Just one more minor thing. While working on making CLOG 64-bit, I noticed that read error messages from SLRU pages were reported only in 32-bit format, with the upper half simply truncated. Here's a small patch to fix this problem. I used the "%u:%u" format because it is already used by Postgres for outputting 64-bit transactions.
-- Best regards, Maxim Orlov.
v1-0001-Make-SlruReportIOError-accept-64-bit-values.patch
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