Bug 807414 - kdump test fails after switchting to summer time / daylight saving time
kdump test fails after switchting to summer time / daylight saving time
Product: Red Hat Hardware Certification Program
Classification: Red Hat
Component: Test Suite (tests) (Show other bugs)
All Linux
unspecified Severity low
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Assigned To: Caspar Zhang
Red Hat Kernel QE team
Depends On:
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Reported: 2012-03-27 13:45 EDT by Rainer Koenig
Modified: 2013-07-03 03:37 EDT (History)
4 users (show)

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Last Closed: 2012-10-17 13:18:09 EDT
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Description Rainer Koenig 2012-03-27 13:45:33 EDT
Description of problem:
Germany switched to summer time (CEST) last weekend. Last week I performed 32-bit kdump tests on a test system and they passed. Today I performed the same tests with 64-bit and I failed. 

Version-Release number of selected component (if applicable):
Actual version of v7 testsuite

How reproducible:

Steps to Reproduce:
1. Install RHEL 6.2
2. Set HW clock to UTC and time zone to Europe/Berlin
3. Perform local kdump test
Actual results:
The test fails. The logs say, that no crashdump in a good time window could be found in /var/crash. 

Expected results:
kdump should work, regardless of the time and timezone settings.

Additional info:
Looking into /var/crash shows that the crashdump file is always 1 hour advanced to the real time.

Meanwhile I managed to pass the test with the following time settings:
- System clock is running on UTC
- System time zone is GMT-1h.

Looks like the change to summertime was messing things up. ;-)
Comment 1 Caspar Zhang 2012-07-18 03:44:23 EDT
Hi Rainer, is this still an issue? IIRC, the problem should no longer exist several hours later after switched to summer time.
Comment 2 Rob Landry 2012-08-06 15:07:38 EDT
Hrm,  I'm pretty certain nothing in v7 is daylight aware.  But it's worth confirming the issue does self resolve after a few hours or is there a period of time (days weeks months) where the various time zones being at different offsets continues to effect the test?

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