Red Hat Bugzilla – Full Text Bug Listing
|Product:||[Fedora] Fedora||Reporter:||Bevis King <B.King>|
|Component:||nfs-utils||Assignee:||John Dennis <jdennis>|
|Status:||CLOSED WONTFIX||QA Contact:||Fedora Extras Quality Assurance <extras-qa>|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2009-01-09 01:37:40 EST||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
Description Bevis King 2008-06-22 17:18:17 EDT
Description of problem: Just updated to the latest kernel and packages - sealert recommended placing a file called /.autorelabel in the root directory - did this and rebooted with the new kernel. System has been up 1 hr 19 mins - sealert has already clocked up 26 CPU minutes, setroubleshootd has clocked up around 1 min 50 seconds. System performance is appallingly slow - load average is 8.23; normal for this system is around 0.20 maximum. Selinux status is set to permissive; system is a Athlon 64 box with 2GB RAM, ~ 2TB of software RAID disc; low traffic Oracle 10i database, web server and nfs server loads. NFS mounts are taking 30-60 seconds per mount to (successfully) mount from the 3 served clients. Please advise on how to reduce the impact. Version-Release number of selected component (if applicable): Kernel 126.96.36.199-27.fc8 All updates latest as at 22nd Jun 2008. How reproducible: All the time. Steps to Reproduce: Attempt basic DB, NFS and Web operations on a lightly loaded server with selinux status set to permissive. Actual results: Heavily loaded system; unmanageable number of file attribute errors despite relabeling, appalling NFS mount lead-time. Expected results: Normal operation - quick mounts, etc. Additional info:
Comment 1 John Dennis 2008-06-23 10:55:35 EDT
What is the version of setroubleshoot? Versions less than 2.x can produce excessive alerts in some situations.
Comment 2 Bevis King 2008-06-23 11:08:07 EDT
setroubleshoot-2.0.5-2.fc8 Update: the system became totally catatonic within 2 hours and to be rebooted with selinux disabled completely to get any user service back. I do have the massive log files, but doubt I can upload them - they're massive. Is there any kind of grep I can perform on them that will help diagnose what caused this problem. I guess the key observations are: 1. doing the /.autorelabel suggested by sealert definitely made things much worse than it had been. 2. sealert should probably detect just how many errors it's been reporting and drop itself out of the loop after maybe a couple of hundred similar events in quick succession - a "last message repeated 8,000 times" kind of response rather than trying to queue that many notifications which seems likely the way it got to 26 minutes CPU time in 1hr 20m uptime. Hope that helps... Regards, Bevis.
Comment 3 John Dennis 2008-06-23 11:34:32 EDT
You should be fine with this version, I suspect there are other issues going on. setroubleshoot does (or should) aggregate identical alerts into a single alert (incrementing the alert's report count). setroubleshoot should also truncate unique alerts to a maximum of 50. I sounds like you've got a situation where you're constantly getting denials (denials are reported in permissive mode). setroubleshoot still has to run to determine the current denial is identical to a previous denial so even if setroubleshoot is correctly coalescing these into a single alert it is going to consume resources. You have two choices, turn off setroubleshoot (service setroubleshoot stop or chkconfig setroubleshoot off), or better yet fix the problem it's trying to warn you about. Open the sealert browser (Applications-->System Tools-->SELinux Troubleshooter) and look for alerts with high alert counts (or click on the report count column to sort by report count). Then figure out why you're getting that denial so frequently. We can help you here, after you identify the alert with the high count use (Edit-->Copy Alert) to put the alert on the clipboard and paste it into this bugzilla. Re, large log files, you don't specify which log files you're talking about, the audit log file should be large in this instance, but not the setroubleshoot log file (/var/log/setroubleshoot/setroubleshootd.log) unless it's continuously faulting and writing tracebacks into the log file, is it?
Comment 4 Bevis King 2008-07-19 07:21:59 EDT
OK, I think I've tracked down where there problem is. This is actually to do with a memory leak in the NFS mountd code, the rpc.mountd does this about 20,000 times per mount request: ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0 ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0 ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0 ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0 ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0 ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0 ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0 ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0 ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0 ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0 Doing some research this seems to be covered by debian bug: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=413661 and: http://linux-nfs.org/pipermail/nfsv4/2007-July/006339.html The discussions pointed to above seem to indicate that the bug was fixed in e2fsprogs 1.40 and nfs-kernel-server 1.0.12. I'm not sure where that leaves Fedora 8. I can understand that my situation may be extreme as the system has three Linux software RAID devices, each producing a volume group, with a total of about 40 logical volumes defined. Do a device manager rescan and you'll pretty much disappear under the load. Any thoughts on this? Regards, Bevis.
Comment 5 Bug Zapper 2008-11-26 05:54:33 EST
This message is a reminder that Fedora 8 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 8. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '8'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 8's end of life. Bug Reporter: Thank you for reporting this issue and we are sorry that we may not be able to fix it before Fedora 8 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora please change the 'version' of this bug to the applicable version. If you are unable to change the version, please add a comment here and someone will do it for you. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. The process we are following is described here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
Comment 6 Bug Zapper 2009-01-09 01:37:40 EST
Fedora 8 changed to end-of-life (EOL) status on 2009-01-07. Fedora 8 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.