RFR: 8202082: Remove explicit CMS checks in CardTableBarrierSetAssembler

[Erik Österlund]

Hi Aleksey,

Thanks for the review.

/Erik

On 2018-04-23 12:01, Aleksey Shipilev wrote:
> On 04/23/2018 12:00 PM, Erik Österlund wrote:
>> You are right, the previous code has been inconsistent. Sometimes it checked just for CMS, and
>> sometimes CMS + pre-cleaning. The actual property we are looking for is whether the card table is
>> scanned concurrently or not (which I want to determine at a single place instead of all over the
>> place). And for CMS, this is only when pre-cleaning is enabled. The callsites that only checked for
>> CMS (and not CMS + pre-cleaning) are fencing despite there being no actual race to protect against.
> Yup, that's what I wanted to be confirmed.
>
> Looks good.
>
> -Aleksey
>