On Wed, Dec 03, 2014 at 02:59:58PM -0500, Chris Mason wrote:
> > [ 503.692038] Switched to clocksource hpet
> > [ 524.420897] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s!
> > [trinity-c178:20182]
>
> Neat. We often see switching to hpet on boxes as they are diving into
> softlockup pain, but it's not usually before the softlockups.
>
> Are you configured for CONFIG_NOHZ_FULL?
No. I have recollections that I did run with that early on in this, but
I think someone asked me to try without that a few weeks back, and it's
been off since. (made no difference)
> I'd love to blame the only commit to kernel/smp.c between 3.16 and 3.17
>
> commit 478850160636c4f0b2558451df0e42f8c5a10939
> Author: Frederic Weisbecker <fweis...@gmail.com>
> Date: Thu May 8 01:37:48 2014 +0200
>
> irq_work: Implement remote queueing
>
> You've also mentioned a few times where messages stopped hitting the
> console?
>
> commit 5874af2003b1aaaa053128d655710140e3187226
> Author: Jan Kara <j...@suse.cz>
> Date: Wed Aug 6 16:09:10 2014 -0700
>
> printk: enable interrupts before calling
> console_trylock_for_printk()
Hmm..
Dave
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