Bug 1367502
| Summary: | tuned realtime profiles need rcu_nocbs | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Marcel Kolaja <mkolaja> |
| Component: | tuned | Assignee: | Jaroslav Škarvada <jskarvad> |
| Status: | CLOSED ERRATA | QA Contact: | Tereza Cerna <tcerna> |
| Severity: | urgent | Docs Contact: | |
| Priority: | urgent | ||
| Version: | 7.2 | CC: | atheurer, daolivei, hhuang, jeder, jscotka, jskarvad, juzhang, ksundara, lcapitulino, mnavrati, pezhang, sgordon, skramaja, smazziot, snagar, tcerna, thozza, xfu |
| Target Milestone: | rc | Keywords: | ZStream |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | tuned-2.5.1-4.el7_2.5 | Doc Type: | Bug Fix |
| Doc Text: |
Previously, with the realtime-virtual-host and realtime-virtual-guest tuned profiles, the rcu_nocbs kernel parameter was missing from the /proc/cmdline file. With this update, rcu-nocbs is included as expected.
|
Story Points: | --- |
| Clone Of: | 1334479 | Environment: | |
| Last Closed: | 2016-09-15 08:00:34 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: | |||
| Bug Depends On: | 1334479 | ||
| Bug Blocks: | |||
|
Description
Marcel Kolaja
2016-08-16 14:34:28 UTC
=============================================
Verified in:
tuned-2.5.1-4.el7_2.5.noarch
tuned-profiles-nfv-2.5.1-4.el7_2.5.noarch
PASS
=============================================
# cat /usr/lib/tuned/realtime-virtual-host/tuned.conf | grep cmdline
cmdline=isolcpus=${isolated_cores} nohz=on nohz_full=${isolated_cores} rcu_nocbs=${isolated_cores} intel_pstate=disable nosoftlockup
# cat /etc/tuned/realtime-virtual-host-variables.conf
isolated_cores=1
# tuned-adm profile realtime-virtual-host
# reboot
# cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-3.10.0-493.el7.x86_64 root=/dev/mapper/rhel_dell--pe--fm120--2c-root ro crashkernel=auto rd.lvm.lv=rhel_dell-pe-fm120-2c/root rd.lvm.lv=rhel_dell-pe-fm120-2c/swap console=ttyS0,115200n81 isolcpus=1 nohz=on nohz_full=1 rcu_nocbs=1 intel_pstate=disable nosoftlockup
The same behavior is also for realtime-virtual-guest.
=============================================
Reproduced in:
tuned-2.5.1-7.el7.noarch
tuned-profiles-nfv-2.5.1-7.el7.noarch
FAIL
=============================================
# cat /usr/lib/tuned/realtime-virtual-host/tuned.conf | grep cmdline
cmdline=isolcpus=${isolated_cores} nohz=on nohz_full=${isolated_cores} intel_pstate=disable nosoftlockup
# cat /etc/tuned/realtime-virtual-host-variables.conf
isolated_cores=1
# tuned-adm profile realtime-virtual-host
# reboot
# cat /proc/cmdline
# cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-3.10.0-493.el7.x86_64 root=/dev/mapper/rhel_dell--pe--fm120--2c-root ro crashkernel=auto rd.lvm.lv=rhel_dell-pe-fm120-2c/root rd.lvm.lv=rhel_dell-pe-fm120-2c/swap console=ttyS0,115200n81 isolcpus=1 nohz=on nohz_full=1 intel_pstate=disable nosoftlockup
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2016-1848.html |