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SunOS : New Kernel Patch
Sun(sm) Alert Notification
Sun Alert ID: 57504
Synopsis: Solaris 8 Patch 108528-17 Through 108528-29 and Solaris 9 Patch 112233-03 Through 112233-11 May Delay Execution of Real Time and Other High Priority Processes
Category: Availability
Product: Solaris
BugIDs: 4912731
Avoidance: Workaround, Patch
State: Resolved
Date Released: 26-Feb-2004, 23-Apr-2004
Date Closed: 23-Apr-2004
Date Modified: 18-Mar-2004, 23-Apr-2004
1. Impact
Patches shown below in Contributing Factors may delay execution of real time and other high priority processes by a few milliseconds.
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
Solaris 8 with patch 108528-17 through 108528-29 and without patch 117000-01
Solaris 9 with patch 112233-03 through 112233-11 and without patch 112233-12
x86 Platform
Solaris 8 without patch 117001-01
Solaris 9 without patch 112234-12
Note: The described issue only occurs with the execution of real time and other high priority processes. This issue has no effect on the normal functionality of the system.
3. Symptoms
If the described issue occurs, a delay of a few milliseconds may be experienced when real time and high priority processes are executed.
Solution Summary Top
4. Relief/Workaround
To work around the described issue, edit the "/etc/system" file and decrease the number of pages the memory scrubber scans on every call as shown below:
set memscrub_span_pages=4
Note: A system reboot is required for the above change to take affect.
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
Solaris 8 with patch 117000-01 or later
Solaris 9 with patch 112233-12 or later
x86 Platform
Solaris 8 with patch 117001-01 or later
Solaris 9 with patch 112234-12 or later
Change History
18-Mar-2004:
Updated Contributing Factors, Relief/Workaround, and Resolution Sections
23-Apr-2004:
State: Resolved
Updated Contributing Factors and Resolution sections