From: Borislav Petkov <bp@alien8.de>
To: Jiri Kosina <jkosina@suse.cz>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
Tony Luck <tony.luck@intel.com>,
linux-kernel@vger.kernel.org, x86@kernel.org
Subject: Re: NOHZ: WARNING: at arch/x86/kernel/smp.c:123 native_smp_send_reschedule
Date: Thu, 9 May 2013 14:58:59 +0200 [thread overview]
Message-ID: <20130509125859.GG27333@pd.tnic> (raw)
In-Reply-To: <20130509125040.GF27333@pd.tnic>
On Thu, May 09, 2013 at 02:50:40PM +0200, Borislav Petkov wrote:
> Looks like we're sending a resched IPI to a cpu which is not online
> yet in order to start the MCE polling timer. So the rcu* options are
> kinda unlikely to be related, AFAICT.
On a second thought, they must be somehow indirectly related because I
had "rcu_nocbs=4-7" on the command line and have the warning on the same
CPUs: 4 - 7.
Actually, NO_HZ_FULL_ALL makes all CPUs full dynticks so I'd guess the
RCU callback offloading happens on all of them, thus the warning can
happen on every CPU which is in full dynticks mode but not online yet.
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
next prev parent reply other threads:[~2013-05-09 12:55 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-09 12:29 Jiri Kosina
2013-05-09 12:50 ` Borislav Petkov
2013-05-09 12:58 ` Borislav Petkov [this message]
2013-05-15 18:45 ` Paul E. McKenney
2013-05-15 22:43 ` Borislav Petkov
2013-05-15 23:55 ` Paul E. McKenney
2013-05-17 13:56 ` NOHZ: WARNING: at arch/x86/kernel/smp.c:123 native_smp_send_reschedule, round 2 Borislav Petkov
2013-05-20 3:16 ` Michael Wang
2013-05-20 4:50 ` Borislav Petkov
2013-05-20 6:23 ` Michael Wang
2013-05-20 6:47 ` Borislav Petkov
2013-05-20 6:58 ` Michael Wang
2013-05-20 7:06 ` Michael Wang
2013-05-20 7:12 ` Viresh Kumar
2013-05-20 7:25 ` Michael Wang
2013-05-20 8:56 ` Michael Wang
2013-05-20 9:09 ` Viresh Kumar
2013-05-20 9:24 ` Michael Wang
2013-05-20 13:23 ` Borislav Petkov
2013-05-20 13:43 ` Viresh Kumar
2013-05-20 15:08 ` Borislav Petkov
2013-05-21 2:20 ` Michael Wang
2013-05-21 2:37 ` Michael Wang
2013-05-21 7:21 ` Borislav Petkov
2013-05-21 7:58 ` Michael Wang
2013-05-20 7:36 ` Tejun Heo
2013-05-20 8:10 ` Frederic Weisbecker
2013-05-20 9:31 ` Srivatsa S. Bhat
2013-05-20 9:40 ` Viresh Kumar
2013-05-20 10:24 ` Viresh Kumar
2013-06-04 21:20 ` Jiri Kosina
2013-06-05 2:30 ` Michael Wang
2013-06-05 8:08 ` Jiri Kosina
2013-06-05 8:12 ` Michael Wang
2013-05-10 0:29 ` NOHZ: WARNING: at arch/x86/kernel/smp.c:123 native_smp_send_reschedule Frederic Weisbecker
2013-05-10 9:28 ` Borislav Petkov
2013-05-10 9:26 ` Frederic Weisbecker
2013-05-10 9:37 ` Ingo Molnar
2013-05-10 9:45 ` Borislav Petkov
2013-05-10 15:31 ` Frederic Weisbecker
2013-05-10 9:43 ` Borislav Petkov
2013-05-10 15:42 ` Jiri Kosina
2013-05-10 15:03 ` Jiri Kosina
2013-05-10 15:21 ` Borislav Petkov
2013-05-10 15:43 ` Frederic Weisbecker
2013-05-10 16:23 ` Borislav Petkov
2013-05-10 21:38 ` Frederic Weisbecker
2013-05-13 14:56 ` Jiri Kosina
2013-05-13 19:40 ` Thomas Gleixner
2013-05-13 20:01 ` Jiri Kosina
2013-05-14 15:46 ` [tip:timers/urgent] tick: Don't invoke tick_nohz_stop_sched_tick( ) if the cpu is offline tip-bot for Thomas Gleixner
2013-05-15 19:41 ` Frederic Weisbecker
2013-05-16 14:06 ` Thomas Gleixner
2013-05-16 14:15 ` Borislav Petkov
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