Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751718Ab3ELVed (ORCPT ); Sun, 12 May 2013 17:34:33 -0400 Received: from 8bytes.org ([85.214.48.195]:49208 "EHLO mail.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751187Ab3ELVec (ORCPT ); Sun, 12 May 2013 17:34:32 -0400 Date: Sun, 12 May 2013 23:34:30 +0200 From: Joerg Roedel To: "Paul E. McKenney" Cc: =?iso-8859-1?Q?Bj=F8rn?= Mork , "Paul E. McKenney" , 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: <20130512213430.GE24440@8bytes.org> References: <87r4hdjsu5.fsf@nemi.mork.no> <20130512113157.GG3648@linux.vnet.ibm.com> <20130512182935.GD24440@8bytes.org> <20130512205747.GK3648@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130512205747.GK3648@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-DSPAM-Result: Whitelisted X-DSPAM-Processed: Sun May 12 23:34:31 2013 X-DSPAM-Confidence: 0.9961 X-DSPAM-Probability: 0.0000 X-DSPAM-Signature: 51900ae723672227717730 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 629 Lines: 17 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. Joerg -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/