diff options
author | Shawn Bohrer <sbohrer@rgmadvisors.com> | 2013-01-14 17:55:31 (GMT) |
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committer | Ingo Molnar <mingo@kernel.org> | 2013-01-25 07:20:47 (GMT) |
commit | aa7f67304d1a03180f463258aa6f15a8b434e77d (patch) | |
tree | 14c1f290447fb84483c0eeed81806835a07d73f8 /kernel/sched/fair.c | |
parent | ff7532ca2c631e7e96dcd305a967b610259dc0ea (diff) | |
download | linux-fsl-qoriq-aa7f67304d1a03180f463258aa6f15a8b434e77d.tar.xz |
sched/rt: Use root_domain of rt_rq not current processor
When the system has multiple domains do_sched_rt_period_timer()
can run on any CPU and may iterate over all rt_rq in
cpu_online_mask. This means when balance_runtime() is run for a
given rt_rq that rt_rq may be in a different rd than the current
processor. Thus if we use smp_processor_id() to get rd in
do_balance_runtime() we may borrow runtime from a rt_rq that is
not part of our rd.
This changes do_balance_runtime to get the rd from the passed in
rt_rq ensuring that we borrow runtime only from the correct rd
for the given rt_rq.
This fixes a BUG at kernel/sched/rt.c:687! in __disable_runtime
when we try reclaim runtime lent to other rt_rq but runtime has
been lent to a rt_rq in another rd.
Signed-off-by: Shawn Bohrer <sbohrer@rgmadvisors.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Mike Galbraith <bitbucket@online.de>
Cc: peterz@infradead.org
Cc: <stable@kernel.org>
Link: http://lkml.kernel.org/r/1358186131-29494-1-git-send-email-sbohrer@rgmadvisors.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/fair.c')
0 files changed, 0 insertions, 0 deletions