Re: [Bug Report + Patch] File descriptor leak when io_method=io_uring

Hi,

Thanks for the report! I can reproduce this bug on master and your patch fixes it.

> I've attached a patch which registers an on_shmem_exit() callback
> to close the file descriptors on server exit. I took inspiration
> from how src/backend/storage/aio/method_worker.c handles cleanup.

I also verify that only the postmaster will call this callback because all children
of the postmaster will reset postmaster's callback.

My another thought is that add a shmem_cleanup callback to IoMethodOps and
do cleanup in this callback. Not sure which is better.

--
Regards,
ChangAo Chen