[10] RFR (M/L): 8137099: G1 needs to "upgrade" GC within the safepoint if it can't allocate during that safepoint to avoid OoME

Stefan Johansson stefan.johansson at oracle.com
Wed Jan 10 09:04:02 UTC 2018

On 2018-01-09 10:54, Thomas Schatzl wrote:
> Hi again,
> On Tue, 2018-01-09 at 10:52 +0100, Thomas Schatzl wrote:
>> Hi all,
>>    Erik Duveblad had some offline comments:
>> New webrevs:
>> http://cr.openjdk.java.net/~tschatzl/8137099/webrev.2_to_3/ (diff)
>> http://cr.openjdk.java.net/~tschatzl/8137099/webrev.3/ (full)
>> - inverting some conditions in the clauses to read better
>> - extract out the condition to do the maximally compacting full gc
>> added in this change into a separate method.
>> Erik Duveblad also noted that this change contains some slight
>> behavioral change in when a collection is started. I.e. previously
>> TLAB allocation by itself could not cause a GC. Since this change is
>> already quite big, he suggested to fix this in a follow-up, and push
>> them together.
>    additionally we agreed to retarget both changes to 11 to let it bake
> a bit.
The latest changes looks good and I agree that doing this early in 11 is 

> Thanks,
>    Thomas

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