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    SubjectRe: [patch] Re: autogroup: sched_setscheduler() fails
    On Thu, Jan 13, 2011 at 04:54:50AM +0100, Mike Galbraith wrote:
    > (mailer switched me to work account again. grrrr, switch yet again:)
    >
    > On Wed, 2011-01-12 at 14:32 +0800, Yong Zhang wrote:
    >
    > > Setting rt_runtime both in this patch and the previous one will make tune
    > > other's rt_runtime/rt_period trouble, I guess.
    >
    > Yeah, as in making it impossible to allocate even 1 usec :) We need
    > zero bandwidth though, so tell __sched_setscheduler() that autogroups
    > having zero allocated is perfectly fine.
    >
    > sched, autogroup: fix CONFIG_RT_GROUP_SCHED sched_setscheduler() failure.
    >
    > If CONFIG_RT_GROUP_SCHED is set, __sched_setscheduler() fails due to autogroup
    > not allocating rt_runtime. Free unused/unusable rt_se and rt_rq, redirect RT
    > tasks to the root task group, and tell __sched_setscheduler() that it's ok.
    >
    > Signed-off-by: Mike Galbraith <efault@gmx.de>
    > Reported-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
    >
    > ---
    > kernel/sched.c | 3 ++-
    > kernel/sched_autogroup.c | 27 +++++++++++++++++++++++++++
    > kernel/sched_autogroup.h | 4 ++++
    > 3 files changed, 33 insertions(+), 1 deletion(-)
    >

    Works fine here.

    Thanks,
    Bharata.


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