
	  0xe00000000103aa90  settune_txn+0x5d0
	  0xe0000000004ea4b0  syscall+0x940
	End of Stack Trace.

	( SR:8606329562 CR:JAGae90685 )
	System panic when booting a system with the maximum number
	of processors supported by the kernel while setting up
	the physio subsystem buffer freelists.

	panic: assertion error
	Stack Trace:
	  IP                  Function Name
	  0xe00000000126d840  assfail+0x70
	  0xe000000000a9ef20  USRRSESTK_LOW+0x80
	  0xe000000000a8a680  hdl_vfault+0x680
	  0xe00000000140da80  vfault+0x310
	  0xe0000000012b1e80  vm_hndlr+0x2a0
	  0xe0000000012b97a0  bubbledown
	  0xe0000000012c1270  sl_pre_check+0x70
	  0xe0000000012bf7a0  spinlock+0x50
	  0xe0000000013fc240  physio_allocate_and_add_bufs+0x240
	  0xe0000000013fccb0  physio_init_mp+0x240
	  0xe000000000fba260  im_physio_init_mp+0x40
	  0xe0000000013a9eb0  DoCalllist+0x3a0
	End of Stack Trace

Defect Description:
	PHKL_30234:
	( SR:8606334083 CR:JAGae95167 )
	The physical_io_buffers handler attempts to return memory
	which was never allocated when invoked for no-change
	operations.

	Resolution:
	The physical_io_buffers handler was modified to handle
	no-change operations properly.

	( SR:8606329562 CR:JAGae90685 )
	The physio freelists are organized in a table with a global
	list followed by per-processor lists. The locks controlling
	access to the per-processor lists are in a separate table
	without a global lock. So for cpu N, the freelist is in
	position N+1 and the lock is in position N.

	The physio initialization code was improperly using
	position N+1 for both tables, resulting in a reference
	beyond the valid table space for the lock tables for the
	last cpu within the table allocation. Since the lock
	table is allocated for the maximum number of processors
	which the kernel can handle, this was only encountered
	during advanced platform development.

	Resolution:
	The physio table reference was corrected to use the correct
	table position.

Enhancement:
	No

SR:
	8606329562 8606334083

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

what(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.23,fa=HP-UX_B.11.23_IA,v=HP:
	/usr/conf/lib/libvm.a(physio.o):
		physio.c $Date: 2003/12/17 12:43:22 $Revision: r11.2
			3/1 PATCH_11.23 (PHKL_30234)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.23,fa=HP-UX_B.11.23_IA,v=HP:
	1244270866 51896 /usr/conf/lib/libvm.a(physio.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_30234

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_30234.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_30234.  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_30234.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_30234.depot

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

		dd if=/tmp/PHKL_30234.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None