Patch Name: PHKL_21933 Patch Description: s700 10.20 Multiprocessor graphics/interrupts/PM fixes Creation Date: 00/06/30 Post Date: 00/07/12 Hardware Platforms - OS Releases: s700: 10.20 Products: N/A Filesets: OS-Core.CORE-KRN Automatic Reboot?: Yes Status: General Release Critical: Yes PHKL_21933: PANIC PHKL_21516: PANIC PHKL_19883: HANG Path Name: /hp-ux_patches/s700/10.X/PHKL_21933 Symptoms: PHKL_21933: (SR: 8606139862 CR: JAGad09174) Possible data page fault panic related to internal thread manipulation. Panic stack trace may vary. PHKL_21516: (SR: 8606131455 CR: JAGad00605) System panics with trap type 15, data page fault. The stack may look like: resume_cleanup+0x378 resume+0x280 _swtch+0x138 real_sleep+0x330 _sleep_one+0x14 netisr_daemon+0x194 main+0x92c $vstart+0x34 $locore+0x74 PHKL_19883: On multiprocessor systems with VISUALIZE-FX graphics that are under a heavy I/O device interrupt load, the graphics subsystem may hang. Defect Description: PHKL_21933: (SR: 8606139862 CR: JAGad09174) Race condition when inserting a thread onto a sleep queue resulted in "ghosted" threads and pointers not correctly updated. Resolution: Modify insertion routine to place thread at the end of the queue if it is the lowest priority thread after walking the queue. Update queue and thread pointers appropriately. PHKL_21516: (SR: 8606131455 CR: JAGad00605) Some routines used the value of the previous thread pointer without verifying that it was valid, resulting in a trap type 15 and a system panic. Resolution: We now verify that the previous thread pointer is valid before dereferencing it. PHKL_19883: On multiprocessor systems, device interrrupts may be deferred when certain resources are in contention. Since VISUALIZE-FX graphics devices use interrupts for flow control, if their interrupts are deferred then the graphics card can be overrun, which will result in a graphics subsystem hang. Resoultion: Graphics interrupts will no longer be deferred. SR: 8606104451 8606131455 8606139862 Patch Files: /usr/conf/lib/libhp-ux.a(pm_swtch.o) /usr/conf/lib/libhp-ux.a(syscall.o) /usr/conf/lib/libhp-ux.a(trap.o) what(1) Output: /usr/conf/lib/libhp-ux.a(pm_swtch.o): pm_swtch.c $Date: 2000/06/30 11:51:05 $ $Revision : 1.7.98.24 $ PATCH_10.20 (PHKL_21933) /usr/conf/lib/libhp-ux.a(syscall.o): syscall.c $Date: 2000/04/24 11:56:22 $ $Revision: 1.6.98.10 $ PATCH_10.20 (PHKL_21516) /usr/conf/lib/libhp-ux.a(trap.o): trap.c $Date: 2000/04/24 11:43:11 $ $Revision: 1. 169.98.16 $ PATCH_10.20 (PHKL_21516) cksum(1) Output: 1248382013 23740 /usr/conf/lib/libhp-ux.a(pm_swtch.o) 3916106336 6396 /usr/conf/lib/libhp-ux.a(syscall.o) 3071457961 26380 /usr/conf/lib/libhp-ux.a(trap.o) Patch Conflicts: None Patch Dependencies: s700: 10.20: PHKL_16750 Hardware Dependencies: None Other Dependencies: None Supersedes: PHKL_19883 PHKL_21516 Equivalent Patches: PHKL_21934: s800: 10.20 Patch Package Size: 120 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_21933 5a. For a standalone system, run swinstall to install the patch: swinstall -x autoreboot=true -x match_target=true \ -s /tmp/PHKL_21933.depot By default swinstall will archive the original software in /var/adm/sw/patch/PHKL_21933. 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_21933.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_21933.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.