Patch Name: PHKL_14607 Patch Description: s700 10.10 timer_settime, alarm, nanosleep cumulative patch Creation Date: 98/03/26 Post Date: 98/03/30 Hardware Platforms - OS Releases: s700: 10.10 Products: N/A Filesets: OS-Core.CORE-KRN Automatic Reboot?: Yes Status: General Superseded Critical: No (superseded patches were critical) PHKL_12108: PANIC HANG PHKL_11236: PANIC So far, the panic only appears on MP systems running the latest Informix release. Path Name: /hp-ux_patches/s700/10.X/PHKL_14607 Symptoms: PHKL_14607: sleep(3C) behaves incorrectly for values larger than (2^32-1)/200 = 21474836 seconds. The man page documents legal values up to 2^32-1 seconds + 10^9-1 nanoseconds. PHKL_12970: timer_settime(2) does not set 10ms timer interval properly. The smallest interval can be set is 20ms. PHKL_12892: Applications relying on alarm() returning a number greater than zero will fail if there was time remaining on the cancelled alarm and were trying to re-schedule the original alarm. alarm() returns "zero" when cancelling a previous alarm() with an alarm pending. PHKL_12108: System hangs on UP systems or spinlock deadlocks on MP systems, when using nanosleep system call. If using signals which were to be ignored when in nanosleep() we were awaken eventhough we should not. Patch is especially critical as soon as newer libc patches are installed on the system too. The first releases of libc to be critical are PHCO_10384 for 10.10, PHCO_11004 for 10.20 and PHCO_10652 for 10.01. PHKL_11236: Panic on S800 MP systems using 10.01+ with latest Informix Defect Description: PHKL_14607: The data path in the kernel code that supports sleep(3C) is not wide enough to support parameter values larger than 21474836 seconds. If a larger value is passed, incorrect arithmetic is performed, with results varying from immediate return (with or without error) to sleeping for the wrong length of time. PHKL_12970: A defect in the implementation of timer reload causes the 1 tick (10ms) interval be rounded to 2 ticks (20ms). PHKL_12892: alarm() rounds the time remaining to the nearest second so if the time remaining is less than 0.5 seconds, the result is rounded to zero. This makes it impossible to reschedule the original alarm. There was no check made in alarm() to determine if the result has been rounded to zero. The fix is to have a check to ensure that we never return zero if there was any time remaining. PHKL_12108: System hangs or panics when signal is received which has action set to ignore when in nanosleep system call. Libc patch that changed sleep()'s underlying system call to nanosleep() makes situation worse. PHKL_11236: Random S800 MP system panics when running the latest Informix because of a corner-case MP hole in nanosleep which is seen when nanosleep() is called from within a signal handler. SR: 1653216952 5003360024 5003366500 5003385393 Patch Files: /usr/conf/lib/libhp-ux.a(pm_timers.o) /usr/conf/lib/libhp-ux.a(subr_timers.o) what(1) Output: /usr/conf/lib/libhp-ux.a(pm_timers.o): pm_timers.c $Date: 98/03/26 09:55:07 $ $Revision: 1. 3.89.13 $ PATCH_10.10 (PHKL_14607) /usr/conf/lib/libhp-ux.a(subr_timers.o): subr_timers.c $Date: 97/10/22 10:34:23 $ $Revision: 1.3.89.18 $ PATCH_10.10 (PHKL_12970) cksum(1) Output: 961625948 6744 /usr/conf/lib/libhp-ux.a(pm_timers.o) 586835246 10464 /usr/conf/lib/libhp-ux.a(subr_timers.o) Patch Conflicts: None Patch Dependencies: None Hardware Dependencies: None Other Dependencies: None Supersedes: PHKL_11236 PHKL_12108 PHKL_12892 PHKL_12970 Equivalent Patches: PHKL_14608: s800: 10.10 Patch Package Size: 80 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_14607 5a. For a standalone system, run swinstall to install the patch: swinstall -x autoreboot=true -x match_target=true \ -s /tmp/PHKL_14607.depot 5b. For a homogeneous NFS Diskless cluster run swcluster on the server to install the patch on the server and the clients: swcluster -i -b This will invoke swcluster in the interactive mode and force all clients to be shut down. WARNING: All cluster clients must be shut down prior to the patch installation. Installing the patch while the clients are booted is unsupported and can lead to serious problems. The swcluster command will invoke an swinstall session in which you must specify: alternate root path - default is /export/shared_root/OS_700 source depot path - /tmp/PHKL_14607.depot To complete the installation, select the patch by choosing "Actions -> Match What Target Has" and then "Actions -> Install" from the Menubar. 5c. For a heterogeneous NFS Diskless cluster: - run swinstall on the server as in step 5a to install the patch on the cluster server. - run swcluster on the server as in step 5b to install the patch on the cluster clients. By default swinstall will archive the original software in /var/adm/sw/patch/PHKL_14607. 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_14607.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_14607.depot of=/dev/rmt/0m bs=2k Special Installation Instructions: None