[7u80] RFR (backport): 8026303: CMS: JVM intermittently crashes with "FreeList of size 258 violates Conservation Principle" assert

Jesper Wilhelmsson jesper.wilhelmsson at oracle.com
Wed Oct 8 13:13:20 UTC 2014


Looks good.
/Jesper

Stefan Johansson skrev 8/10/14 10:55:
> Adding hotspot-gc-dev.
>
> On 2014-10-07 15:31, Stefan Johansson wrote:
>> Hi,
>>
>> Please review this backport to 7u-dev for:
>> https://bugs.openjdk.java.net/browse/JDK-8026303
>>
>> Full webrev:
>> http://cr.openjdk.java.net/~sjohanss/8026303/webrev.00/
>>
>> Webrev for changes to original fix:
>> http://cr.openjdk.java.net/~sjohanss/8026303/webrev.changeset/
>>
>> Summary:
>> Backporting the fix for 8026303 will solve JDK-8055730, but the changeset 
>> doesn't apply clean to 7u-dev because of some refactoring and name changes. 
>> In 8 & 9 the method "dict_census_update" was misspelled (dict_census_udpate) 
>> and we didn't have an AdaptiveFreeList<FreeChunk> but instead used 
>> FreeList<FreeChunk>. Changing these name conflicts to the original changeset 
>> makes it apply clean and I have verified that the bug we want to fix goes 
>> away after applying it.
>>
>> Some more information is available below in the original Request for approval 
>> mail I sent out.
>>
>> Thank,
>> Stefan
>>
>> On 2014-09-30 14:51, Stefan Johansson wrote:
>>> Hi,
>>>
>>> Please approve the backport of the fix for JDK-8026303 to jdk7u-dev. This 
>>> fix resolves the issue reported in JDK-8055730:
>>> https://bugs.openjdk.java.net/browse/JDK-8055730
>>>
>>> The changeset applies without any conflicts after the changeset has been 
>>> modified to match JDK-7 source. Two main changes was done to the changeset, 
>>> see this webrev for details:
>>> http://cr.openjdk.java.net/~sjohanss/8026303/webrev.changeset/
>>>
>>> Full webrev:
>>> http://cr.openjdk.java.net/~sjohanss/8026303/webrev.00/
>>>
>>> Original bug:
>>> https://bugs.openjdk.java.net/browse/JDK-8026303
>>> Original webrev:
>>> http://cr.openjdk.java.net/~jmasa/8026303/webrev.00/
>>> Original changeset:
>>> http://hg.openjdk.java.net/jdk9/hs-gc/hotspot/rev/0ade41b2dbeb
>>> Review:
>>> http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2013-November/008976.html
>>>
>>> Thanks,
>>> Stefan
>>>
>>>
>>>
>>
>



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