On Tue, Oct 14, 2025 at 5:00 PM Alexander Lakhin <[email protected]> wrote:
> The replacements doesn't work for me, unfortunately: I have 3 out of 30
> 027_stream_regress test runs failed:
> 2025-10-13 21:27:26.161 UTC [4181290:5] pg_regress/brin ERROR: IO in wrong
> state: 0
> 2025-10-13 21:27:26.161 UTC [4181290:6] pg_regress/brin STATEMENT: CREATE
> TABLE brintest (byteacol bytea,
I wonder if the problem could be with buf->io_wref. In WaitIO() we do:
iow = buf->io_wref;
UnlockBufHdr(buf, buf_state);
...
pgaio_wref_wait(&iow);
... but UnlockBufHdr() is only concerned with write ordering:
static inline void
UnlockBufHdr(BufferDesc *desc, uint32 buf_state)
{
pg_write_barrier();
pg_atomic_write_u32(&desc->state, buf_state & (~BM_LOCKED));
}
What happens if you insert pg_memory_barrier() after the line that
reads buf->io_wref?
Does this reproduce on REL_18_STABLE?
