Bug 159799
Summary: | A lot of stopped processes on a SMP system with HTT enabled | ||
---|---|---|---|
Product: | Red Hat Enterprise Linux 3 | Reporter: | Vlady <vlady> |
Component: | kernel | Assignee: | Don Howard <dhoward> |
Status: | CLOSED CANTFIX | QA Contact: | Brian Brock <bbrock> |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | 3.0 | CC: | petrides |
Target Milestone: | --- | ||
Target Release: | --- | ||
Hardware: | i386 | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Bug Fix | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2005-11-07 21:31:33 UTC | Type: | --- |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Description
Vlady
2005-06-08 08:26:45 UTC
Thanks for your report, Vlady. Could you please specify the exact (most recent) kernel version that exhibits this problem? Also, can you give us an idea of what sort of processes are stopped? And do they go away if they are killed? Vlady - Could you also capture, 'ps -ax', sysrq-t and sysrq-m output from a system that is experiencing this problem? Below is a small part of the ``ps -ax | grep T" command results on a server with 2.4.21-27.0.4.ELsmp kernel and HTT enabled. 26337 ? T 0:00 cut -b 7- 24464 ? T 0:00 sed s/$/<NL>/g 23302 ? T 0:00 /bin/sed s|/|.|g 9958 ? T 0:00 id -u 8551 ? T 0:00 netstat -tln 22400 ? T 0:00 mkdir -p /some/dir 1697 ? T 0:00 netstat -tln 13750 ? T 0:00 /bin/sed s|/dev/|| 20597 ? T 0:00 netstat -tln 25570 ? T 0:00 /bin/sed s|/dev/|| 7115 ? T 0:00 /bin/sh /bin/egrep -q (^|:)/usr/X11R6/bin($|:) 22075 ? T 0:00 id -un 1386 ? T 0:00 /usr/bin/tty 2272 ? T 0:00 sh -c date +%Z 2> /dev/null 21237 ? T 0:00 sh -c sysctl fs.file-max 28206 ? T 0:00 /bin/sh -c /usr/lib/sa/sa2 -A 32587 ? T 0:00 sh -c date +%Z 2> /dev/null 30494 ? T 0:00 sh -c date +%Z 2> /dev/null 4591 ? T 0:00 netstat -tln 9427 ? T 0:00 /bin/sed s|/dev/|| Sorry, but i can't supply you with the results of SysRq*. All our servers which experince "stopped processes" problem are in production and don't want to experiement with their kernels! :( Also, i don't have console access to our servers, so i can't even excute sysreq + t or sysreq + m keyboard secuences. Vlady - You can use sysrq-trigger remotely: # enable sysrq-trigger $ echo 1 > /proc/sys/kernel/sysrq # sysrq-t $ echo t > /proc/sysrq-trigger # sysrq-m $ echo m > /proc/sysrq-trigger The sysrq info is really important - I can't make any suggestions unless I can see where these process are blocking in the kernel. Hi Vlady Were you able to use the sysreq-trigger mechanism I mentioned above? I'll need the sysrq-t & sysrq-m info in order to see what's happening with the stopped processes. For now, I'm going to close this issue. Please re-open it if you are able to collect the info (and are still experiencing the problem). |