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| author | Thomas Munro <tmunro@postgresql.org> | 2024-07-30 21:52:46 +1200 |
|---|---|---|
| committer | Thomas Munro <tmunro@postgresql.org> | 2024-07-30 22:58:57 +1200 |
| commit | 81385261362962deb9861b39b509aeffe213721d (patch) | |
| tree | cf15fa763cea6ccbc200c5e60759a3688dfba118 /doc/src | |
| parent | e25626677f8076eb3ce94586136c5464ee154381 (diff) | |
| download | postgresql-81385261362962deb9861b39b509aeffe213721d.tar.gz postgresql-81385261362962deb9861b39b509aeffe213721d.zip | |
Remove --disable-atomics, require 32 bit atomics.
Modern versions of all relevant architectures and tool chains have
atomics support. Since edadeb07, there is no remaining reason to carry
code that simulates atomic flags and uint32 imperfectly with spinlocks.
64 bit atomics are still emulated with spinlocks, if needed, for now.
Any modern compiler capable of implementing C11 <stdatomic.h> must have
the underlying operations we need, though we don't require C11 yet. We
detect certain compilers and architectures, so hypothetical new systems
might need adjustments here.
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> (concept, not the patch)
Reviewed-by: Andres Freund <andres@anarazel.de> (concept, not the patch)
Discussion: https://postgr.es/m/3351991.1697728588%40sss.pgh.pa.us
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/installation.sgml | 25 |
1 files changed, 0 insertions, 25 deletions
diff --git a/doc/src/sgml/installation.sgml b/doc/src/sgml/installation.sgml index 3f19f272b17..4ab8ddba7c1 100644 --- a/doc/src/sgml/installation.sgml +++ b/doc/src/sgml/installation.sgml @@ -1258,18 +1258,6 @@ build-postgresql: </listitem> </varlistentry> - <varlistentry id="configure-option-disable-atomics"> - <term><option>--disable-atomics</option></term> - <listitem> - <para> - Disable use of CPU atomic operations. This option does nothing on - platforms that lack such operations. On platforms that do have - them, this will result in poor performance. This option is only - useful for debugging or making performance comparisons. - </para> - </listitem> - </varlistentry> - </variablelist> </sect3> @@ -2674,19 +2662,6 @@ ninja install </listitem> </varlistentry> - <varlistentry id="configure-atomics-meson"> - <term><option>-Datomics={ true | false }</option></term> - <listitem> - <para> - This option is set to true by default; setting it to false will - disable use of CPU atomic operations. The option does nothing on - platforms that lack such operations. On platforms that do have - them, disabling atomics will result in poor performance. Changing - this option is only useful for debugging or making performance comparisons. - </para> - </listitem> - </varlistentry> - </variablelist> </sect3> |