| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | pgsql-hackers(at)lists(dot)postgresql(dot)org, Jaime Casanova <jaime(dot)casanova(at)2ndQuadrant(dot)com> |
| Subject: | Re: LogwrtResult contended spinlock |
| Date: | 2021-01-30 01:47:56 |
| Message-ID: | 20210130014756.GA9923@alvherre.pgsql |
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| Thread: | |
| Lists: | pgsql-hackers |
So I tried this, but -- perhaps not suprisingly -- I can't get it to
work properly; the synchronization fails. I suspect I need some
barriers, but I tried adding a few (probably some that are not really
necessary) and that didn't have the expected effect. Strangely, all
tests work for me, but the pg_upgrade one in particular fails.
(The attached is of course POC quality at best.)
I'll have another look next week.
--
Álvaro Herrera 39°49'30"S 73°17'W
| Attachment | Content-Type | Size |
|---|---|---|
| v2-0001-add-pg_atomic_monotonic_advance_u64.patch | text/x-diff | 1.2 KB |
| v2-0002-atomics-in-xlog.c.patch | text/x-diff | 11.9 KB |
| v2-0003-add-barriers.patch | text/x-diff | 3.5 KB |
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