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docs: drop invalid links
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@ -99,7 +99,7 @@ The signal with _False_ is generally delivered only after the system comes back
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The signal with _False_ is usually the signal on which applications request a new delay lock in order to be synchronously notified about the next suspend/shutdown cycle.
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Note that watching PrepareForShutdown(true)[?](//secure.freedesktop.org/write/www/ikiwiki.cgi?do=create&from=Software%2Fsystemd%2Finhibit&page=Software%2Fsystemd%2Finhibit%2FPrepareForSleep)/PrepareForSleep(true) without taking a delay lock is racy and should not be done, as any code that an application might want to execute on this signal might not actually finish before the suspend/shutdown cycle is executed.
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Note that watching PrepareForShutdown(true)/PrepareForSleep(true) without taking a delay lock is racy and should not be done, as any code that an application might want to execute on this signal might not actually finish before the suspend/shutdown cycle is executed.
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_Again_: if you watch PrepareForSuspend(true), then you really should have taken a delay lock first. PrepareForShutdown(false) may be subscribed to by applications which want to be notified about system resume events.
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@ -105,12 +105,11 @@ systemd adheres to the recommendations above and guarantees additional behavior
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It is hence OK to pre-create cgroups and then let systemd use it, without having systemd remove it afterwards.
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- If a service cgroup already exists, systemd will not override the attributes of the cgroup with the exception of those explicitly configured in the systemd unit files.
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It is hence OK to pre-create cgroups for use in systemd, and pre-apply attributes to it.
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- To avoid that systemd places all services in automatic cgroups in the "cpu" hierarchy change the [?](https://secure.freedesktop.org/write/www/ikiwiki.cgi?do=create&from=Software%2Fsystemd%2FPaxControlGroups&page=DefaultControllers) DefaultControllers= in /etc/systemd/system.conf and set it to the empty string.
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- To avoid that systemd places all services in automatic cgroups in the "cpu" hierarchy change the DefaultControllers= in /etc/systemd/system.conf and set it to the empty string.
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- By default systemd will place services only in automatic cgroups in the "cpu" hierarchy and in its own private tree "name=systemd".
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If you want it to duplicate these trees in other hierarchies add them to [?](https://secure.freedesktop.org/write/www/ikiwiki.cgi?do=create&from=Software%2Fsystemd%2FPaxControlGroups&page=DefaultControllers) DefaultControllers= in /etc/systemd/system.conf
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- To opt-out or opt-in specific services from the automatic tree generation in the kernel controller hierarchies use [?](https://secure.freedesktop.org/write/www/ikiwiki.cgi?do=create&from=Software%2Fsystemd%2FPaxControlGroups&page=ControlGroup) ControlGroup= in the unit file.
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Use "[?](https://secure.freedesktop.org/write/www/ikiwiki.cgi?do=create&from=Software%2Fsystemd%2FPaxControlGroups&page=ControlGroup) ControlGroup=cpu:/" to opt-out of cgroup assignment for a service or
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[?](https://secure.freedesktop.org/write/www/ikiwiki.cgi?do=create&from=Software%2Fsystemd%2FPaxControlGroups&page=ControlGroup) ControlGroup=cpu:/foo/bar" to manipulate the cgroup path.
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If you want it to duplicate these trees in other hierarchies add them to DefaultControllers= in /etc/systemd/system.conf
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- To opt-out or opt-in specific services from the automatic tree generation in the kernel controller hierarchies use ControlGroup= in the unit file.
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Use "ControlGroup=cpu:/" to opt-out of cgroup assignment for a service or "ControlGroup=cpu:/foo/bar" to manipulate the cgroup path.
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- Stay away from the name=systemd named hierarchy.
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It's private property of systemd.
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You are welcome to explore it, but it is uncool to modify it from outside systemd.
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