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OpenVMS ALPDRIV07_070 Alpha V7.0 PUDRIVER ECO Summary

NOTE: An OpenVMS saveset or PCSI installation file is stored on the Internet in a self-expanding compressed file. The name of the compressed file will be kit_name-dcx_vaxexe for OpenVMS VAX or kit_name-dcx_axpexe for OpenVMS Alpha. Once the file is copied to your system, it can be expanded by typing RUN compressed_file. The resultant file will be the OpenVMS saveset or PCSI installation file which can be used to install the ECO. Copyright (c) Digital Equipment Corporation 1997. All rights reserved. PRODUCT: OpenVMS Alpha COMPONENT: SYS$PUDRIVER.EXE SOURCE: Digital Equipment Corporation ECO INFORMATION: ECO Kit Name: ALPDRIV07_070 ECO Kits Superseded by This ECO Kit: None ECO Kit Approximate Size: 252 Blocks Kit Applies To: OpenVMS Alpha V7.0 System/Cluster Reboot Necessary: Yes Installation Rating: 2 - To be installed on all systems running the listed version(s) of OpenVMS and using the following feature(s): Any system running OpenVMS V7.0 that uses the PUDRIVER. NOTE: In order to receive the full fixes listed in this kit, the following remedial kits also need to be installed: None ECO KIT SUMMARY: An ECO kit exists for SYS$PUDRIVER.EXE on OpenVMS Alpha V7.0. This kit addresses the following problems: o A system crash occurs when an attempt is made to place a CDRP into a wait state and the CDRP is already in another incompatible wait state. The system has no messages available, and some CDRPs have been placed into the message wait queue. A message response frees a message which is placed in the response ring. Another message becomes available and the response ring fills up. A check is then made for message waiters. A waiter is found and a successful attempt is made to start it. An attempt is then made to start the next waiter, but there are no more messages so the system begins looking for one. When a message is found, a call is made into the SCS routine to start the first waiter which is the waiter that originally started the loop. Eventually, a return is made to the first waiter which was already started in an inner loop. The system then either waits or starts the waiter again which causes it to be in two states at the same time. This problem will only occur with a KCM44 controller because it issues the system 45 credits which are enough to exhaust the message queue if a heavy amount of IO is occurring. INSTALLATION NOTES: In order for the corrections in this kit to take effect, the system must be rebooted. If the system is a member of a VMScluster, the entire cluster should be rebooted.



This patch can be found at any of these sites:

Colorado Site
Georgia Site



Files on this server are as follows:

alpdriv07_070.README
alpdriv07_070.CHKSUM
alpdriv07_070.CVRLET_TXT
alpdriv07_070.a-dcx_axpexe

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