RFR(S): 8229422: Taskqueue: Outdated selection of weak memory model platforms

Andrew Haley aph at redhat.com
Wed Jan 22 17:47:35 UTC 2020


On 1/22/20 3:01 PM, Doerr, Martin wrote:
> Thread1: set bottom (push)
> Thread2: read age, read bottom, set age (pop_global)
> Thread3: read age, read bottom (pop_global)
> 
> The requirement is that Thread3 must never read an older bottom value than Thread2 after Thread3 has seen the age value from Thread2.

OK, so all we need here is a LoadLoad between read age and read bottom
in pop_global, as David Holmes said.

-- 
Andrew Haley  (he/him)
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
https://keybase.io/andrewhaley
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