Alexey Goncharuk commented on IGNITE-12412:

[~akalashnikov] [~irakov] folks, I appreciate if you review this change as it 
introduces some refactoring to {{PageMemoryImpl}}

> Incomplete check for ABA problem in PageMemoryImpl#PagePool
> -----------------------------------------------------------
>                 Key: IGNITE-12412
>                 URL: https://issues.apache.org/jira/browse/IGNITE-12412
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Alexey Goncharuk
>            Assignee: Alexey Goncharuk
>            Priority: Critical
>          Time Spent: 10m
>  Remaining Estimate: 0h
> In current implementation, {{PagePool#releasePage}} clears the counter part 
> of the returned page ID, which effectively disables the ABA check intended in 
> the class. This issue can be rarely reproduced on zOS during checkpoints 
> (when pages are being taken and returned to the checkpoint pages pool).
> I managed to write a unit-test to reproduce this issue on x86.

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