summaryrefslogtreecommitdiffstats
path: root/init
diff options
context:
space:
mode:
authorPaul Turner <pjt@google.com>2011-07-21 09:43:27 -0700
committerIngo Molnar <mingo@elte.hu>2011-08-14 12:01:13 +0200
commit953bfcd10e6f3697233e8e5128c611d275da39c1 (patch)
treea3ca8136bb9e992bb40945c5eee2a8dcc0fd0b57 /init
parent5710f15b52664ae0bfa60a66d75464769d297b2b (diff)
downloadop-kernel-dev-953bfcd10e6f3697233e8e5128c611d275da39c1.zip
op-kernel-dev-953bfcd10e6f3697233e8e5128c611d275da39c1.tar.gz
sched: Implement hierarchical task accounting for SCHED_OTHER
Introduce hierarchical task accounting for the group scheduling case in CFS, as well as promoting the responsibility for maintaining rq->nr_running to the scheduling classes. The primary motivation for this is that with scheduling classes supporting bandwidth throttling it is possible for entities participating in throttled sub-trees to not have root visible changes in rq->nr_running across activate and de-activate operations. This in turn leads to incorrect idle and weight-per-task load balance decisions. This also allows us to make a small fixlet to the fastpath in pick_next_task() under group scheduling. Note: this issue also exists with the existing sched_rt throttling mechanism. This patch does not address that. Signed-off-by: Paul Turner <pjt@google.com> Reviewed-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20110721184756.878333391@google.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions
OpenPOWER on IntegriCloud