Re: frequent lockups in 3.18rc4

From: Dave Jones
Date: Wed Nov 19 2014 - 00:15:44 EST

On Tue, Nov 18, 2014 at 08:40:55PM -0800, Linus Torvalds wrote:

> Hmm, if we are getting soft-lockups here, maybe it suggest too much exit-work.
> Some TIF_NOHZ loop, perhaps? You have nohz on, don't you?
> That makes me wonder: does the problem go away if you disable NOHZ?

Does nohz=off do enough ? I couldn't convince myself after looking at
dmesg, and still seeing dynticks stuff in there.

I'll do a rebuild with all the CONFIG_NO_HZ stuff off, though it also changes
some other config stuff wrt timers.


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