Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754049AbbKBVSN (ORCPT ); Mon, 2 Nov 2015 16:18:13 -0500 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:45268 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751275AbbKBVSK (ORCPT ); Mon, 2 Nov 2015 16:18:10 -0500 Date: Mon, 2 Nov 2015 21:17:56 +0000 From: Mark Brown To: John Stultz Cc: Sascha Hauer , Ulf Hansson , Bjorn Andersson , lkml Message-ID: <20151102211756.GK20228@sirena.org.uk> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="SCOJXUq1iwCn05li" Content-Disposition: inline In-Reply-To: X-Cookie: Even bytes get lonely for a little bit. User-Agent: Mutt/1.5.24 (2015-08-30) X-SA-Exim-Connect-IP: 94.175.94.161 X-SA-Exim-Mail-From: broonie@sirena.org.uk Subject: Re: MMC/regulator boot hang in -next X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on mezzanine.sirena.org.uk) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1902 Lines: 48 --SCOJXUq1iwCn05li Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Nov 02, 2015 at 11:57:40AM -0800, John Stultz wrote: > Trying to move my nexus7 work to -next, I started seeing boot time > hangs. Enabling some debug options provided with a lockdep spew. Please don't send upstream things to my work address, it's unlikely to get read normally. > Reverting "regulator: core: Propagate voltage changes to supply > regulators" - fc42112c0eaa avoids the hang, but I still see lockdep > noise. To repeat what I said off-list the lockdep splat looks like yet another case of lockdep generating false positives by being unable to work out that two different instances of objects of the same type are different objects. =20 Without more information on the system you're looking at, especially what regulators are involved and how they are related it's hard to tell what's going on as a result, getting some trace from the tracepoints would be more useful. Nothing obvious is jumping out from the code. --SCOJXUq1iwCn05li Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBCAAGBQJWN9MEAAoJECTWi3JdVIfQclYH/2cA3wM8tKK2k1ARQTS+QU1T BYoWbu/GCTIt2Z3oiZkkZPQdTZzq3P1VdWb6H9AoCa9BUZbNCcxqQefZt/fj0hVh IWnqfB7PWJOK3KNbwag3CQGc3DODo28H09gdsh/LoOoCgGxxRq4WaLAHMaLr6mTa D1M6u8vPEq4AXZmSxQtGfQ4423Vjud14qqDVy1cEmziQxWj2HeNKK6mFkaQbIraE GuWozWfhpJQpdVRDjbSVFl03DWzoEimNllxjitAhuXgq891HD57ZJdYi+GNm5vko tYtft190UzJJDkVf3mSl7eEuWgdaP2j8FpZfLGMrR9bx/uo2RtXQ+8pS7lNINnA= =cpYu -----END PGP SIGNATURE----- --SCOJXUq1iwCn05li-- -- 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/