Date: Sun, 12 May 2013 18:35:18 -0700
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: =?iso-8859-1?Q?Bj=F8rn?= Mork <bjorn@mork.no>,
        "Paul E. McKenney" <paul.mckenney@linaro.org>,
        linux-kernel@vger.kernel.org
Subject: Re: Bisected post-3.9 regression: Resume takes 5 times as much time
 as with v3.9
Message-ID: <20130513013518.GM3648@linux.vnet.ibm.com>
Reply-To: paulmck@linux.vnet.ibm.com
References: <87r4hdjsu5.fsf@nemi.mork.no>
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 <20130512182935.GD24440@8bytes.org>
 <20130512205747.GK3648@linux.vnet.ibm.com>
 <20130512213430.GE24440@8bytes.org>
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On Sun, May 12, 2013 at 11:34:30PM +0200, Joerg Roedel wrote:
> On Sun, May 12, 2013 at 01:57:48PM -0700, Paul E. McKenney wrote:
> > That does look pretty extreme!  If you build with CONFIG_RCU_NO_HZ=n,
> > but without the revert, do you still get the delays?
> 
> With CONFIG_RCU_NO_HZ=n (and no revert) the system boots fine, no boot
> delay. I also enabled some RCU debugging options (with
> CONFIG_RCU_NO_HZ=y), but didn't see anything so far.

OK, good -- we at least have an easy work-around while I am tracking
this down.  ;-)

							Thanx, Paul

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