[RFR]: 8187590: Zero runtime can lock-up on linux-alpha

[David Holmes]

I'll add my Review and raise you a Sponsor. :)

Cheers,
David

> Andrew Haley aph at redhat.com
> Mon Sep 18 15:38:08 UTC 2017
> On 15/09/17 22:15, John Paul Adrian Glaubitz wrote:
>> Please review this change [1] which fixes random lockups of the Zero runtime
>> on linux-alpha. This was discovered when building OpenJDK on the Debian
>> automatic package builders for Alpha, particularly on SMP machines.
>> 
>> It was observed that the issue could be fixed by installing a uni-processor
>> kernel. After some testing, we discovered that the proper fix is to use
>> __sync_synchronize() even for light memory barriers.
> 
> That looks right, thanks.
> 
> -- 
> Andrew Haley
> Java Platform Lead Engineer
> Red Hat UK Ltd. <https://www.redhat.com>
> EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671