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| author | Mike Galbraith <efault@gmx.de> | 2011-02-01 09:50:51 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-02-03 14:20:33 +0100 |
| commit | d95f412200652694e63e64bfd49f0ae274a54479 (patch) | |
| tree | d2abb7b2c635bbc9f344b45051b6186b1317718c /kernel/sys.c | |
| parent | ac53db596cc08ecb8040cfb6f71ae40c6f2041c4 (diff) | |
| download | op-kernel-dev-d95f412200652694e63e64bfd49f0ae274a54479.zip op-kernel-dev-d95f412200652694e63e64bfd49f0ae274a54479.tar.gz | |
sched: Add yield_to(task, preempt) functionality
Currently only implemented for fair class tasks.
Add a yield_to_task method() to the fair scheduling class. allowing the
caller of yield_to() to accelerate another thread in it's thread group,
task group.
Implemented via a scheduler hint, using cfs_rq->next to encourage the
target being selected. We can rely on pick_next_entity to keep things
fair, so noone can accelerate a thread that has already used its fair
share of CPU time.
This also means callers should only call yield_to when they really
mean it. Calling it too often can result in the scheduler just
ignoring the hint.
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20110201095051.4ddb7738@annuminas.surriel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sys.c')
0 files changed, 0 insertions, 0 deletions
