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

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Message-ID: <20141011222615.GB14186@casper.infradead.org>
Date:	Sat, 11 Oct 2014 23:26:15 +0100
From:	Thomas Graf <tgraf@...g.ch>
To:	Sasha Levin <sasha.levin@...cle.com>
Cc:	paulmck@...ux.vnet.ibm.com,
	"David S. Miller" <davem@...emloft.net>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: rhashtable: hang while running tests on boot

On 10/11/14 at 12:09pm, Sasha Levin wrote:
> On 10/11/2014 11:50 AM, Paul E. McKenney wrote:
> >>> > > 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.
> 
> Yup, I'm seeing it in about 10% of boot attempts.

Have you ever seen any traces outside of the test_rht code?  I'm
trying to figure out whether it's a bug in the test code or in the
hash table itself.
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