Re: IO in wrong state on riscv64

Hi,

On 2025-11-07 19:03:46 -0500, Tom Lane wrote:
> Thomas Munro <thomas.munro@gmail.com> writes:
> > Alexander did some extensive testing and we stared at the codegen on a
> > lot of architectures to confirm that this prevents the reordering.
> > Pushed and back-patched like that.
> 
> You're a brave man to be pushing this into the last-ever release
> of v13 with all of 12 hours remaining till code freeze.  I don't
> mind so much for the newer branches, but I'm feeling nervous
> about the risk/reward ratio for v13.

The patch doesn't do anything complicated, it just adds a compiler barrier to
the read/write barriers. As both the compiler barrier and read/write barrier
code is old I don't see a whole lot of potential for problems here. If this
were changing inline assembly or such, it'd be a different story...

Greetings,

Andres Freund