On Wed, Apr 13, 2016 at 11:18 AM, Andres Freund <and...@anarazel.de> wrote: > I think generally the only platform of concern wrt is arm (< armv8), > which doesn't have 64bit atomicity and doesn't have > single-copy-atomicity for 8 byte values either (C.f. > https://wiki.postgresql.org/wiki/Atomics).
That page is sort of confusing, because it says that platform has those things but then says ***, which is footnoted to mean "linux kernel emulation available", but it's not too clear whether that applies to all atomics or just 8-byte atomics. The operator precedence of / (used as a separator) vs. footnotes is not stated. It's also not clear what "linux kernel emulation available" actually means. Should we think of those things being fast, or slow? At any rate, I do actually have a Raspberry Pi 2 here so if we ever commit a patch that might suck without real 64-bit atomics we might be able to actuall test whether it does or not. But as you say, no such patch is being proposed at the moment. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
