On Thu, Feb 06, 2014 at 07:46:35PM +0800, Fengguang Wu wrote:
> On Thu, Feb 06, 2014 at 12:27:31PM +0100, Peter Zijlstra wrote:
> > On Thu, Feb 06, 2014 at 05:56:46PM +0800, Fengguang Wu wrote:
> > > Hi Peter,
> > >
> > > We noticed the below RCU stalls which will block the system.
> > > The problem is bisected to
> > >
> > > commit 8cb75e0c4ec9786b81439761eac1d18d4a931af3
> > > Author: Peter Zijlstra <pet...@infradead.org>
> > > AuthorDate: Wed Nov 20 12:22:37 2013 +0100
> > > Commit: Ingo Molnar <mi...@kernel.org>
> > > CommitDate: Mon Jan 13 17:38:55 2014 +0100
> > >
> > > sched/preempt: Fix up missed PREEMPT_NEED_RESCHED folding
> > >
> > > arch/x86/include/asm/mwait.h | 2 +-
> > > include/linux/preempt.h | 15 +++++++++++++++
> > > include/linux/sched.h | 15 +++++++++++++++
> > > kernel/cpu/idle.c | 17 ++++++++++-------
> > > kernel/sched/core.c | 3 +--
> > > 5 files changed, 42 insertions(+), 10 deletions(-)
> > >
> > > [ 85.786775] INFO: rcu_sched self-detected stall on CPU { 1} (t=15000
> > > jiffies g=233 c=232 q=1940)
> >
> > Did the initial kernel contain the below?
>
> Nope, so I was testing some old tip sched/core.. Bisect log is
Peter, I just checked and find no longer showing up in new kernel tests.
So it must have been fixed up. Sorry for the noises!
Regards,
Fengguang
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