On Thu, Nov 5, 2026 at 6:25 PM Xuneng Zhou <[email protected]> wrote: > I could > write a follow-up patch or review it if you already did.
I tried to write a patch that keeps postmaster-local copies of the io_uring descriptors and passes them to io_uring_queue_exit() for cleanup. Attached. Per [1], io_uring_queue_exit() seems to use sq.kring_entries. Since this is a pointer [2], simply copying the descriptor would leave it pointing into shared memory. So, the patch also saves the pointed-to value locally. But, I'm not sure this is the right approach... It relies on liburing's implementation rather than a documented guarantee, so future liburing changes would be really easily able to break it. This seems very fragile. Thought? Is there a better approach? Regards, [1] https://github.com/axboe/liburing/blob/liburing-2.7/src/setup.c#L430-L445 [2] https://github.com/axboe/liburing/blob/liburing-2.7/src/include/liburing.h#L77-L83 -- Fujii Masao
v1-0001-Use-postmaster-local-metadata-for-io_uring-cleanu.patch
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