Patch Name: PHKL_23337

Patch Description: s700_800 11.11 Side effect of madvise() call fixed

Creation Date: 01/02/12

Post Date:  01/05/01

Hardware Platforms - OS Releases:
	s700: 11.11
	s800: 11.11

Products: N/A

Filesets:
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_23337: PANIC

Category Tags:
	defect_repair general_release critical panic

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_23337

Symptoms:
	PHKL_23337:
	( SR:8606164210 CR:JAGad33510 )
	There are a couple of ways in which this problem might
	manifest itself. All of them will be panics, with the
	following stack traces:

	Panic 1: 11.11 1009_2208: panic mp_b_sema_asleep: blocking
	on a semaphore owned

	Stack trace of event 0:
	stack trace for event 0
	crash event was a panic
	panic+0x14
	_mp_b_sema_sleep+0x284
	b_psema+0x224
	vaslockpages+0x248
	vx_memlock+0xcc
	vx_dio_iovec+0x178
	vx_dio_rdwri+0x1b4
	vx_write1+0x564
	vx_rdwr+0x168
	vno_rw+0xa4
	rwuio+0x13c
	aio_rw_child_thread+0x22c
	kthread_daemon_startup+0x24
	kthread_daemon_startup+0x0
	panic+0x14

	Panic 2: 11.11 0921_1145: assert failed: (lock_read: lock
	already owned)

	Stack trace of event 0:
	stack trace for event 0
	crash event was a panic
	panic+0x14
	assfail+0x3c
	_assfail+0x2c
	lock_read+0x590
	vfault+0x26c
	trap+0x137c
	nokgdb+0x8
	accwriteloop+0x0
	check_beta+0x44
	b_psema+0x2c
	vaslockpages+0x248
	vx_memlock+0xcc
	vx_dio_iovec+0x178
	vx_dio_rdwri+0x1b4
	vx_write1+0x564
	vx_rdwr+0x168
	vno_rw+0xa4
	rwuio+0x13c
	aio_rw_child_thread+0x22c
	kthread_daemon_startup+0x24
	kthread_daemon_startup+0x0
	check_beta+0x44

	Panic 3: 11.11 1031_1420: assertion failed (lock_read: lock
	already owned)

	Stack trace of event 0:
	stack trace for event 0
	crash event was a panic
	panic+0x6c
	assfail+0x3c
	_assfail+0x2c
	lock_read+0x5bc
	vfault+0x26c
	trap+0x13c4
	nokgdb+0x8
	accwriteloop+0x0
	check_beta+0x44
	b_psema+0x2c
	vaslockpages+0x248
	vx_memlock+0xcc
	vx_dio_iovec+0x178
	vx_dio_rdwri+0x1b4
	vx_write1+0x564
	vx_rdwr+0x168
	vno_rw+0xa4
	rwuio+0x13c
	aio_rw_child_thread+0x22c
	kthread_daemon_startup+0x24
	kthread_daemon_startup+0x0
	check_beta+0x44

Defect Description:
	PHKL_23337:
	( SR:8606164210 CR:JAGad33510 )
	This defect uncovered a very rare and also a corner case of
	madvise() implementation. The user program() using
	madvise(), has to be synchronized in a very bad way to hit
	this corner case. One example is: the user program is
	deleting a shared memory mapped file, with no concern for
	others who are sharing the same file.

	Resolution:
	If a shared file is deleted, then we have incorporated a
	way in which the other users of the shared file also get
	this information aboyt the change in file status.

SR:
	8606164210

Patch Files:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	/usr/conf/lib/libvm.a(vm_misc.o)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	/usr/conf/lib/libvm.a(vm_misc.o)

what(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	/usr/conf/lib/libvm.a(vm_misc.o):
		vm_misc.c $Date: 2001/02/06 22:12:50 $Revision: r11.
			11/1 PATCH_11.11 (PHKL_23337)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	/usr/conf/lib/libvm.a(vm_misc.o):
		vm_misc.c $Date: 2001/02/06 22:12:50 $Revision: r11.
			11/1 PATCH_11.11 (PHKL_23337)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	1412606154 12736 /usr/conf/lib/libvm.a(vm_misc.o)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	68742781 26240 /usr/conf/lib/libvm.a(vm_misc.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches: None

Patch Package Size: 60 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_23337

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_23337.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_23337.  If you do not wish to retain a
	copy of the original software, use the patch_save_files option:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -x patch_save_files=false -s /tmp/PHKL_23337.depot

	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_23337.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_23337.depot

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

		dd if=/tmp/PHKL_23337.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None