Bug 861621 - RHEL5.9 guest boot/reboot failed when there is heavy stress on RHEL5.9 host
RHEL5.9 guest boot/reboot failed when there is heavy stress on RHEL5.9 host
Status: CLOSED WONTFIX
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kvm (Show other bugs)
5.9
Unspecified Unspecified
medium Severity medium
: rc
: ---
Assigned To: Virtualization Maintenance
Virtualization Bugs
:
Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2012-09-29 10:40 EDT by Shaolong Hu
Modified: 2012-10-17 22:15 EDT (History)
6 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Environment:
Last Closed: 2012-09-29 16:16:16 EDT
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


Attachments (Terms of Use)
339 kernel guest booting failed when there is high stress on host (16.18 KB, image/png)
2012-09-29 10:40 EDT, Shaolong Hu
no flags Details
308 kernel guest reboot failed when there is high stress on host after running for a whole night (23.72 KB, image/png)
2012-09-29 10:42 EDT, Shaolong Hu
no flags Details

  None (edit)
Description Shaolong Hu 2012-09-29 10:40:11 EDT
Created attachment 619082 [details]
339 kernel guest booting failed when there is high stress on host

Description of problem:
------------------------
Add heavy stress on RHEL5.9 host, RHEL5.9 guest failed to boot/reboot.


Version-Release number of selected component (if applicable):
--------------------------------------------------------------
kernel-2.6.18-339.el5


How reproducible:
------------------
100%


Steps to Reproduce:
---------------------
1. add stress on rhel5.9 host:
stress --cpu 8 --io 4 --vm 2 --vm-bytes 128M

2. boot a rhel5.9 guest
3. guest gets stuck at booting, see screen shot in attachment
4. after stopping stress, guest still can not boot


Additional info:
-----------------
I once met guest reboots failed at rebooting when there is heavy stress with kernel 308 in guest, step to reproduce:

1. add stress on rhel5.9 host
2. boot this guest with 308 kernel, guest boots correctly
3. wait for a whole night, reboot the guest
4. guest get stuck at rebooting
5. screen shot is in attachment.

For when there is stress guest cannot boot with 339 kernel, i am not sure this is the same with 339.
Comment 1 Shaolong Hu 2012-09-29 10:42:38 EDT
Created attachment 619101 [details]
308 kernel guest reboot failed when there is high stress on host after running for a whole night
Comment 2 Ronen Hod 2012-09-29 16:16:16 EDT
Unfortunately, RHEL5 is not as good as RHEL6 with high load, and KVM suffers from this too. We closed several such bugs, and closing this one too.

Thanks, Ronen.
Comment 3 Shaolong Hu 2012-10-17 22:15:45 EDT
Just a FYI, test suggest this situation exists in latest 5.8.z, so this is not regression.

Test with:

2.6.18-308.14.1.el5
kvm-83-249.el5_8.5

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