RFR: 8241081: Shenandoah: Do not modify update-watermark concurrently

[Aleksey Shipilev]

On 3/17/20 12:33 PM, Roman Kennke wrote:
>>> Webrev:
>>> http://cr.openjdk.java.net/~rkennke/JDK-8241081/webrev.02/
>>
>> Looks good.
>>
>> One tiny thing: can you please read _update_watermark into local field, assert that value and return
>> the same one? Instead of doing effectively three memory accesses, which might disagree.
> 
> Ok like this?
> 
> http://cr.openjdk.java.net/~rkennke/JDK-8241081/webrev.03/

Yes.

-- 
Thanks,
-Aleksey