On Thu, Apr 16, 2026 at 2:17 AM Chao Li <[email protected]> wrote: > I checked the code of dsm_create(), and I did not see anything showing that > the created shared-memory segment is zeroed. > > This is actually just an eyeball finding. From my tracing on my MacBook, > after shared = (DecodingWorkerShared *) dsm_segment_address(seg);, the memory > always seemed to be zeroed, so I may have missed something. But given that > the code explicitly initializes several other fields, it seems better not to > rely on that implicitly.
For the record, that depends on whether you get a newly allocated shared memory segment from the operating system, or recycled shared memory reserved at startup with the min_dynamic_shared_memory setting (as shown in Alexander Lakhin's reproducer).
