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authorLennart Poettering <lennart@poettering.net>2012-04-13 23:24:47 +0200
committerLennart Poettering <lennart@poettering.net>2012-04-13 23:29:59 +0200
commitecedd90fcdf647f9a7b56b4934b65e30b2979b04 (patch)
tree6e8bc8e509801a7c3801c1e77244df6dec72ac1c /docs/libudev
parent3b6d9a7c50bd7217a0ca80d39fd30decbb0c935a (diff)
service: place control command in subcgroup control/
Previously, we were brutally and onconditionally killing all processes in a service's cgroup before starting the service anew, in order to ensure that StartPre lines cannot be misused to spawn long-running processes. On logind-less systems this has the effect that restarting sshd necessarily calls all active ssh sessions, which is usually not desirable. With this patch control processes for a service are placed in a sub-cgroup called "control/". When starting a service anew we simply kill this cgroup, but not the main cgroup, in order to avoid killing any long-running non-control processes from previous runs. https://bugzilla.redhat.com/show_bug.cgi?id=805942
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