Method and apparatus for reporting error logs in a logical environment

• US 7,055,071 B2
• Filed: 01/09/2003
• Issued: 05/30/2006
• Est. Priority Date: 01/09/2003
• Status: Active Grant

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: International Business Machines Corporation
• Inventors: Kitamorn, Alongkorn, Willoughby, David R., Oliver, Douglas Wayne, Austen, Christopher Harry
• Primary Examiner(s): Baderman, Scott
• Assistant Examiner(s): ASSESSOR, BRIAN J
• Application Number:
  US10/339,770
• Publication Number:
  US 20040139368A1
• Time in Patent Office: 1,237 Days
• Field of Search: 714/20, 714/48
• US Class Current: 714/48
• CPC Class Codes: G06F 11/0712 in a virtual computing platform, e.g. logically partitioned systems
• CPC Class Codes: G06F 11/0781 Error filtering or prioritizing based on a policy defined by the user or on a policy defined by a hardware/software module, e.g. according to a severity level

Abstract

A method, apparatus, and computer instructions for managing error logs. A request is received from a partition within a plurality of partitions in the logical partitioned data processing system to access error information. A determination is made as to whether the error information is located in a buffer. The error information is retrieved from a non-volatile memory in response to the error information being absent in the buffer. The retrieved error information retrieved from the non-volatile memory is stored in the buffer. This error information is stored in the buffer only for a selected period of time. After that period of time, this error information is deleted or removed from the buffer. In this manner, outdated error information is not returned to the plurality of partitions.

Claims

1. A method in a logical partitioned data processing system for managing an error log, the method comprising:

receiving a request from a partition within a plurality of partitions in the logical partitioned data processing system to access error information;

determining whether the error information is located in a buffer;

responsive to the error information being absent in the buffer, retrieving the error information from a non-volatile memory;

assigning a selected period of time to the retrieved error information, wherein the selected period of time indicates when error information has expired; and

storing the relieved error information retrieved from the non-volatile memory in the buffer only for the selected period of time, wherein error information is deleted from the buffer after the selected period of time has passed.

2. The method of claim 1 further comprising:

sending the retrieved error information to the partition from the buffer.

3. The method of claim 1, wherein the retrieved error information is located in a data structure.

4. The method of claim 3, wherein the data structure is an error log.

5. The method of claim 1, wherein the non-volatile memory is a non-volatile random access memory.

6. The method of claim 1, wherein the error information is assigned an expiration time period.

7. The method of claim 1 further comprising:

removing the retrieved error information from the buffer after the selected period of time has passed, wherein the plurality of partitions are unable to obtain outdated error information.

8. The method of claim 1, wherein the buffer is at least one of a random access memory, a tape drive, and a hard disk drive.

9. The method of claim 1, wherein the steps of receiving, determining, retrieving, and storing are performed by a partition management firmware.

10. A method in a logical partitioned data processing system for managing error logs, the method comprising:

responsive to receiving a request for error information from a partition within a plurality of partitions in the logical partitioned data processing system, determining whether an error log is present in a buffer memory;

responsive to an absence of the error log in the buffer memory, retrieving the error log from a non-volatile memory containing a set of error logs if the error log is unreported;

assigning a selected period of time to the retrieved error log, wherein the selected period of time indicates when the error log has expired;

storing the error log retrieved from the non-volatile memory in the buffer memory, wherein the error log is stored in the buffer only for the selected period of time, wherein error information is deleted from the buffer after the selected period of time has passed; and

returning the error information to the partition using the error log stored in the buffer memory.

11. The method of claim 10 further comprising:

deleting the error log from the buffer memory after the selected period of time.

12. The method of claim 11, wherein the selected period of time is identified using a time stamp associated with the error log.

13. The method of claim 10, wherein the error log is selected from the plurality of error logs as being an oldest non-reported error log.

14. The method of claim 10, wherein the steps of receiving, retrieving, storing, and returning are performed by a partition management firmware.

15. A logical partitioned data processing system for managing an error log, the logical partitioned data processing system comprising:

a bus system;

a communications unit connected to the bus system;

a memory connected to the bus system, wherein the memory includes a set of instructions; and

a processing unit connected to the bus system, wherein the processing unit executes the act of instructions to receive a request from a partition within a plurality of partitions in the logical partitioned data processing system to access error information;

determine whether the error information is located in a buffer, retrieve the error information from a non-volatile memory in response to the error information being absent in the buffer;

assigning a selected period of time to the retrieved error information, wherein the selected period of time indicates when the error information has expired; and

store the retrieved error information retrieved from the non-volatile memory in the buffer in which the retrieved error information is stored in the buffer only for a selected period of time, wherein error information is deleted from the buffer after the selected period of time has passed.

16. A logical partitioned data processing system for managing error logs, the logical partitioned data processing system comprising:

a bus system;

a communications unit connected to the bus system;

a memory connected to the bus system, wherein the memory includes a set of instructions; and

a processing unit connected to the bus system, wherein the processing unit executes the set of instructions to determine whether an error log is present in a buffer memory in response to receiving a request for error information from a partition within a plurality of partitions in the logical partitioned data processing system;

retrieve the error log from a non-volatile memory containing a set of error logs if the error log is unreported in response to an absence of the error log in the buffer memory;

assigning a selected period of time to the retrieved error information, wherein the selected period of time indicates when the error information has expired;

store the error log retrieved from the non-volatile memory in the buffer memory in which the error log is stored in the buffer only for the selected period of time, wherein error information is deleted from the buffer after the selected period of time has passed; and

return the error information to the partition using the error log stored in the buffer memory.

17. A logical partitioned data processing system for managing an error log, the logical partitioned data processing system comprising:

receiving means for receiving a request from a partition within a plurality of partitions in the logical partitioned data processing system to access error information;

determining means for determining whether the error information is located in a buffer;

retrieving means, responsive to the error information being absent in the buffer, for retrieving the error information from a non-volatile memory;

assigning means for assigning a selected period of time to the retrieved error information, wherein the selected period of time indicates when the error information has expired; and

storing means for storing the retrieved error information retrieved from the non-volatile memory in the buffer only for the selected period of time, wherein error information is deleted from the buffer after the selected period of time has passed.

18. The data processing system of claim 17 further comprising:

sending means for sending the retrieved error information to the partition from the buffer.

19. The data processing system of claim 17, wherein the retrieved error information is located in a data structure.

20. The data processing system of claim 19, wherein the data structure is an error log.

21. The data processing system of claim 17, wherein the non-volatile memory is a non-volatile random access memory.

22. The data processing system of claim 17, wherein the error information is assigned an expiration time period.

23. The data processing system of claim 17 further comprising:

removing means for removing the retrieved error information from the buffer after the selected period of time has passed, wherein the plurality of partitions are unable to obtain outdated error information.

24. The data processing system of claim 17, wherein the buffer is at least one of a random access memory, a tape drive, and a hard disk drive.

25. The data processing system of claim 17, wherein the receiving means, determining means, retrieving means, and storing means are located in a partition management firmware.

26. A logical partitioned data processing system for managing error logs, the logical partitioned data processing system comprising:

determining means, responsive to receiving a request for error information from a partition within a plurality of partitions in the logical partitioned data processing system, for determining whether an error log is present in a buffer memory;

retrieving means, responsive to an absence of the error log in the buffer memory, for retrieving the error log from a non-volatile memory containing a set of error logs if the error log is unreported;

assigning a selected period of time to the retrieved error information, wherein the selected period of time indicates when error information has expired;

storing means for storing the error log retrieved from the non-volatile memory in the buffer memory for the selected period of time, wherein error information is deleted from the buffer the selected period of time has passed; and

returning means for returning the error information to the partition using the error log stored in the buffer memory.

27. The data processing system of claim 26 further comprising:

deleting moans for deleting the error log from the buffer memory after the selected period of time.

28. The data processing system of claim 27, wherein the selected period of time is identified using a time stamp associated with the error log.

29. The data processing system of claim 26, wherein the error log is selected from the plurality of error logs as being an oldest non-reported error log.

30. The data processing system of claim 26, wherein the receiving means, retrieving means, storing means, and returning means are located in a partition management firmware.

31. A computer program product in a computer readable medium for managing an error log, the computer program product comprising:

first instructions for receiving a request from a partition within a plurality of partitions in the logical partitioned data processing system to access error information;

second instructions for determining whether the error information is located in a buffer;

third instructions, responsive to the error information being absent in the buffer, for retrieving the error information from a non-volatile memory;

fourth instruction means for assigning a selected period of time to the retrieved error information, wherein the selected period of time indicates when error information has expired; and

fifth instructions for storing the retrieved error information retrieved from the non-volatile memory in the buffer, wherein the retrieved error information is stored in the buffer only for a selected period of time, and wherein error information is deleted from the buffer after the selected period of time has passed.

32. A computer program product in a computer readable medium for managing error logs, the computer program product comprising:

first instructions, responsive to receiving a request for error information from a partition within a plurality of partitions in the logical partitioned data processing system, for determining whether an error log is present in a buffer memory;

second instructions, responsive to an absence of the error log in the buffer memory, for retrieving the error log from a non-volatile memory containing a set of error logs if the error log is unreported;

third instructions for assigning a selected period of time to the retrieved error information, wherein the selected period of time indicates when error information has expired;

fourth instructions for storing the error log retrieved from the non-volatile memory in the buffer memory for the selected period of time, wherein error information is deleted from the buffer after the selected period of time has passed; and

fifth instructions for returning the error information to the partition using the error log stored in the buffer memory.