RFR(s): 8205583: Crash in ConcurrentHashTable do_bulk_delete_locked_for

[Gerard Ziemski]

Looks good.

> On Jun 26, 2018, at 4:28 AM, Robbin Ehn <robbin.ehn at oracle.com> wrote:
> 
> Hi, here is the updated version.
> 
> Full:http://cr.openjdk.java.net/~rehn/8205583/v1/full/webrev/
> Inc: http://cr.openjdk.java.net/~rehn/8205583/v1/inc/webrev/
> 
> /Robbin
> 
> On 06/25/2018 08:26 PM, Robbin Ehn wrote:
>> Hi all, please review.
>> Webrev: http://cr.openjdk.java.net/~rehn/8205583/v0/webrev/index.html
>> Issue: https://bugs.openjdk.java.net/browse/JDK-8205583
>> The problem is that the cancel-able cleaning operation is unaware of rehash.
>> The cleaning starts, pauses for a safepoint which does the rehash, destroying
>> the old table. When the cleaning continues after the safepoint it will continue
>> to do so in the destroyed table.
>> The cancelability of the cleaning operation is not needed and just creates
>> complicity. In this change-set I remove that functionality, which means a rehash
>> will be postponed until the cleaning have finished. (identical as for growing)
>> Passed 700 runs of the test that produced the error and tier 1-3.
>> Thanks, Robbin