Red Hat Bugzilla – Bug 169477
SMP Kernel causes CPU process increase and system unresponsive
Last modified: 2015-01-04 17:22:19 EST
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20050922 Fedora/1.0.7-1.1.fc4 Firefox/1.0.7 Description of problem: Running Either Kernel with SMP above causes system to slow considerably a few minutes after login. This a Dual Pentium 3 machine ( 1.13 Ghz ), adaptec scsi interface, 512 MB memory and dual NIC interfaces. This is an FC4 release with KDE 3.4 desktop installed and is a new installation. System works fine with non SMP kernal and see no performance issues. Once running the SMP Kernel CPU usage climbs for a particular application. It is not unigue to a particular application that is started. After a few minutes of using the system CPU usage increases to 14, 15, 18 and so on for that application. You can not kill the process, tried with kill, kill -9. May be able to kill window with xkill but process remains. Further problems mount as the KDE desktop functionality deteriorates with icons and menus not respondind. Unable to log out from session and power down without turning power off from power switch. Kernel 2.6.12-1.1456 SMP seemed to last a little longer before this occurred but only by a few minutes. Version-Release number of selected component (if applicable): kernel 2.6.11-1.1369 SMP and kernel 2.6.12-1.1456 SMP How reproducible: Always Steps to Reproduce: 1.Boot with SMP kernel and log into KDE desktop and use for a few minutes. 2. 3. Actual Results: See above. Additional info: This problem clearly seems related to Using the SMP kernels. I could not narrow the issue to any particular application. System would boot up normally and pass startup procedures fine. Installation went smoothly and as mentioned above the non SMP kernel seems to work ok.
Mass update to all FC4 bugs: An update has been released (2.6.13-1.1526_FC4) which rebases to a new upstream kernel (2.6.13.2). As there were ~3500 changes upstream between this and the previous kernel, it's possible your bug has been fixed already. Please retest with this update, and update this bug if necessary. Thanks.
2.6.14-1.1637_FC4 has been released as an update for FC4. Please retest with this update, as a large amount of code has been changed in this release, which may have fixed your problem. Thank you.
This is a mass-update to all currently open kernel bugs. A new kernel update has been released (Version: 2.6.15-1.1830_FC4) based upon a new upstream kernel release. Please retest against this new kernel, as a large number of patches go into each upstream release, possibly including changes that may address this problem. This bug has been placed in NEEDINFO_REPORTER state. Due to the large volume of inactive bugs in bugzilla, if this bug is still in this state in two weeks time, it will be closed. Should this bug still be relevant after this period, the reporter can reopen the bug at any time. Any other users on the Cc: list of this bug can request that the bug be reopened by adding a comment to the bug. If this bug is a problem preventing you from installing the release this version is filed against, please see bug 169613. Thank you.
Closing per previous comment.