Add TSAN annotations to pool_scalable

[igchor]

To fix false positives from TSAN.

Found by @kswiecicki. Can you verify that this fixes the issue?

[kswiecicki]

To fix false positives from TSAN.

Found by @kswiecicki. Can you verify that this fixes the issue?

It does fix the issue in tbb_calloc. Wouldn't it be a good idea to also add those annotations in other tbb callbacks that acquire or release memory?

[igchor]

To fix false positives from TSAN.
Found by @kswiecicki. Can you verify that this fixes the issue?

It does fix the issue in tbb_calloc. Wouldn't it be a good idea to also add those annotations in other tbb callbacks that acquire or release memory?

Good point, done. Note that I switched from calling acquire/release on 'ptr' to calling them on 'pool'. The reason is that it's possible for part of the allocation that is freed to be assigned to another thread. In that case, the 'ptr' will be different but the writes will still overlap.