| From: | Andrey Rachitskiy <pl0h0yp1(at)gmail(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | exclusion(at)gmail(dot)com, pgsql-bugs(at)lists(dot)postgresql(dot)org |
| Subject: | Re: BUG #19796: io_uring crashes with specific kernel/liburing versions + io_max_concurrency due to rings overlap |
| Date: | 2026-10-26 17:14:02 |
| Message-ID: | CAB8bMiuUxkAUz-uBr=-jMdsU37YfH4mFkWsGLTionJTEgn3fkw@mail.gmail.com |
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| Lists: | pgsql-bugs |
пн, 26 окт. 2026 г. в 18:31, Andres Freund <andres(at)anarazel(dot)de>:
> we could just add 64bytes to the ring sizes for those versions.
v1 built the end of the ring itself from cq_off and the SQ index array, and
increased the reservation only when that end was longer than liburing's
answer.
In v2 on liburing older than 2.7, adds 64 bytes to the answer and rounds up
to a page - the code came out more compact.
Tested 2.5/2.6/2.7 - all good.
I've taken your remarks about the LLM for the future.
| Attachment | Content-Type | Size |
|---|---|---|
| v2-0001-Reserve-one-extra-page-for-packed-io_uring-rings.patch | text/x-patch | 4.2 KB |
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