RFR: 8170355 - [BACKOUT] 8k class metaspace chunks misallocated from 4k chunk freelist

Thomas Stüfe thomas.stuefe at gmail.com
Wed Dec 14 07:38:30 UTC 2016


Never mind, I am not yet awake it seems :)

I see now there was a REDO right after the backout, so my question is
pointless.

Kind Regards, Thomas

On Wed, Dec 14, 2016 at 8:20 AM, Thomas Stüfe <thomas.stuefe at gmail.com>
wrote:

> Hi Stefan,
>
>
>
> On Fri, Nov 25, 2016 at 4:58 PM, Stefan Karlsson <
> stefan.karlsson at oracle.com> wrote:
>
>> Hi Jesper,
>>
>> On 2016-11-25 16:18, Jesper Wilhelmsson wrote:
>>
>>> Hi,
>>>
>>> Please review this backout of JDK-8169931 that is causing problems in
>>> the nightlies that has proven difficult to fix.
>>>
>>
>> The assert introduced in JDK-8169931 found a similar bug but this time in
>> the metaspace initialization code. Using command line flags, there are ways
>> to request a non-humongous chunk size (smaller than the Medium chunk size)
>> that doesn't match any of the fixed chunk sizes.
>>
>>
> I am currently working on a metaspace change and use your non-static
> ChunkManager->list_index() a lot. I see that this backout has not yet found
> its way into the repo, but that will happen shortly I guess.
>
> The change looked reasonable, I am curious which issues exactly were you
> guys encountered in the nightly tests?
>
> Thanks, Thomas
>
>
>>
>>> Bug: https://bugs.openjdk.java.net/browse/JDK-8170355
>>> Webrev: http://cr.openjdk.java.net/~jwilhelm/8170355/webrev.00/
>>>
>>
>> The backout looks good.
>>
>> Thanks,
>> StefanK
>>
>>
>>> Thanks,
>>> /Jesper
>>>
>>
>
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