linux-kernel - Re: rhashtable: hang while running tests on boot

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Message-ID: <20141011155032.GZ4880@linux.vnet.ibm.com>
Date:	Sat, 11 Oct 2014 08:50:32 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Sasha Levin <sasha.levin@...cle.com>
Cc:	"David S. Miller" <davem@...emloft.net>, tgraf@...g.ch,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: rhashtable: hang while running tests on boot

On Fri, Oct 10, 2014 at 10:28:49AM -0400, Sasha Levin wrote:
> On 10/10/2014 10:22 AM, Paul E. McKenney wrote:
> > On Fri, Oct 10, 2014 at 09:40:03AM -0400, Sasha Levin wrote:
> >> > Hi all,
> >> > 
> >> > I'm sometimes observing the following hang during boot:
> > Any chance of a .config?  ;-)
> 
> Attached.

OK, and you already have CONFIG_PROVE_RCU=y, so scratch that advice.

> > I am guessing that this happens only when running the resizable hashtable
> > tests -- if that guess is incorrect, please let me know.
> 
> I've seen it a few times only with rhashtable related traces, if that ever
> changes I'll update - but for now I think it's safe to assume it's rhashtable
> specific.

Ah, so this is intermittent.  Joy.

							Thanx, Paul

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