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Merge pull request #553 from poettering/rt-group-sched

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README: document that RT group sched should be turned off
This commit is contained in:
Tom Gundersen 2015-07-12 11:43:10 +02:00
parent 08abe30e78 f4e74be185
commit e239b628e0
1 changed files with 11 additions and 2 deletions
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README
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@ -82,11 +82,11 @@ REQUIREMENTS:
CONFIG_SECCOMP
CONFIG_CHECKPOINT_RESTORE (for the kcmp() syscall)
Required for CPUShares in resource control unit settings
Required for CPUShares= in resource control unit settings
CONFIG_CGROUP_SCHED
CONFIG_FAIR_GROUP_SCHED
Required for CPUQuota in resource control unit settings
Required for CPUQuota= in resource control unit settings
CONFIG_CFS_BANDWIDTH
For systemd-bootchart, several proc debug interfaces are required:
@ -97,6 +97,15 @@ REQUIREMENTS:
CONFIG_EFIVAR_FS
CONFIG_EFI_PARTITION
We recommend to turn off Real-Time group scheduling in the
kernel when using systemd. RT group scheduling effectively
makes RT scheduling unavailable for most userspace, since it
requires explicit assignment of RT budgets to each unit whose
processes making use of RT. As there's no sensible way to
assign these budgets automatically this cannot really be
fixed, and it's best to disable group scheduling hence.
CONFIG_RT_GROUP_SCHED=n
Note that kernel auditing is broken when used with systemd's
container code. When using systemd in conjunction with
containers, please make sure to either turn off auditing at