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Re: VM corruption on standby

Kirill Reshke <reshkekirill@gmail.com>

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From: Kirill Reshke <reshkekirill@gmail.com>
To: Yura Sokolov <y.sokolov@postgrespro.ru>
Cc: Thomas Munro <thomas.munro@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, Andrey Borodin <x4mmm@yandex-team.ru>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Melanie Plageman <melanieplageman@gmail.com>
Date: 2025-08-19T17:07:06Z
Lists: pgsql-hackers 
On Tue, 19 Aug 2025 at 21:16, Yura Sokolov <y.sokolov@postgrespro.ru> wrote:
>

>
> `if (CritSectionCount != 0) _exit(2) else proc_exit(1)` in
> WaitEventSetWaitBlock () solves the issue of inconsistency IF POSTMASTER IS
> SIGKILLED, and doesn't lead to any problem, if postmaster is not SIGKILL-ed
> (since postmaster will SIGKILL its children).
>

This fix was proposed in this thread. It fixes inconsistency but it
replaces one set of problems
with another set, namely systems that fail to shut down.



-- 
Best regards,
Kirill Reshke

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Revert "Get rid of WALBufMappingLock"

  2. Get rid of WALBufMappingLock

  3. Split WaitEventSet functions to separate source file

  4. Add WL_EXIT_ON_PM_DEATH pseudo-event.