Messages in this thread | | | Date | Thu, 6 Feb 2014 19:53:33 +0800 | From | Fengguang Wu <> | Subject | Re: [sched/preempt] INFO: rcu_sched self-detected stall on CPU { 1} |
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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 <peterz@infradead.org> > > > AuthorDate: Wed Nov 20 12:22:37 2013 +0100 > > > Commit: Ingo Molnar <mingo@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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