forked from rubenslte/android_kernel_samsung_msm8226
Shawn Bohrer
192f07a56e
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. Change-Id: Id8b9f88bdd783ef87bfa8d288a2fe7e86dd0b1e2 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> Git-commit: 89960feebaf4f9a53f93a0ce6888207e4a808799 Git-repo: git://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>