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pid1: add new kernel cmdline arg systemd.cpu_affinity=
Let's allow configuration of the CPU affinity via the kernel cmdline, overriding CPUAffinity= in /etc/systemd/system.conf Prompted by: https://lists.freedesktop.org/archives/systemd-devel/2019-November/043754.html
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@ -393,6 +393,17 @@
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>systemd.cpu_affinity=</varname></term>
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<listitem>
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<para>Overrides the CPU affinity mask for the service manager and the default for all child
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processes it forks. This takes precedence over <varname>CPUAffinity=</varname>, see
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<citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for details.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>modules_load=</varname></term>
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<term><varname>rd.modules_load=</varname></term>
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@ -475,6 +475,15 @@ static int parse_proc_cmdline_item(const char *key, const char *value, void *dat
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if (arg_default_timeout_start_usec <= 0)
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arg_default_timeout_start_usec = USEC_INFINITY;
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} else if (proc_cmdline_key_streq(key, "systemd.cpu_affinity")) {
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if (proc_cmdline_value_missing(key, value))
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return 0;
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r = parse_cpu_set(value, &arg_cpu_affinity);
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if (r < 0)
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log_warning_errno(r, "Faile to parse CPU affinity mask '%s', ignoring: %m", value);
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} else if (proc_cmdline_key_streq(key, "systemd.watchdog_device")) {
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if (proc_cmdline_value_missing(key, value))
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