Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751100Ab3FCGcI (ORCPT ); Mon, 3 Jun 2013 02:32:08 -0400 Received: from haggis.pcug.org.au ([203.10.76.10]:51588 "EHLO members.tip.net.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750872Ab3FCGcA (ORCPT ); Mon, 3 Jun 2013 02:32:00 -0400 Date: Mon, 3 Jun 2013 16:31:45 +1000 From: Stephen Rothwell To: Andrew Morton Cc: Sachin Kamat , LKML , chanho.min@lge.com, Kamil Debski , Sylwester Nawrocki , Arun Kumar K Subject: Re: Regression introduced by commit "lib/bitmap.c: speed up bitmap_find_free_region" Message-Id: <20130603163145.f51c89410bd223d74e9b4fb9@canb.auug.org.au> In-Reply-To: <20130531120542.87e2056dc7c129e72b83f2af@linux-foundation.org> References: <20130531120542.87e2056dc7c129e72b83f2af@linux-foundation.org> X-Mailer: Sylpheed 3.4.0beta4 (GTK+ 2.24.18; i486-pc-linux-gnu) Mime-Version: 1.0 Content-Type: multipart/signed; protocol="application/pgp-signature"; micalg="PGP-SHA256"; boundary="Signature=_Mon__3_Jun_2013_16_31_45_+1000_rf_yh9vmq2Crl9wc" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2642 Lines: 67 --Signature=_Mon__3_Jun_2013_16_31_45_+1000_rf_yh9vmq2Crl9wc Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Andrew, On Fri, 31 May 2013 12:05:42 -0700 Andrew Morton wrote: > > On Fri, 31 May 2013 12:15:10 +0530 Sachin Kamat = wrote: >=20 > > While testing MFC decoder on Exynos machines, I encountered some > > memory allocation errors due to failure of dma_alloc_coherent(). > > File: drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c Line: 38. > >=20 > > Git bisect pointed me to the following commit as the first bad commit > > (linux-next tree of 20130531): > >=20 > > commit 3d5272d9b289cd0930b2ea9984406d757a72f4dd > > Author: Chanho Min > > Date: Thu May 23 10:37:28 2013 +1000 > > lib/bitmap.c: speed up bitmap_find_free_region > >=20 > > Reverting this (and the commit 197e1cf7 > > ("ib-bitmapc-speed-up-bitmap_find_free_region-fix") ) fixes this > > issue. > >=20 > > Looks like some regression has been introduced by the above patch? >=20 > Thanks. I dropped the patches for now, to minimise linux-next > breakage. Hopefully we'll be able to identify and fix this at a later > time. I removed those 2 patches from the akpm tree in linux-next today as well. --=20 Cheers, Stephen Rothwell sfr@canb.auug.org.au --Signature=_Mon__3_Jun_2013_16_31_45_+1000_rf_yh9vmq2Crl9wc Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.20 (GNU/Linux) iQIcBAEBCAAGBQJRrDhVAAoJEECxmPOUX5FEVG4P/2mw6aSlwqcCKmwyS1bpIuz2 tQhNO2Q9gUFHKuXxSRvZkdLIKgiV0MTy7EJquJGopVuROM8JR4L1kOdm8FWEtsWD UzTTlnLq5qwmwlaJuYWmQHt6FIbJLndBV71XWM5KlXWQDLqqL7kiaPEDVaZ2I11/ l5G30l7+KraBXt5olkSk4cb3KVHvhNeNSKQHRAzzbPdqgEO6AtQ14oHli+Sf+KLu K5crQkWhBc21ocxvzjEA22Fh0bYjoaZ/MKwCJwB0JZA/lG66sNM55Gn6GRG8ABjU 9DbTdzGL7cp6xTryc8XAztO8BKYkX+QiBU+4cvaFbECVq6bNpENKO9llhG3wTm3f /iXa/JUySMx2K8zJyF8mby6uYYjJksMXgKscRMx7cFkI0Dxr3AKOCMMRB90EKFWf I8A5c5AaIyQQfXRaBLIWX3AOAt1ayFEKFKey19fuS7EhQrV54P+47OGQ03xb7cAN C4PjoyRNXS3EHi3GpmgytshYsEBk4iltAPN21OQfSvXGOxru5egwelD6YWzJI+3I AcAut0O+PUmpVya0ntJYW2WWi6GYLMa5mxRkiV1WL5ZIzQLP3d3mqsdfEQKyQaCe AL5QSuPgroiFBMffEdwqSK3BWUsSmv7TVLiUobM3bwK4i6KCvt4ltr/z7DmZUQSU ppLB2vgKnXHNJ4F98glB =AXf1 -----END PGP SIGNATURE----- --Signature=_Mon__3_Jun_2013_16_31_45_+1000_rf_yh9vmq2Crl9wc-- -- 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/