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core: add support for setting CPUAffinity= to special "numa" value

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systemd will automatically derive CPU affinity mask from NUMA node
mask.

Fixes #13248
This commit is contained in:
Michal Sekletár
2020-03-16 08:57:28 +01:00
parent 1808f76870
commit e2b2fb7f56
9 changed files with 125 additions and 13 deletions
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man/systemd.exec.xml
+5 -4
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@@ -774,10 +774,11 @@ CapabilityBoundingSet=~CAP_B CAP_C</programlisting>
<term><varname>CPUAffinity=</varname></term>
<listitem><para>Controls the CPU affinity of the executed processes. Takes a list of CPU indices or ranges
separated by either whitespace or commas. CPU ranges are specified by the lower and upper CPU indices separated
by a dash. This option may be specified more than once, in which case the specified CPU affinity masks are
merged. If the empty string is assigned, the mask is reset, all assignments prior to this will have no
effect. See
separated by either whitespace or commas. Alternatively, takes a special "numa" value in which case systemd
automatically derives allowed CPU range based on the value of <varname>NUMAMask=</varname> option. CPU ranges
are specified by the lower and upper CPU indices separated by a dash. This option may be specified more than
once, in which case the specified CPU affinity masks are merged. If the empty string is assigned, the mask
is reset, all assignments prior to this will have no effect. See
<citerefentry><refentrytitle>sched_setaffinity</refentrytitle><manvolnum>2</manvolnum></citerefentry> for
details.</para></listitem>
</varlistentry>