From 25c2d55c00c6097e6792ebf21e31342f23b9b768 Mon Sep 17 00:00:00 2001 From: Li Zefan Date: Wed, 24 Mar 2010 13:17:50 +0800 Subject: sched: Remove USER_SCHED from documentation USER_SCHED has been removed, so update the documentation accordingly. Signed-off-by: Li Zefan Signed-off-by: Peter Zijlstra Acked-by: Serge E. Hallyn LKML-Reference: <4BA9A07E.8070508@cn.fujitsu.com> Signed-off-by: Ingo Molnar --- Documentation/scheduler/sched-rt-group.txt | 20 ++++---------------- 1 file changed, 4 insertions(+), 16 deletions(-) (limited to 'Documentation/scheduler/sched-rt-group.txt') diff --git a/Documentation/scheduler/sched-rt-group.txt b/Documentation/scheduler/sched-rt-group.txt index 86eabe6c3419..605b0d40329d 100644 --- a/Documentation/scheduler/sched-rt-group.txt +++ b/Documentation/scheduler/sched-rt-group.txt @@ -126,23 +126,12 @@ priority! 2.3 Basis for grouping tasks ---------------------------- -There are two compile-time settings for allocating CPU bandwidth. These are -configured using the "Basis for grouping tasks" multiple choice menu under -General setup > Group CPU Scheduler: - -a. CONFIG_USER_SCHED (aka "Basis for grouping tasks" = "user id") - -This lets you use the virtual files under -"/sys/kernel/uids//cpu_rt_runtime_us" to control he CPU time reserved for -each user . - -The other option is: - -.o CONFIG_CGROUP_SCHED (aka "Basis for grouping tasks" = "Control groups") +Enabling CONFIG_RT_GROUP_SCHED lets you explicitly allocate real +CPU bandwidth to task groups. This uses the /cgroup virtual file system and "/cgroup//cpu.rt_runtime_us" to control the CPU time reserved for each -control group instead. +control group. For more information on working with control groups, you should read Documentation/cgroups/cgroups.txt as well. @@ -161,8 +150,7 @@ For now, this can be simplified to just the following (but see Future plans): =============== There is work in progress to make the scheduling period for each group -("/sys/kernel/uids//cpu_rt_period_us" or -"/cgroup//cpu.rt_period_us" respectively) configurable as well. +("/cgroup//cpu.rt_period_us") configurable as well. The constraint on the period is that a subgroup must have a smaller or equal period to its parent. But realistically its not very useful _yet_ -- cgit v1.2.2